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19-4751; Rev 2; 7/98
MAX147 Evaluation System/Evaluation Kit
General Description
The MAX147 evaluation system (EV system) is a complete, low-cost, 8-channel data-acquisition system consisting of a MAX147 evaluation kit (EV kit) and a Maxim 68HC16 or 80C32 microcontroller (C) module. IBM PC-compatible software provides a handy user interface to exercise the MAX147's features. Source code is provided. Order the EV system for comprehensive evaluation of the MAX147 using a personal computer. Order the EV kit if the 68HC16 or 80C32 C module was purchased previously with another Maxim EV system, or for custom use in other C-based systems. The MAX147 EV kit evaluates both the MAX147 and the MAX146. To evaluate the MAX146, order a free sample of the MAX146BCPP along with the MAX147 EV kit. Proven PC Board Layout Complete Evaluation System Convenient Test Points Provided On-Board Data-Logging Software Source Code Provided Fully Assembled and Tested
Features
Evaluates: MAX146/MAX147
Ordering Information
PART MAX147EVKIT-DIP MAX147EVC16-DIP MAX147EVC32-DIP TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C BOARD TYPE Through-Hole Through-Hole Through-Hole
Component List
DESIGNATION QTY C1, C7-C14 C2, C4, C6, C15, C17-C20 C3 C5 C16 J1 J18 JU1, JU2, JU5 R1-R8 R9 R10-R13 R14 R15 R16 R17, R21 R18 U1 U2 U3 U4 U5 U6 U7 None None 9 8 1 1 1 1 1 3 8 1 0 1 1 1 2 1 1 1 1 1 1 1 1 1 1 DESCRIPTION 0.01F ceramic capacitors 0.1F ceramic capacitors 4.7F tantalum capacitor 10F tantalum capacitor 0.047F ceramic capacitor 2x20 right-angle socket 10-pin header 2-pin jumpers 1k, 5% resistors 10k, 5%, 10-pin SIP resistor pack Open 220k, 5% resistor 180k, 5% resistor 100k trim pot 1M, 5% resistors 100, 5% resistor Maxim MAX147BCPP Maxim MAX872CPA Maxim MAX393CPE Maxim MAX666CPA Maxim MAX495CPA 74HCT04 Maxim MAX494CPD PC board Software disk, MAX147 Evaluation Kit QTY 1 1
MAX147EVC16 System Component List
DESCRIPTION MAX147 Evaluation Kit (MAX147EVKIT-DIP) 68HC16 C Module (68HC16MODULE-DIP)
MAX147EVC32 System Component List
QTY 1 1 DESCRIPTION MAX147 Evaluation Kit (MAX147EVKIT-DIP) 80C32 C Module (80C32MODULE-DIP)
MAX147 Stand-Alone EV Kit
The MAX147 EV kit provides a proven PC board layout to facilitate evaluation of the MAX147. It must be interfaced to appropriate timing signals for proper operation. Refer to the MAX147 data sheet for timing requirements. The MAX147 EV kit operates with either a 3V supply or a 5V supply. The EV kit's own 3V regulator is powered by a user-supplied 5V source. Trim pot R16 sets the actual 3V voltage. R16 is adjustable from approximately 2.3V to 3.6V. If a 3V power supply is already in use, disable the onboard 3V regulator by unplugging the MAX666 from its socket. Then connect the 3V supply to the VDD input pad.
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________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.
MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
3V-Only Systems
For 3V systems, unplug the MAX666 regulator and connect your 3V power supply to the VDD input pad. Connect the 3V and 5V input pads to each other to power the MAX393. (The MAX393 can be powered with 3V or 5V. See Detailed Description of Hardware section.) For development flexibility, the EV kit uses a MAX393 to route the EXTCOM signal to COM or to the CH0 input. Obtain the 3V DOUT and SSTRB signals from the header J18, not from the 40-pin connector (3V-only systems do not require the 74HCT04 level translator). 5) Start the MAX147 software on the IBM PC by setting the current directory to match the directory containing the Maxim programs, then type the program name MAX147. Do not turn off or disconnect the C module while the program is running; if you do, you will have to restart the program. The program asks which C module is in use and to which port it is connected (the default C is the 68HC16). For the 80C32 C module, press C to select the 80C32. Press the space bar until the correct PC serial port is highlighted, and press ENTER. The MAX147 program is now in terminalemulation mode. Turn on the C module's power. The module displays its log-on banner and tests its RAM. Download and run the RAM resident program on the C module by pressing ALT+L (i.e., hold down the ALT key as you strike the L key). The program prompts you for the file name. Press the ENTER key to download and run the file.
6)
Systems Using 5V Logic
For 5V-logic systems, the 74HCT04 translates the MAX147's 3V outputs to 5V levels. The MAX147's input may be driven directly by 5V logic levels (obtain the 5V DOUT and SSTRB signals from the 40-pin connector). For 5V-only applications, refer to the MAX186/MAX188 analog-to-digital converters. 7) 8)
MAX147 EV System
The MAX147 EV system operates from a user-supplied 9V to 20V DC power supply, from which it generates a 5V supply for the C board. A 3V regulator supplies power to the MAX147. 3V to 5V level translators are provided to interface the MAX147 with the C board. 9)
Quick Start
1) Copy the files from the distribution disk to your hard disk or to blank floppy disks. Make sure that the MAX147 EV kit software is in its own directory. The necessary files are in the root directory of the distribution disk, and the source code is in the SOURCE subdirectory. The SOURCE subdirectory is not required to operate the EV system. Carefully connect the boards by aligning the MAX147 EV kit's 40-pin header with the C module's 40-pin connector. Gently press them together, so that they are flush against one another. Connect a 9V to 15V DC power source to the C module at the terminal block. This is located next to the on/off switch, in the upper-right corner of the C module. Observe the polarity marked on the board. Connect a cable from the computer's serial port to the C module. For a 9-pin serial port, use a straight-through, 9-pin female-to-male cable. If the only available serial port uses a 25-pin connector, a standard 25-pin to 9-pin adapter is required. The EV kit software checks the modem status lines (CTS, DSR, DCD) to confirm that the correct port is selected.
Press ALT+C to switch to the control panel screen after the RAM resident program is successfully downloaded. 10) Apply input signals to the CH0-CH7 inputs at the top edge of the MAX147 EV kit board. Observe the readout on the screen. Table 3 lists the commands available from the control panel screen. 11) Before turning off power to the MAX147 EV kit, exit the program by pressing ALT+X.
Evaluating the MAX146
To evaluate the MAX146, turn off power to the EV kit, remove the MAX147 IC, and replace it with a MAX146BCPP. Disable the external reference by removing jumpers JU2 and JU5. Type MAX147 146 to start the software.
2)
3)
Detailed Description _________________________of Software
Shutdown Power Cycling (MAX147)
From the control panel, use the up/down arrow keys to select the power cycling mode. Power cycling puts the MAX147 in powerdown (FULLPD) mode between readings. The MAX147 is always fully powered during conversions.
4)
Shutdown Power Cycling (MAX146)
From the control panel, use the up/down arrow keys to select the power cycling mode. The MAX146 supports FULLPD mode as well as FASTPD mode, where the
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MAX147 Evaluation System/Evaluation Kit
internal 1.2V bandgap reference remains active. The MAX146 is always fully powered during conversions. When used with the slower data-logging command, specify the delay in seconds. The delay is between enabled channels, and one line of data is logged after all enabled channels have been polled.
Evaluates: MAX146/MAX147
Low-Speed Data Logging
The RS-232 serial link limits the data-logging sample rate to no more than 10sps (samples per second). The data-logging command is used to write data to a userspecified file in plain comma-spaced-value text format. From the control panel screen, press L. If a log file is not already open, the software asks for a file name. Only one log file is allowed per session. Once a log file is open, press L to toggle data logging on or off. With data logging enabled, "Logging" flashes on the screen. One complete line of data is written after all enabled channels are sampled. The first line of the log file contains the column headings. Each subsequent line of the log file contains all eight channels, separated by commas. The values are written as raw decimal output codes or as scaled voltages, depending on which setting the control panel is currently displaying. Use the C and V commands to select the display format (Table 3). F3, the log data marker command, can be used to sequentially tag different sections of the log file to indicate a change in setup or input conditions. Pressing F3 writes an extra entry at the end of the current line of the data log, to indicate a change in setup or input conditions.
COM Voltage
COM is connected to ground (default) or to a usersupplied analog common voltage applied to the EXTCOM input pad. Press F6 to select the desired COM connection. The EV kit software can measure a user-applied COM voltage. When F4 is pressed from the control panel screen (Table 3), the software connects the EXTCOM input pad to input channel 0. Next, the software connects COM to ground. The channel 0 voltage is measured in single-ended unipolar mode. The measurement is performed several times and averaged. After measuring the external COM pad voltage, the switches are restored to their previous configuration.
Operating with QSPI, 24 Bits per Transfer
The EV kit software program KIT147.S19 loaded into the 68HC16 module uses a 24-bits-per-transfer mode, which operates at 59ksps throughput. Refer to the timing diagrams in the Clock Modes section of the MAX147 data sheet.
High-Speed Data Sampling
The S command samples rates over 10 samples per second (sps). Data is collected from only one of the eight channels at a rate from 100sps to 91ksps. First, select the channel by pressing one of the number keys 0-7. Next, press F to specify the name of the file into which the samples should be written. If the file already exists, the screen displays "*** file already exists ***". To begin collecting data, press B. After the samples are collected, the data is automatically uploaded to the host and stored in the sample file.
Table 1. Recommended QSPI Setup Parameters for 24 Bits per Transfer (used in KIT147.S19)
PARAMETER SPBR CPOL CPHA BITS DTL TR0 TR1 CR0 CR1 RR1 5 (1.68MHz) 0 (clock is idle low) 0 (data is stable on clock rising edge) 16 (when enabled) 4 (7.6s delay used in internal clock mode) 0000 0000 1xxx xxyy (configure and start conversion) 0000 0000 0000 0000 (read data) External clock: 1000 xxx0 (hold CS low). Internal clock: 1010 xxx0 (hold CS low; DT delay after transfer). 0100 xxx0 (16-bit enable) Received data, left justified, with one leading zero bit VALUE
Controlling the Sampling Rate
The rate for high-speed sampling, data logging, and the oscilloscope demo mode (Table 3, key O) is controlled by the D (delay between samples) command. When used with the sample or oscilloscope demo commands, specify the approximate delay in microseconds or milliseconds by typing D, then the number, then "sec" or "msec". Always verify timing by using an oscilloscope, since this delay is not linear due to code overhead. The fast sampling screen and oscilloscope demo mode use delays from 100s to 1000s. The 68HC16 software supports delays between 68s and 1000ms. The 80C32 software supports delays between 450s and 70ms.
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
Operating with QSPI, 16 Bits per Transfer
The program KIT14716.S19 demonstrates the 16-bitsper-transfer interface scheme, which operates at 91ksps throughput. In this demonstration, CS is held low and the QSPI operates continuously in the background. Refer to the timing diagrams in the Clock Modes section of the MAX147 data sheet. To use this program, follow the instructions in Quick Start, but in step 8, download KIT14716.S19 instead of KIT147.S19. After loading, press ALT+C to switch to the control panel. For lowest component count, enable the MAX146's internal reference by removing the shunts from JU2 and JU5. This enables the internal bandgap reference and the reference buffer, driving VREF internally to 2.5V. A 0.01F ceramic bypass capacitor near REFADJ (C1 on the EV kit) provides noise filtering for the bandgap reference.
Detailed Description of Hardware
The MAX147 EV kit board includes a MAX666, configured as a 3V regulator. Trim pot R16 adjusts the VDD voltage between 2.3V and 3.6V. The MAX872 is a micropower 2.5V reference. The MAX494 and MAX495 are low-voltage, rail-to-rail op amps with 500kHz gain-bandwidth product. The MAX495 buffers the external COM input source. The MAX494 can be used to buffer some of the input signals. The MAX393 analog switch allows the EV kit software to route the MAX147 COM pin to ground or to the external COM input. In addition, the external COM input can be routed to input channel 0. Typical systems connect COM directly to analog ground or the analog common voltage. The MAX393 can be powered by 3V, but if driven by 5V logic (as is the case with the EV system), it must be powered by 5V. The 74HCT04 translates the DOUT and SSTRB signals from 3V to 5V logic levels for interfacing to the C module. The MAX147's logic inputs can be driven directly from 5V logic levels.
Changing the Reference Voltage
The MAX147 EV kit software assumes a 2.5V reference voltage, unless otherwise specified. When using a reference value other than 2.5V, specify the value when starting the program. For example, if VREF is driven by a 2.048V reference, start the MAX147 software by typing: MAX147 VREF 2.048 Or, on the MAX146, if REFADJ is driven by a 1.2V reference, start the MAX147 software by typing:
MAX147 146 REFADJ 1.2 The external reference's temperature coefficient must be 20ppm/C or less to achieve accuracy to within four LSBs over the 0C to +70C temperature range. For 12-bit accuracy over the 0C to +70C range, the reference's temperature coefficient must be 4ppm/C or less. The MAX146 can use either its internal reference or an external reference. On the EV kit, the internal reference has been disabled by pulling REFADJ up to VDD (JU2) and driving VREF with a MAX872 2.5V reference (JU5).
Input-Signal Buffering
The analog-to-digital converter (ADC) inputs require a sufficiently low-impedance source for specified accuracy. An ADC can inject a small amount of charge at the start of the acquisition time, and the source signal must recover to within the desired accuracy before the acquisition time ends. If the source by itself cannot do this, use an op amp to buffer the input signal. To buffer the CH4-CH7 input signals, unplug the 14-pin header from U7, and install the supplied MAX494 quad op amp in its place. Note the location of pin 1 toward the upper right corner of the board. When using an input buffer, the buffer output cannot reach the power-supply rails. If the MAX494 op-amp buffer is installed and the input to the buffer is grounded, the buffered output will not reach ground. The MAX494 allows its output signal to go to within approximately 50mV of either supply.
Table 2. Recommended QSPI Setup Parameters for 16 Bits per Transfer (used in KIT14716.S19)
PARAMETER SPBR CPOL CPHA BITS DTL TR0 VALUE 5 (1.68MHz) 0 (clock is idle low) 0 (data is stable on clock rising edge) 16 4 (7.6s delay used in internal clock mode) 0000 0001 xxxx xyy0 (configure and start conversion) External clock: 1100 xxx0 (16-bit transfer). Internal clock: 1110 xxx0 (16-bit transfer with DT delay). Received data, left justified
CR0 RR0
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MAX147 Evaluation System/Evaluation Kit
Table 3. MAX147 EV Kit Command Reference
KEY 0, 1, 2, 3, 4, 5, 6, 7 C D L O FUNCTION Enables or disables the corresponding input channel 0, 1, 2, 3, 4, 5, 6, or 7. The EV kit software scans all enabled channels. Displays the conversion results in decimal form. Delay between samples. Delays longer than one second are handled by the IBM PC; otherwise, the C module handles the delay. Timing is approximate and should be verified with an oscilloscope. Enables or disables data logging. If the -L command-line option was not specified, the L command prompts for a log-file name. Oscilloscope demo. Samples are collected and discarded as fast as possible. Observe waveforms and timing with an oscilloscope. Power-up delay. Timing is approximate and should be verified with an oscilloscope. When using an external reference, power-up delay is not necessary and should be set to zero. Power-up delay is used regardless of which power-cycling mode is selected. Samples one of the eight inputs at high speed. The sampling rate is controlled by the P and D delays. Due to program overhead, the O and S commands operate at different rates. Timing should be verified with an oscilloscope. Displays the conversion results in volts. Chooses input scale (unipolar, bipolar, unipolar differential, bipolar differential) for all enabled channels. Disabled channels are unaffected. Writes a marker into the data-log file. Measures the value of a user-applied COM voltage. Changes the assumed value of VREF. Changes the assumed voltage at COM. Selecting G connects the COM pin to ground; selecting E connects the COM pin to the EXTCOM input pad. Internal clock mode External clock mode Selects power-down mode. Switches back to terminal mode. Exits to DOS.
Evaluates: MAX146/MAX147
P
S V F1 F3 F4 F5 F6 F7 F8 , ALT+T ALT+X
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
Table 4. Command-Line Options when Starting MAX147 Software
COMMAND 1 2 MONO -Lfilename VREF vvv COM vvv ? 146 Defaults to COM1 PC serial port. Defaults to COM2 PC serial port. For use with monochrome or LCD display. Opens file filename for data logging and enables the data-logging commands. Specifies the actual measured voltage at the VREF pin (nominally 2.5V). Specifies the voltage at the COM pin. Lists command-line options. Enables MAX146-specific program features (FASTPD power-down mode). FUNCTION
Table 5. Jumper Settings on MAX147 EV Kit
JUMPER Closed JU1 Open (default) Closed (default) JU2* Open Closed (default trace) JU3 Open Closed (default trace) JU4 Open JU5* Closed (default) Open *If JU2 is open, JU5 must also be open. COM must be driven by an external source. Drive VREF with external reference. Use internal reference (not allowed with MAX147). Do not operate kit with JU3 open. Switch U3 drives COM. Enable internal reference. VREF is a 2.5V output (not allowed with MAX147). Current-sense jumper. The MAX147 draws its +3V supply through this trace. STATE FUNCTION Ties SHDN to pin 29 on the C module. Forces SHDN to float. Disable internal reference. VREF is an input.
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
MAX494
9 CH4 10 CH0 R1 R2 CH0 11 13 CH5 12 2 CH6 3 C0MCHO EXTCHO 10 CH1 9 U3A 8 IN4 R1-R8 = 1k C7-C14 = 0.01F
U7C
U7D
14
IN5
CH2 CH3
R3 R4
CH0 CH1 CH2
U7A
1
IN6 CH3 R5 CH4 CH5 CH6 CH7 C14 C13 C12 C11 C10 C9 C8 C7 COM SHDN GND
6 CH7 5
R6
U7B
7
IN7 R7 R8
VDD
C20 0.1F GND JU1 P1.2/SHDN SHDN
EXTCOMFB VDD 7 6 3 4 C17 0.1F GND R18 100
JU4 CUT HERE
C6 0.1F COM_SW 3 15 14 TEST POINTS J18-1 16 U3B J18-2 J18-3 J18-4 J18-5 R17 1M GND VDD SCLK CS DIN SSTRB DOUT SHDN COMSEL COMCHO
2 EXTCOM
U5 MAX495
BEXTCOM
2 1 U3C
GND COMSEL COMSEL = L: COM = GND COMSEL = H: COM = EXTCOM
J18-6 J18-7 J18-8 J18-9
VDD ADJUST RANGE = 2.3V TO 3.6V, 3V NOMINAL
U4 MAX666
1 SENSE VDD 2 VOUT 3 LBI 4 GND VIN 8 LB0 VSET SHDN 7 6 5
+5V
VDD CH0 C18 0.1F R14 220k DEVICE R16 100k U3: MAX393 U6: 74HCT04 U7: MAX494 +5V 12, 13 14 -- 6 U3D SUPPLY PINS GND 4, 5 7 11 VDD -- -- 4 7 8
COMCHO = L: CHO = NORMAL COMCHO = H: CHO = EXTCOM COMCHO
J18-10
1.3V
R21 1M
GND
SOCKETED
R15 180k 3 GND
U6B
4
11 GND
U6E
10
74HCT04
74HCT04
Figure 1. MAX147 EV Kit Schematic
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
VDD
U1 MAX147
CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM 1 2 3 4 5 6 7 8 9 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM SHDN VDD SCLK CS DIN SSTRB DOUT DGND AGND REFADJ VREF 20 19 18 17 16 15 14 13 12 11 CUT HERE JU3 VDD146
C5 C4 10F 0.1F SCLK CS DIN SSTRB DOUT C1 JU2 VDD 0.01F 2 3 4 5 6 7 8 9 10 REFADJ COMSEL SCLK VREF 2.5V NOMINAL R13 OPEN 1 2 3 R12 OPEN BDOUT DIN +5V SCLK C19 0.1F CS J1-37 J1-38 SCK PCS0 J1-35 J1-36 MISO MOSI R10 OPEN R11 OPEN P1.2/SHDN COMCHO C2 0.1F C3 4.7F BSSTRB BDOUT CS DIN J1-27 J1-28 J1-29 J1-30 J1-31 J1-32 J1-33 J1-34 P10/BIP/UNI P11/SCLK P12/SHDN P13/SPARF P14/SSTRB P15/DOUT P16/CS P17/DIN R9 GND J1-1 J1-2 J1-3 10k 10-PIN SIP J1-4 GND GND GND GND
+5V
+5V
J1-7 J1-8
+5V +5V
SHDN 10
U2
VDD 1 2 VIN C15 0.1F 3 4 GND VOUT
MAX872CPA
COMP 8 7 6 5 EXTVREF VREF C16 0.047F JU5
GND
DOUT
13
U6F
12 1 2 U6A DOUT 74HCT04 74HCT04 8 5 6 U6C SSTRB 74HCT04 74HCT04
BDOUT
SSTRB
9
U6D
BSSTRB
Figure 1. MAX147 EV Kit Schematic (continued)
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
1.0"
Figure 2. MAX147EV Kit Component Placement Guide--Component Side
1.0"
Figure 3. MAX147EV Kit PC Board Layout--Component Side
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
1.0"
Figure 4. MAX147EV Kit PC Board Layout--Solder Side
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MAX147 Evaluation System/Evaluation Kit
Listing 1a. Using the 68HC16 to Read the MAX147
Evaluates: MAX146/MAX147
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MAX147 Evaluation System/Evaluation Kit Evaluates: MAX146/MAX147
Listing 1b. Using the 80C32 to Read the MAX147
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
68HC16 Module
_____________________________________________68HC16 Module Component List
DESIGNATION C1, C2, C3 C4, C5 C6, C7 C8 C9 C10-C14 D1 J1 J2 J3 J4 JU1 JU2 JU3 JU4 JU5 L1 L2 LED1 R1 QTY 3 2 2 1 0 5 1 1 1 1 0 0 0 0 0 0 0 0 1 1 DESCRIPTION 1F ceramic capacitors 22F, 25V radial-lead electrolytic capacitors 22pF capacitors 0.01F capacitor Reference designator, not used 0.1F capacitors 1N4001 diode 40-pin right-angle male connector 2-circuit terminal block Right-angle printed circuit board mount, DB9 female socket Open Open Reference designator, not used Open Open Open Open Open Light-emitting diode 10M, 5% resistor DESIGNATION R2 R3, R4 R5 R6 SW1 SW2 U1 U2 U3 U4 U5 U6 U7 Y1 None None None None None QTY 1 2 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 1 DESCRIPTION 330k, 5% resistor 10k, 5% resistors 470, 5% resistor 10k SIP resistor Slide switch Momentary pushbutton switch 68HC16 C MC68HC16Z1CFC16 (132-pin plastic quad flat pack) Maxim MAX233CPP 27C256 EPROM containing monitor program 7805 regulator, TO-220 size 62256 (32K x 8) static RAM 74HCT245 bidirectional buffer Maxim MAX707CPA 32.768kHz watch crystal Rubber feet 28-pin socket for U3 20-pin socket for U6 3" x 5" printed circuit board Heatsink for U4, thermalloy # 6078
68HC16 Module
68HC16 Module ________________General Description
The 68HC16 module is an assembled and tested printed-circuit board intended for use with Maxim's highspeed serial-interface evaluation kits (EV kits). The module uses an inexpensive 8-bit implementation of Motorola's MC68HC16Z1 microcontroller (C) to collect data samples at high speed using the QSPITM interface. It requires an IBM-compatible personal computer and an external DC power supply, typically 12V DC or as specified in EV kit manual. Maxim's 68HC16 module is provided to allow customers to evaluate selected Maxim products. It is not intended to be used as a microprocessor development platform, and such use is not supported by Maxim.
68HC16 Module ________________Detailed Description
Power Input Connector J2
The 68HC16 module draws its power from a user-supplied power source connected to terminal block J2. Be sure to note the positive and negative markings on the board. A three-terminal 5V regulator allows input voltages between 8V and an absolute maximum of 20V. The 68HC16 module typically requires 200mA of input current.
68HC16 Microcontroller
U1 is Motorola's 68HC16Z1 C. Contact Motorola for C information, development, and support. Maxim EV kits use the high-speed queued serial peripheral interface (QSPI) and the internal chip-select generation. A MAX707 on the module monitors the 5V logic supply, generates the power-on reset, and produces a reset pulse whenever the reset button is pressed.
QSPI is a trademark of Motorola Corp.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.
68HC16 Module 68HC16 Module
The 68HC16 uses a phase-locked loop (PLL) to set its bus speed. Crystal Y1 is a 32.768kHz frequency reference. The internal oscillator runs 256 times faster than the external crystal. When the 68HC16 is reset, it waits for the PLL to lock before it executes any software. After the PLL locks onto the reference frequency, the software doubles the clock speed by writing to the clock synthesizer control register, selecting a bus speed of 16.78MHz. U5, the user RAM area, is a 32kbyte CMOS static RAM. The 74HCT245 octal buffer lets the 68HC16 module access an 8-bit port on the 40-pin interface connector. This memory-mapped port consists of separate read and write strobes, four chip selects, four address LSBs, and eight data bits.
Table 1. Serial Communications Port J3
PIN 1 2 3 4 5 6 7 8 9 NAME DCD RXD TXD DTR GND DSR RTS CTS None FUNCTION Handshake; hard-wired to DTR and DSR RS-232-compatible data output from 68HC16 module RS-232-compatible data input to 68HC16 module Handshake; hard-wired to DCD and DSR Signal ground connection Handshake; hard-wired to DCD and DTR Handshake; hard-wired to CTS Handshake; hard-wired to RTS Unused
Serial Communications
J3 is an RS-232 serial port, designed to be compatible with the IBM PC 9-pin serial port. Use a straightthrough DB9 male-to-female cable to connect J3 to this port. If the only available serial port has a 25-pin connector, you may use a standard 25-pin to 9-pin adapter. Table 1 shows the pinout of J3. The MAX233 is an RS-232 interface voltage level shifter with two transmitters and two receivers. It includes a built-in charge pump with internal capacitors that generates the output voltages necessary to drive RS-232 lines.
Table 2. 40-Pin Data-Connector Signals
PIN 1-4 5, 6 7, 8 9 10 11 12 13 14 15 16 17 18 19 20-26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 NAME GND VPREREG VCC RD WR 7E000 7E800 7F000 7F800 A00 A01 A02 A03 EXTD0 EXTD1-7 IC1 IC2 IC3 OC1 OC2 OC3 OC4 IC4 MISO MOSI SCK PCS0/SS CLKOUT PWMA FUNCTION Ground Unregulated input voltage +5V from on-board regulator Read strobe Write strobe Chip select for 7E000-7E7FF Chip select for 7E800-7EFFF Chip select for 7F000-7F7FF Chip select for 7F800-7FFFF Address bit 0 (LSB) Address bit 1 Address bit 2 Address bit 3 Buffered data bus 0 (LSB) Buffered data bus bits 1-7 General I/O port bit 0 (LSB) General I/O port bit 1 General I/O port bit 2 General I/O port bit 3 General I/O port bit 4 General I/O port bit 5 General I/O port bit 6 General I/O port bit 7 QSPI master-in, slave-out QSPI master-out, slave-in QSPI serial clock QSPI chip-select output System clock output Pulse-width-modulator output
40-Pin Data Connector J1
The 20 x 2 pin header connects the 68HC16 module to a Maxim EV kit. Table 2 lists the function of each pin. Note that 68HC16 object code is not compatible with 68HC11 object code. Use the 68HC16 module only with those modules that are designed to support it, and only download code that is targeted for the 68HC16 module. Downloading incorrect object code into the 68HC16 module will have unpredictable results.
Address Ranges
The 68HC16 C generates various enable signals for different address ranges. The ROM and RAM enable signals are fed directly to the respective chips. Several additional signals (J1.11-J1.14) are available on the data connector to be used by Maxim EV kits. Table 3 outlines the address ranges for each of the elements found on the 68HC16 module, and Table 4 is a truth table that describes the logic for each of the 68HC16's chip-select outputs. Because the addresses are not completely decoded, the boot ROM and user RAM have shadows.
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68HC16 Module
Table 3. 68HC16 Module Memory Map (all address values are in 20-bit hex)
PIN 00000-07FFF 08000-0FFFF 10000-17FFF 18000-1FFFF 20000-203FF 20400-7DFFF 7E000-7E7FF 7E800-7EFFF 7F000-7F7FF 7F800-7FFFF 80000-F7FFF F8000-FF6FF FF700-FF73F FF740-FF8FF FF900-FF93F FF940-FF9FF FFA00-FFA7F FFA80-FFAFF FFB00-FFB07 FFB08-FFBFF FFC00-FFDFF FFE00-FFFFF FUNCTION Boot ROM (U3, strobed by CSBOOT) Shadow of boot ROM User RAM (U5, strobed by CS0 and CS2) Shadow of user RAM Internal standby RAM; 1kbyte Unused External chip select (J1 pin 11) (CS7) External chip select (J1 pin 12) (CS8) External chip select (J1 pin 13) (CS9) External chip select (J1 pin 14) (CS10) Not accessed by the 68HC16 Unused 68HC16's built-in ADC (not used) Unused General-purpose timer module (GPT) Unused System integration module (SIM) Unused Internal standby RAM (SRAM) control registers Unused Queued serial module (QSM) Unused
Boot ROM
The boot ROM, U3, is configured as an 8-bit memory device. Resistor R4 pulls data bit 0 low during system reset, forcing the C to fetch instructions using only the upper eight data bits. The boot ROM checks the system and waits for commands from the host. Refer to the EV kit manual for specific start-up procedures.
68HC16 Module
Software
All software is supplied on a disk with the EV kit. Instructions for operating the software are included in the EV kit manual. Refer to the EV kit manual for more information.
_______68HC16 Module Self Check
To test the 68HC16 module's integrity, connect the power supply to the power terminals (J2). Do not connect anything to J1 or J3. Slide the power switch SW1 to the "ON" position. The LED will light up, and will flash within 5 seconds. If the LED flashes with a 50%-on/50%-off duty cycle, then it passed its self check. Note that this test does not exercise the RS-232 port or the EV kit 40-pin interface, but it does confirm that the power supply, microprocessor, ROM, and RAM passed the self test. If the LED flashes with a 10%-on/90%-off duty cycle, then it failed its self check. Most likely, the RAM chip (U5) is bad. If the LED remains on and does not flash, then the problem is either U3 (the EPROM), U1 (the microprocessor), U4 (the regulator), the MAX707 reset generator, or the power supply. Use a voltmeter to verify that the power supplies are good. Check the power-supply input and the +5V output from the regulator. Use an oscilloscope to see if the 32.768kHz reference oscillator is running.
_______________________________________________________________________________________
3
68HC16 Module 68HC16 Module
Table 4. 68HC16 Chip-Select Outputs Truth Table
ADDRESS RANGE 0xxxx read 1xxxx read 1xxxx write 7E0xx read 7E0xx write 7E8xx read 7E8xx write 7F0xx read 7F0xx write 7F8xx read 7F8xx write CSBOOT L H H H H H H H H H H CS0 H H L H H H H H H H H CS1 H H H L H L H L H L H CS2 H L H H H H H H H H H CS5 H H H H L H L H L H L CS6 H H H L L L L L L L L CS7 H H H L L H H H H H H CS8 H H H H H L L H H H H CS9 H H H H H H H L L H H CS10 H H H H H H H H H L L
VCC
R5 470
LED1 PWMB
GROUND UNREGULATED 7V TO 20V REGULATED +5V INTEL COMPATIBLE READ/WRITE STROBES CHIP SELECTS LOW ADDRESS BITS
VCC
C13 0.1F GND
CS6/IOBUFFER CS1/RDIO D08 D09 D10 D11 D12 D13 D14 D15
19 1 2 3 4 5 6 7 8 9
OE DIR A1 A2 A3 A4 A5 A6 A7 A8
U6 74HCT245
B1 B2 B3 B4 B5 B6 B7 B8
18 17 16 15 14 13 12 11
EXTD0 EXTD1 EXTD2 EXTD3 EXTD4 EXTD5 EXTD6 EXTD7
8-BIT BUFFERED BIDIRECTIONAL DATA BUS
8-BIT GENERAL I/O PORT
HIGH-SPEED SERIAL INTERFACE (QSM/QSPI) VCC
1 2 3 4
GND GND VPREREG VCC CS1/RDIO CS7/7E000 CS9/7F000 A00 A02 EXTD0 EXTD2 EXTD4 EXTD6 IC1 IC3 OC2 OC4 MISO SCK CLKOUT
J1-1 J1-3 J1-5 J1-7 J1-9 J1-11 J1-13 J1-15 J1-17 J1-19 J1-21 J1-23 J1-25 J1-27 J1-29 J1-31 J1-33 J1-35 J1-37 J1-39
J1-2 J1-4 J1-6 J1-8 J1-10 J1-12 J1-14 J1-16 J1-18 J1-20 J1-22 J1-24 J1-26 J1-28 J1-30 J1-32 J1-34 J1-36 J1-38 J1-40
GND GND VPREREG VCC CS5/WRIO CS8/7E800 CS10/7F800 A01 A03 EXTD1 EXTD3 EXTD5 EXTD7 IC2 OC1 OC3 IC4 MOSI PCSO/SS PWMA
TSTME BKPT/DSCLK BKPT/DSCLK HALT BERR MODCLK DSACK1 DSACK0 IRQ7 DS GND GND RESET VCC J4-1 J4-3 J4-5 J4-7 J4-9 J4-2 J4-4 J4-6 J4-8 J4-10 BERR BKPT/DSCLK FREEZE IPIPE1/DSI IPIPE0/DS0
R6 10k SIP RESISTOR
5 6 7 8 9 10
Figure 1. 68HC16 Module Schematic
4 _______________________________________________________________________________________
68HC16 Module 68HC16 Module
C14 0.1F C8 0.01F MISO MOSI SCK PCSO/SS PWMA PWMB VSSE VCC IC1 IC2 IC3 OC1 OC2 VSSI VDDI OC3 OC4 IC4 VCC CS10/7F800 CS9/7F000 CS8/7E800 CS7/7E000 CS6/IOBUFFER CS2/RDRAM CS1/RDIO VSSE
A01 A02 VCC VSSE A03 A04 A05 A06 A07 A08 VSSI A09 A10 A11 A12 A13 A14
VCC
VSSE
VRL ADA6 ADA7 VSTBY XTAL VDDSYN EXTAL VSSI VDDI XFC VDDE VSSE CLKOUT FREEZE/QUOT TSTME/TSC BKPT/DSCLK IPIPE0/DS0 IPIPE1/DS1 RESET HALT BERR IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 IRQ2 IRQ1 MODCLK R/W SIZ1 SIZ0 VSSE
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
RXD PCS3 PCS2 PCS1 PCS0/SS SCK MOSI MISO VSSE VDDE IC1 IC2 IC3 OC1 OC2 VSSI VDDI OC3 OC4 IC4/OC5 PAI PWMA PWMB PCLK VSSE VDDE ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 BGACK BG TXD ADDR1 ADDR2 VDDE VSSE ADDR3 ADDR4 ADDR5 ADDR6 ADDR7 ADDR8 VSSI ADDR9 ADDR10 ADDR11 ADDR12 ADDR13 ADDR14 ADDR15 ADDR16 ADDR17 ADDR18 VDDE VSSE VDDA VSSA ADA0 ADA1 ADA2 ADA3 ADA4 ADA5 VRH
116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117
RXD TXD
U1 MOTOROLA MC68HC16Z1CFC16
BR FC2 FC1 VDDE VSSE FCO CSBOOT DATA0 DATA1 DATA2 DATA3 VSSI DATA4 DATA5 DATA6 DATA7 DATA8 DATA9 VDDE VSSE DATA10 DATA11 DATA12 DATA13 DATA14 DATA15 ADDRO DSACK0 DSACK1 AVEC DS AS VDDE
CSO/WRRAM CS5/WRIO VCC VSSE CSBOOT/RDROM DOO
VSSI
DO8 DO9 VCC VSSE D10 D11 D12 D13 D14 D15 AOO DSACKO DSACK1 DS VCC
JU4 VSSE VCC
1
XTAL
EXTAL VSSI VDDI
VCC VSSE CLKOUT FREEZE TSTME BKPT/DSCLK IPIPEO/DS0 IPIPE1/DSI RESET HALT BERR IRQ7
1
2 1
L2 10H OPTIONAL
C3 1F 2 20V VSSI
C10 0.1F
Figure 1. 68HC16 Module Schematic (continued)
_______________________________________________________________________________________ 5
MODCLK
VSSE
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83
2 VSTBY
68HC16 Module 68HC16 Module
R2 330k VCC
2 2
2
1 1
1
C7 22pF
XTAL R1 10M
7
J3-8 CTS J3-7 RTS T1OUT 5 T2OUT 18 R1IN 4 R2IN 19 C2+ 15 C2+ 10 C216 C211
VCC TXD VCC GND
2 2 T1IN 1 T2IN 3 R1OUT 20 R2OUT 5
2 32.768kHz 2 1 1
Y1
C6 22pF
EXTAL
J3-2 RXD
VCC SW2 RESET
1 2 1
RXD
U7 MAX707
PFO 6 N.C. MR 8 RESET 4 7 RESET PFI GND
3
J3-3 TXD GND J3-4 DTR J3-6 DSR J3-1 DCD J3-5 GND
J2 + -
1 2
RESET
C1+ C112 V17 V14 V+
13
8
U2 MAX233
GND
9
GND
6
SW1 POWER
1 2
D1 1N4001 VPREREG
2
JU5
1
GND L1 10H
VSSE
J3-9 RI
1 1
U4 78M05
IN OUT GND
2
3 1
VCC VCC C4 2 22F 25V
1 1 2
2 1 2
C1 OPTIONAL 1F 20V JU3
C2 1F 20V
VDDI
C5 2 22F 20V GND
VSSI
VSSE
1
2
D00
1
R4 10k
2
RESET A(00:18)
D09
1
R3 10k
2
RESET
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14
10 9 8 7 6 5 4 3 25 24 21 23 2 26 1 20 22 27
A0 A1 U5 A2 62256 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 CS OE WE
VCC
A(00:18)
I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7
11 12 13 15 16 17 18 19
D08 D09 D10 D11 D12 D13 D14 D15
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13
10 9 8 7 6 5 4 3 25 24 21 23 2 26 27 1 22 20
C12 0.1F GND
2
A0 A1 U3 A2 27C256 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 VPP OE CE
DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7
11 12 13 15 16 17 18 19
D08 D09 D10 D11 D12 D13 D14 D15
D(00:15)
VCC
C11 0.1F GND
GND CS2/RDRAM CS0/WRRAM
VCC CSBOOT/RDROM A14
1 3
VCC 32k x 8-BIT CMOS EPROM
32k x 8-BIT HIGH-SPEED CMOS STATIC RAM
Figure 1. 68HC16 Module Schematic (continued)
6 _______________________________________________________________________________________
D(00:15)
68HC16 Module 68HC16 Module
Figure 2. 68HC16 Module Component Placement Guide
_______________________________________________________________________________________
7
68HC16 Module 68HC16 Module
Figure 3. 68HC16 Module PC Board Layout--Component Side
8 _______________________________________________________________________________________
68HC16 Module 68HC16 Module
Figure 4. 68HC16 Module PC Board Layout--Solder Side
_______________________________________________________________________________________
9
80C32 Module
____80C32 Module Component List
DESIGNATION C1, C2 C4, C5, C6, C7, C8, C9, C10, C11, C12 C3, C13, C14 D1 J1 J2 R1 RS1 SW1 SW2 IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 Y1 None None None None QTY 2 9 DESCRIPTION 15pF ceramic capacitors 0.1F, 50V ceramic capacitors 22F, 16V radial electrolytic capacitors 1N4001 diode 40-pin right-angle male connector DB9 right-angle socket 620 resistor 10k 10-pin, 9-resistor SIP Power switch Reset switch 80C32 MAX233CPP 27C64 74HCT573 74HCT139 74HCT08 74HCT245 62256 78M05 MAX707CPA 11.059MHz crystal 2-pin power connector 28-pin 600-mil socket for IC3 (the EPROM) Rubber feet 3.00" x 5.50" PC board
address decoding logic. A 40-pin connector mates with a connector found on Maxim EV kits designed to interface with the 80C32 module. The module is connected to an IBM-compatible personal computer over a serial communications port. Software provided with each EV kit runs on the computer and controls the unit consisting of the 80C32 module and EV kit. The program uses a routine stored in the 27C64 EPROM to download special 80C32 code for each kit. The downloaded code controls the EV kit and, together with the program running on the personal computer, displays the output data. The board operates from a single 8V to 22V supply. Both the pre-regulated and regulated +5V levels are available to the EV kit through the 40-pin connector.
80C32 Module
3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1
80C32 Module Power Supply
The Maxim 80C32 module requires an input of 8V to 22V for normal operation. An on-board 78M05 power regulator supplies the 5V required for the logic on the module, and any 5V requirements for the EV kit attached to the 40-pin connector. The pre-regulated voltage is also available on the data connector. The source must be capable of supplying 100mA for the module and meeting the load requirements of the EV kit.
Microprocessor Supervisor
A MAX707 on the module monitors the 5V logic supply, generates the power-on reset, and produces a reset pulse whenever the reset button is pressed. A watchdog function was not included because they frequently interfere while debugging programs, and debugging is a prime function of this board.
80C32 Microcontroller
______________________80C32 Module
80C32 Module General Description
The Maxim 80C32 microcontroller (C) module is intended for use with this and other Maxim evaluation kits (EV kits). It contains the 80C32 C, RS-232 interface, 8kbytes of EPROM, 32kbytes of static RAM, and
The 80C32 is a member of the popular Intel 8051 family of Cs. It is a low-power CMOS version that requires external ROM for program storage, 256 bytes of internal RAM, and four 8-bit I/O ports. Three of the ports are required by the system for serial communications and memory control. The fourth port (P1) is available through the data connector.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.
80C32 Module 80C32 Module
The 80C32 communicates with the PC over a serial RS232 link. A MAX233 acts as a level shifter between the 15V RS-232 signals and the TTL levels of the 80C32. The MAX233 also generates the output voltages necessary to drive RS-232 lines. Port 0 (pins 32-39) of the 80C32 multiplexes the lower eight bits of memory address and the eight bits of read/write data. The lower eight bits of address data are latched during each I/O cycle by the 74HCT573 octal latch. The latch is controlled by the address latch enable (ALE) signal of the 80C32. Port 2 (pins 21-28) of the 80C32 supplies the upper eight bits of address information. The port 3 pins (10-17) provide several unrelated functions. Pins 10 and 11 are used as the receive data (RxD) and transmit data (TxD) pins of the RS-232 link. Pins 16 and 17 act as the write (WR) and read (RD) control signals for the data I/O cycles. Four other pins are configured as interrupt and timer controls, but are not used on this board.
Address Ranges
Logic on the module board generates various enable signals for different address ranges. The ROM and RAM enable signals are fed directly to the respective chips. Several additional signals (CS0-CS3) are available on the data connector to be used by Maxim EV kits. Table 1 outlines the address range for each of the elements found on the 80C32 module. Table 1. Address Ranges in Hexadecimal
ADDRESS RANGE (HEX) 0000 4000 C000 D000 E000 F000 3FFF BFFF CFFF DFFF EFFF FFFF ENABLE SIGNAL ROM RAM CS0 CS1 CS2 CS3
Data I/O Connector
A 40-pin connector mounted on the edge of the printed circuit board provides connection between the C module and other Maxim EV kits. Both power and digital signals are transferred via the connector. To join the module board with an EV kit, carefully align and insert the pins on the connector with the mating 40-pin female connector of the kit. The pin functions are listed in Table 2. Table 2. I/O Connector Pin Functions
PIN 1-4 5, 6 7, 8 9 10 11 12 13 14 15-18 19-26 27-34 35-40 FUNCTION Ground Pre-regulator input Regulated +5V RD WR CS0 CS1 CS2 CS3 ADDR0-ADDR3 DB0-DB7 P1.0-P1.7 Reserved DESCRIPTION
Memory
The board has a 27C64 EPROM containing code for initializing the 80C32 and downloading additional program code to the 62256 RAM. After a reset, the EPROM resident code initializes the 80C32, determines the address range of the RAM, sets the RS-232 baud rate to 1200, and waits for communications from the PC. Receiving any character will prompt the program to send an initial banner that includes the program name, revision level, and boundaries of the on-board RAM. The 62256 CMOS (32kbyte) static RAM is used to hold program code for the various Maxim EV kits that use the 80C32 module as the controller. Programs are transferred from disk to the RAM using software running on a personal computer, such as MAXLOAD or other programs provided with Maxim EV kits. Programs written to execute from this RAM start at 4000 (HEX) and are typically less than 4kbytes long. The remaining RAM is available for data storage.
Read strobe Write strobe Address C000-CFFF Address D000-DFFF Address E000-EFFF Address F000-FFFF Lowest 4 bits of address 8-bit data bus 8 bits of port 1
2
_______________________________________________________________________________________
80C32 Module
Software Architecture
Software for EV kits using the Maxim 80C32 module is divided into three elements: the interface program running on an IBM-compatible PC, a module program located in EPROM, and a program supplied on disk that is transferred to the RAM located on the module. Immediately following transmission of the logon banner, the program runs a checker routine for the on-board 256kbit static RAM. The RAM is filled with several patterns and then read to verify that each pattern has been retained. A pass or fail indication is displayed on the personal computer after each pass. EV kit software requires proper operation of the RAM. Do not attempt to use the board if any of the RAM checks fail. Two other programs for the EV kits are provided on a floppy disk shipped with each kit. One program acts as the user interface and transmits commands to the 80C32 module. The other is an 80C32 application program that executes from the RAM located on the module. The procedure for loading the programs varies with each kit, so follow the instructions provided.
80C32 Module
EPROM Resident Program
The EPROM resident program initializes the 80C32, establishes communications over the RS-232 link, verifies the static RAM, and downloads other programs. Its operation starts on power-up and whenever the reset button is pressed. After reset, the program waits indefinitely to receive a character over the RS232 port. When the first character is received, a logon banner identifying the module and firmware revision is transmitted.
Figure 1. 80C32 Module Component Placement Guide (x1)
_______________________________________________________________________________________
3
80C32 Module 80C32 Module
34 ALL D9 MNEMONICS REFER TO THE HOST (DTE)
5 1 4 6 GND
P1.0-P1.7 27-34 27
DCD DTR DSR
2 3 7 8
TXD RXD RTS CTS
MAX233A U2 +5V 2 +5V 5 T1 2 OUT T1IN 18 T2 1 OUT T2IN 3 4 R1 R1 19 R2IN R2OUT 20 OUT 11 IN 8 C1+ C2+ 15 13 C1C2+ 10 V- 12 C216 17 VC214 GND GNDV+
6 9
1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 9
P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RXD TXD -INT0 -INT1 T0 T1 -WR -RD RST
AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 ALE -EA A15 A14 A13 A12 A11 A10 A9 A8
39 38 37 36 35 34 33 32 30 31 28 27 26 25 24 23 22 21
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
11 21 Q1 3 D1 4 74HCT 5 573 6 U4 7 D 8 9 D8 Q8
MAX707 +5V U10 1 MR RESET 2 RESET V SW1 3 CC GND N.C. RESET 4 PFO PFI
8 7 6 5
XTAL2 29 XTAL1 -PSEN C2 XX1 11.059MHz 1 U6 HCT08 27pF 3 2 +5V 4 U6 HCT08 6 +5V 12 5 19 11 13 U6 HCT08
C1 27pF18
15 14 13 12 11 10 9 8
19 0 0 18 1 1 17 2 2 16 3 3 15 4 4 14 5 5 13 6 6 12 7 7 8 9 10 11 12 13
10 9 8 7 6 5 4 3 25 24 21 23 2 26 22 20
A0 O0 A1 O1 A2 O2 A3 O3 A4 O4 A5 O5 A6 O6 A7 O7 A8 27C64 A9 U3 A10 A11 VPP A12 N.C./A13 PCM C E
11 12 13 15 16 17 18 19
+5V 1 27
14 2 A0 0 3 A1 U5 1 15 HCT139 2 1 EN 3
4 5 6 7
9 U6 HCT08 8 10
Figure 2. 80C32 Module Schematic
4
_______________________________________________________________________________________
80C32 Module 80C32 Module
+5V U8 62256 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 10 9 8 7 6 5 4 3 25 24 21 23 2 26 1 20 22 27 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 -CS -OE -WR I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 11 12 13 15 16 17 18 19 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 RS1 1 19 2 DIR EN B1 3 A1 4 74HCT 5 /245 6 U7 7 H 8 9 A8 B8 18 17 16 15 14 13 12 11 10k
0 1 2 3
ADDR0-4 15-18
DB00-DB07 19-26
12 13
14 A0 13 A1
12 0 11 1 10 LS139 2 U5 15 9 EN 3
-CS0 - -CS3 11-14 -RD 9 -WR 10
RESERVED 35-40 +5V +5V 7-8 V++ 5-6 SW2 POWER SWITCH VIN POWER CONNECTOR C14 47F GND GND 1-4
POWER LED
R1 620
+
C4-C12 0.1F
+
78M05 U9 VOUT VIN
C3 47F
C13 47F
Figure 2. 80C32 Module Schematic (continued)
_______________________________________________________________________________________
5
80C32 Module 80C32 Module
Figure 3. 80C32 Module Component-Side Layout (x1) Figure 4. 80C32 Module Solder-Side Layout (x1)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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