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19-0677; Rev 0; 11/06
USB-to-COM Port Adapter Board User Guide
General Description
The USBTO232 is an adapter board that converts a PC's USB port into a standard COM port. A COM port is also known as the standard serial port that uses Recommended Standard 232 (RS-232). The USBTO232 is included with selected Maxim EV kits and EV systems that were originally designed for the PC COM port and later updated to also support the USB port. Data sheets for EV kits and EV systems that can use the USBTO232 have been updated to reflect compatibility and also provide ordering information. Use of the USBTO232 in applications other than those EV kits specified by Maxim is not supported. Important: Before using the USBTO232, see the Quick Start section of this data sheet to correctly install the USB driver for the appropriate Windows (R) operating system.
Windows is a registered trademark of Microsoft Corp.
Features
o USB Powered o USB Driver for Windows 98SE/2000/XP Operating Systems o USB and I/O Power LED Indicators o Two GPIO LED Indicators o USB Cable Included o 8-Pin Signal Header o Proven PCB Layout o Fully Assembled and Tested
USBTO232
Ordering Information
PART PC INTERFACE OPERATING SYSTEMS SUPPORTED
USBTO232+ USB Windows 98SE/2000/XP + Denotes lead-free and RoHS compliance.
Component List
DESIGNATION C1 QTY 1 DESCRIPTION 0.01F 10%, 50V X7R ceramic capacitor (0603) TDK C1608X7R1H103K 47pF 5%, 50V COG ceramic capacitors (0603) TDK C1608C0G1H470J 0.1F 10%, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104K 4.7F 10%, 6.3V X5R ceramic capacitor (0603) TDK C1608X5R0J475K 1F 10%, 6.3V X5R ceramic capacitor (0603) TDK C1608X5R0J105K Red LED (0603) Panasonic LNJ208R8ARA Green LED (0603) Stanley Electric BG1111C-TR Panasonic LNJ314G8TRA 40 @ 100MHz, 1.5A ferrite bead (0805) Steward MI0805K400R-10 8-pin header 3-pin headers SUPPLIER TDK DESIGNATION P1 QTY 1 DESCRIPTION USB type B right-angle female receptacle connector Assmann AU-Y1007-R Short DB9 right-angle male receptacle connector (without cable-locking screws) 270 5% resistors (0603) (use lead-free parts only) USB-to-UART converter FTDI FT232RL (28-pin SSOP) MAX213EEAI+ (28-pin SSOP) Shunts USBTO232+ PCB USB high-speed A-to-B 6ft cable
C2, C3
2
P2
1
C4-C8, C11, C12
7
R1, R2 U1
2 1 1 3 1 1
C9
1
U2 -- -- --
C10
1
D1
1
Component Supplier
PHONE 847-803-6100 WEBSITE www.component.tdk.com
D2
1
FB1 H1 JU1, JU2, JU3
1 1 3
Note: Indicate the Maxim EV kit that you are using when contacting this component supplier.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
USB-to-COM Port Adapter Board User Guide USBTO232
Quick Start
The following instructions are for installing USB drivers and the EV kit software. Once the USB drivers and EV kit software have been installed, refer to the Quick Start section of the appropriate EV kit data sheet for EV kitspecific instructions. 7) Go to the appropriate USB Driver Installation section in this data sheet for the version of Windows you are using and return to step 8 when finished. For example, if you are using Windows XP, go to the Windows XP USB Driver Installation section. Windows XP: Page 3 Windows 2000: Page 11 Windows 98SE: Page 25 8) Connect the USBTO232 board to the EV kit (or EV system) by connecting the male DB9 connector on the USBTO232 board to the female DB9 connector on the EV kit. 9) Refer to the Quick Start section of the appropriate EV kit data sheet for further EV kit-specific instructions.
Recommended Equipment
* USBTO232 board (USB cable included) * Maxim EV kit (or EV system) with a COM port PC connection * Corresponding EV kit data sheet * User-supplied PC with a USB port Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows 98SE/2000/XP operating system.
Detailed Description of Hardware
The USBTO232 is an adapter board that converts a PC's USB port into a standard COM port. The USBTO232 board has three configurable jumpers: JU1, JU2, and JU3. Jumper JU1 is the I/O supply selection (see Table 1), jumper JU2 is the USB power-supply indicator (see Table 2), and jumper JU3 is the 3.3V power-supply indicator (see Table 3).
Procedure
1) Visit the Maxim website (www.maxim-ic.com/evkitsoftware) to download the latest version of the EV kit software that supports USB. Save the EV kit software to a temporary folder and uncompress the file, if it is a .zip file. 2) Install the EV kit software on your computer by running the INSTALL.EXE program inside the temporary folder. The program files are copied to C:\Program Files\MAXxxxxx and icons are created in the Windows Start | Programs menu. 3) Uncompress the USB driver file copied into C:\Program Files\MAXxxxxx after the software is installed. If you are using Windows 98SE, uncompress the USB_Driver_98_ME_V1.09.zip file. If you are using Windows 2000/XP, uncompress the USB_Driver_XP_2K_V2.00.zip file. Uncompress the contents of the .zip file into C:\Program Files\MAXxxxxx. 4) Verify that the following USBTO232 jumpers are in the default positions: JU1: (1-2) JU2: (2-3) JU3: (2-3) 5) Connect the included USB cable from the PC's USB port (Type A) to the Type B USB connector on the USBTO232 board. 6) Verify that the red VCC power LED (D1) lights up. Also verify that the green VCCIO power LED (D2) lights up.
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Table 1. I/O Supply Selection (VCCIO)
JUMPER JU1 SHUNT POSITION 1-2* 2-3 DESCRIPTION VCCIO = VCC = 5V VCCIO = VCC30 = 3.3V
*Default position.
Table 2. USB Power-Supply Indicator (VCC-D1)
JUMPER SHUNT POSITION 1-2 JU2 2-3* DESCRIPTION General-purpose LED connected to CBUS0 Indicates USB power present when red LED (D1) is lit
*Default position.
Table 3. 3.3V Power-Supply Indicator (VCC30-D2)
JUMPER SHUNT POSITION 1-2 JU3 2-3* DESCRIPTION General-purpose LED connected to CBUS1 Indicates regulated 3.3V power present when green LED (D2) is lit
*Default position. _______________________________________________________________________________________
USB-to-COM Port Adapter Board User Guide
Windows XP USB Driver Installation
1) Once the USBTO232 board is connected to the PC for the first time in Windows XP, a Found New Hardware Wizard | Welcome window appears, as shown in Figure 1. Choose the No, not this time selection and press the Next button to get started. If you do not see a window that is similar to the one described above after 30 seconds, remove the USB cable from the USBTO232 board and reconnect it. Administrator privileges are required to install the USB device driver on Windows 2000/XP.
USBTO232
Figure 1. Windows XP: Found New Hardware Wizard |Welcome Window
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USB-to-COM Port Adapter Board User Guide USBTO232
2) A Found New Hardware Wizard | FTDI FT8U2XX Device window (Figure 2) appears next. This window asks What do you want the wizard to do?. Choose the Install from a list or specific location (Advanced) option and press the Next button.
Figure 2. Windows XP: Found New Hardware Wizard | FTDI FT8U2XX Device Window
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USB-to-COM Port Adapter Board User Guide
3) At the Found New Hardware Wizard | Search Options window (Figure 3), choose the Search for the best driver in these locations option and check the Include this location in the search checkbox. Press the Browse button and navigate to the path: C:\Program Files\MAXxxxxx (where xxxxx represents the Maxim IC part number on the EV kit being evaluated). Press the Next button when finished.
USBTO232
Figure 3. Windows XP: Found New Hardware Wizard | Search Options Window
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USB-to-COM Port Adapter Board User Guide USBTO232
4) The Found New Hardware Wizard | Complete window appears (Figure 4). Press the Finish button.
Figure 4. Windows XP: Found New Hardware Wizard | Complete Window
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USB-to-COM Port Adapter Board User Guide
5) A Found New Hardware Wizard | Welcome window appears again (Figure 5). Choose the No, not this time selection and press the Next button.
USBTO232
Figure 5. Windows XP: Found New Hardware Wizard | Welcome Window
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USB-to-COM Port Adapter Board User Guide USBTO232
6) The next window is the Found New Hardware Wizard | USB Serial Port window (Figure 6). This window asks What do you want the wizard to do?. Choose the Install from a list or specific location (Advanced) option and press the Next button.
Figure 6. Windows XP: Found New Hardware Wizard | USB Serial Port Window
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USB-to-COM Port Adapter Board User Guide
7) At the Found New Hardware Wizard | Search Options window (Figure 7), choose the Search for the best driver in these locations option and check the Include this location in the search checkbox. Press the Browse button and navigate to the path: C:\Program Files\MAXxxxxx. Press the Next button when finished.
USBTO232
Figure 7. Windows XP: Found New Hardware Wizard | Search Options Window
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USB-to-COM Port Adapter Board User Guide USBTO232
8) The next window is the Found New Hardware Wizard | Complete window (Figure 8). Press the Finish button. 9) When finished, return to step 8 of the USBTO232 Quick Start section.
Figure 8. Windows XP: Found New Hardware Wizard | Complete Window
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USB-to-COM Port Adapter Board User Guide
Windows 2000 USB Driver Installation
1) Once the USBTO232 board is connected to the PC for the first time in Windows 2000, a Found New Hardware window appears, as shown in Figure 9.
USBTO232
Figure 9. Windows 2000: Found New Hardware Window
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USB-to-COM Port Adapter Board User Guide USBTO232
2) A Found New Hardware Wizard | Welcome window then appears (Figure 10). Press the Next button.
Figure 10. Windows 2000: Found New Hardware Wizard | Welcome Window
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USB-to-COM Port Adapter Board User Guide
3) At the Found New Hardware Wizard | Install Hardware Device Drivers window (Figure 11), choose Search for a suitable driver for my device (recommended) and press the Next button when finished.
USBTO232
Figure 11. Windows 2000: Found New Hardware Wizard | Install Hardware Device Drivers Window
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USB-to-COM Port Adapter Board User Guide USBTO232
4) The Found New Hardware Wizard | Locate Driver Files window appears next (Figure 12). Check the Specify a location checkbox and press the Next button when finished.
Figure 12. Windows 2000: Found New Hardware Wizard | Locate Driver Files Window
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USB-to-COM Port Adapter Board User Guide
5) The next window is the Found New Hardware Wizard | Path window (Figure 13). Press the Browse button and choose the path C:\Program Files\MAXxxxxx. Press the OK button when finished.
USBTO232
Figure 13. Windows 2000: Found New Hardware Wizard | Path Window
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USB-to-COM Port Adapter Board User Guide USBTO232
6) The Found New Hardware Wizard | Driver Files Search Results window is shown in Figure 14. Press the Next button after the wizard finds the driver.
Figure 14. Windows 2000: Found New Hardware Wizard | Driver Files Search Results Window
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USB-to-COM Port Adapter Board User Guide
7) At the Found New Hardware Wizard | Complete window (Figure 15), press the Finish button.
USBTO232
Figure 15. Windows 2000: Found New Hardware Wizard | Complete Window
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USB-to-COM Port Adapter Board User Guide USBTO232
8) A Found New Hardware window appears for the USB Serial Port, as shown in Figure 16.
Figure 16. Windows 2000: Found New Hardware Window
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USB-to-COM Port Adapter Board User Guide
9) When the Found New Hardware Wizard | Welcome window appears (Figure 17), press the Next button.
USBTO232
Figure 17. Windows 2000: Found New Hardware Wizard | Welcome Window
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USB-to-COM Port Adapter Board User Guide USBTO232
10) At the Found New Hardware Wizard | Install Hardware Device Drivers window (Figure 18), choose Search for a suitable driver for my device (recommended) and press the Next button when finished.
Figure 18. Windows 2000: Found New Hardware Wizard | Install Hardware Device Drivers Window
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USB-to-COM Port Adapter Board User Guide
11) The Found New Hardware Wizard | Locate Driver Files window (Figure 19) appears. Check the Specify a location checkbox and press the Next button when finished.
USBTO232
Figure 19. Windows 2000: Found New Hardware Wizard | Locate Driver Files Window
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USB-to-COM Port Adapter Board User Guide USBTO232
12) At the Found New Hardware Wizard | Path window (Figure 20), press the Browse button and choose the path C:\Program Files\MAXxxxxx. Press the OK button when finished.
Figure 20. Windows 2000: Found New Hardware Wizard | Path Window
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USB-to-COM Port Adapter Board User Guide
13) The Found New Hardware Wizard | Driver Files Search Results window ( Figure 21) appears. Press the Next button after the wizard finds the driver.
USBTO232
Figure 21. Windows 2000: Found New Hardware Wizard | Driver Files Search Results Window
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USB-to-COM Port Adapter Board User Guide USBTO232
14) The next window is the Found New Hardware Wizard | Complete window (Figure 22). Press the Finish button. 15) When finished, return to step 8 of the USBTO232 Quick Start section.
Figure 22. Windows 2000: Found New Hardware Wizard | Complete Window
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USB-to-COM Port Adapter Board User Guide
Windows 98SE USB Driver Installation
1) Once the USBTO232 board is connected to the PC for the first time in Windows 98SE, an Add New Hardware Wizard | Start window appears, as shown in Figure 23. Press the Next button to get started.
USBTO232
Figure 23. Windows 98SE: Add New Hardware Wizard | Start Window
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USB-to-COM Port Adapter Board User Guide USBTO232
2) An Add New Hardware Wizard | Options window appears next (Figure 24). Choose the Search for the best driver for your device (Recommended) option and press the Next button when finished.
Figure 24. Windows 98SE: Add New Hardware Wizard | Options Window
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USB-to-COM Port Adapter Board User Guide
3) At the Add New Hardware Wizard | Specify Location window (Figure 25), check the Specify a location checkbox and press the Browse button. Choose the path C:\Program Files\MAXxxxxx\ R10906 (where xxxxx represents the Maxim IC part number on the EV kit being evaluated). Press the Next button when finished.
USBTO232
Figure 25. Windows 98SE: Add New Hardware Wizard | Specify Location Window
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USB-to-COM Port Adapter Board User Guide USBTO232
4) The Add New Hardware Wizard | Search window appears (Figure 26). Press the Next button once the driver has been located.
Figure 26. Windows 98SE: Add New Hardware Wizard | Search Window
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USB-to-COM Port Adapter Board User Guide
5) The next window is the Add New Hardware Wizard | Complete window (Figure 27). Press the Finish button to complete the driver installation. 6) When finished, return to step 8 of the USBTO232 Quick Start section.
USBTO232
Figure 27. Windows 98SE: Add New Hardware Wizard | Complete Window
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USBTO232
Figure 28. USBTO232 Schematic
USB-to-COM Port Adapter Board User Guide
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P2 VCC VCC FB1 TXDATA R3IN RXDATA TXDATA DTR R3OUT SHDN VCC 5 R2OUT U2 MAX213 R4OUT T4IN T3IN R5OUT R5IN VC2C110 GND C2+ 19 18 17 16 15 C7 0.1F 14 C6 0.1F 20 21 DTR# DCD# RI DCD P2-9 22 RI# R4IN 23 RI DSR RTS CTS P2-6 P2-7 P2-8 T2IN T1IN R1OUT R1IN VCC EN 6 7 8 H1 VCC HEADER 8 PIN H1-1 C12 0.1F CBUS0 H1-2 CBUS1 OSCO CBUS1 CBUS2 CBUS4 CBUS2 CBUS3 DCD# CBUS3 VCC30 3V3OUT CTS# RESET# H1-7 H1-8 D1 1 CBUS0 C9 4.7F 23 JU2 DTR# AGND GND GND GND TEST 25 7 18 21 26 2 DTR# RESET# 19 11 CTS# C11 0.1F 17 H1-6 14 H1-5 VCC VCC30 RI# 13 H1-4 C5 0.1F H1-3 22 13 V+ 12 C1+ C4 0.1F C10 1F CBUS0 28 12 10 6 23 11 VCC DSR VCC 20 9 24 P2-5 25 SLEEP# P2-4 26 CTS# CTS JU1 C1 0.01F 4 RXDATA RXD RTS# 15 USBDP TXD U1 FT232RL DSR# N.C. 9 C3 47pF 8 1 3 5 VCCI0 16 USBDM C2 47pF R2IN 4 1 2 3 VCC30 RTS T2OUT 3 T1OUT 2 27 DTR T4OUT 1 T3 OUT DCD 28 P2-1 P2-2 P2-3 DB9 TYPE DTE 24 N.C. 27 OSCI SLEEP# DCD# RI# R1 270 D2 32 JU3 1 R2 270 CBUS1
P1
USB TYPE B
P1-1
P1-2
P1-3
P1-4
VCC
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C8 0.1F
USB-to-COM Port Adapter Board User Guide USBTO232
Figure 29. USBTO232 Component Placement Guide--Component Side
Figure 30. USBTO232 PCB Layout--Component Side
Figure 31. USBTO232 PCB Layout--Solder Side
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 31
(c) 2006 Maxim Integrated Products CARDENAS is a registered trademark of Maxim Integrated Products, Inc.

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