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Features
* Synthesizer, Reverb, Chorus on a Single Chip * No External ROM or RAM * Single-chip All-in-one Design, Only Requires External DAC
- MIDI Control Processor, Serial and Parallel Interface - Synthesis - Compatible Effects: Reverb and Chorus - Programmable Spatial Effects or Four-channel Surround(1) - 3DMIDITM: Four-speaker MIDI(1) - 4-band Stereo Equalizer State-of-the-Art Synthesis for Best Quality/Price Products - 38-voice Polyphony + Effects - On-chip Wavetable Data, Firmware, RAM Delay Lines Synthesizer Chipset: SAM9793 + DAC Hardware-programmable DAC Mode - I2S 16 to 20 Bits - Japanese 16 Bits Typical Applications: Cost-sensitive PC Wavetable Synthesis/VCD Karaoke/Musical Instruments 100-lead PQFP Package: Easy Mounting Ideal for Battery Operation - Low Power - Power-down Mode - Wide Supply Voltage Range: 2.45V to 2.95V Core, 3V to 5.5V Periphery 1. Four-channel surround and 3DMIDI require additional DAC.
* * * * * *
Single-chip Synthesizer with Effects, Parallel Interface SAM9793
Note:
Description
The SAM9793 provides a single-chip, low-cost MIDI sound system. Equipped with a parallel MIDI input, it provides state-of-the-art sound synthesis together with a range of compatible effects. Its low power consumption makes it ideal for battery-powered applications such as portable Karaoke or VCD Karaoke systems. It can also be used for cost-sensitive PC-based wavetable synthesis applications. Figure 1. Typical Hardware Configuration
MIDI IN/OUT
SAM9793
MPU-401 (Parallel Port)
Stereo DAC
Audio Out
Rev. 1717B-06/01
1
Pin Description
Pins by Function
Table 1. Power Supply Group
Pin Name GND VCC VC3 Pin Number 5, 7, 14, 18, 19, 21, 48, 54, 58, 67, 84, 96 6, 16, 46, 57, 76, 85, 94 27, 52, 56, 80, 86 Type PWR PWR PWR Function Digital Ground All pins should be connected to a ground plane. Power Supply, 3V to 5.5V All pins should be connected to a VCC plane. Core Power Supply, 2.45V to 2.95V. All pins should be connected to nominal 2.7V.
Table 2. Serial MIDI, Parallel MIDI (MPU-401)
Pin Name MIDI IN Pin Number 98 Type IN Function Serial TTL MIDI In. Connected to the built-in synthesizer at power-up or after MPU reset. Connected to the D0 - D7 bus (read mode) when MPU switched to UART mode. Serial TTL MIDI Out, not used at power-up or after MPU reset. Connected to the D0 - D7 bus (write mode) when MPU switched to UART mode. 8-bit bi-directional bus under control of CS, RD, WR. Select data(0) or control(1) for write, data(0) or status(1) for read. Chip select, active low. Read, active low. When CS and RD are low, data (A0 = 0) or status (A0 = 1) is read on D0 - D7. Read data is acknowledged on the rising edge of WR. Write, active low. When CS and WR/ are low, data (A0 = 0 or control (A0 = 1) are written from the D0 - D7 bus to the SAM9793 on the rising edge of WR. A rising edge indicates that a MIDI byte is available for read on D0 - D7. Acknowledged by reading the byte. This pin is floated until the SAM9793 is switched to MPU-401 UART mode.
MIDI OUT D0 - D7 A0 CS RD WR IRQ
45 68, 70, 73, 92, 93, 95, 97, 100 40 49 51 47 43
OUT I/O IN IN IN IN TS OUT
Table 3. Digital Audio Group
Pin Name CLBD WSBD DABD0 DABD1 DACSEL Pin Number 1 11 9 10 8 Type OUT OUT OUT OUT IN Function Digital audio bit clock Digital audio left/right select Digital audio main stereo output Auxiliary digital stereo output. Surround or 3DMIDI output. DAC type : 0 = I2S 16 to 20 bits, 1 = Japanese 16 bits
2
SAM9793
SAM9793
Table 4. Miscellaneous Group
Pin Name X1 - X2 Pin Number 89, 88 Type - Function 9.6 MHz crystal connection. An external 9.6 MHz clock can also be used on X1 (2.7V input). X2 cannot be used to drive external circuits, use CKOUT instead. Buffered X2 output, can be used to drive external DAC master clock (256 x Fs). PLL external RC network. Reset input, active low. This is a Schmitt trigger input, allowing direct connection of an RC network. Power-down, active low. When power-down is active, then all output pins will be floated. The crystal oscillator will be stopped. To exit from power-down, PDWN should be high and RESET applied. Test pins. Should be grounded. When high, indicates that the synthesizer is up and running.
CKOUT LFT RESET PDWN
2 87 90 91
OUT - IN IN
TEST0 TEST4 RUN
17, 20, 22, 23, 55 99
IN OUT
3
Pinout
Figure 2. SAM9793 in 100-lead TQFP Package
CLBD CKOUT NC NC GND VCC GND DACSEL DABD0 DABD1 WSBD NC NC GND NC VCC TEST0 GND GND TEST1 GND TEST2 TEST3 NC NC
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
D7 RUN MIDI IN D6 GND D5 VCC D4 D3 PDWN RESET X1 X2 LFT VC3 VCC GND NC NC NC VC3 NC NC NC VCC
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 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
75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
NC NC D2 NC NC D1 NC D0 GND NC NC NC NC NC NC NC NC GND VCC VC3 TEST4 GND NC VC3 RD
4
NC VC3 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC IRQ NC MIDI OUT VCC WR GND CS NC
SAM9793
SAM9793
Mechanical Dimensions
Figure 3. 100-lead Plastic Quad Flat Pack
Table 5. Package Dimensions (in mm)
Dimension A A1 A2 D D1 E E1 L P B 0.22 0.65 0.25 2.55 2.8 23.90 20.00 17.90 14.00 0.88 0.65 0.38 1.03 3.05 Min Typ Max 3.40
5
Absolute Maximum Ratings
Table 6. Absolute Maximum Ratings
Symbol - - - - VCC VC3 - Parameter/Condition Ambient Temperature (power applied) Storage Temperature Voltage on any pin (except X1) Voltage on X1 pin Supply Voltage Supply Voltage Maximum IOL per I/O pin Min -40 -6.5 -0.5 -0.5 -0.5 -0.5 Typ Max +85 +150 VCC + 0.5 VC3 + 0.25 6.5 2.95 10 Unit C C V v V V mA
Recommended Operating Conditions
Table 7. Recommended Operating Conditions
Symbol VCC VC3 Note: Parameter/Condition Supply Voltage(1) Supply Voltage Min 3 2.45 Typ 3.3/5.0 2.7 Max 5.5 2.95 Unit V V
Operating Ambient Temperature 0 70 C TA 1. When using 3.3V VCC supply in a 5V environment, care must be taken that pin voltage does not exceed VCC + 0.5V. Pin X1 is powered by VC3 input. If X1 is driven by a 5V device, then a minimum series resistor is required (typ. 330).
DC Characteristics
Table 8. DC Characteristics (TA = 25C, VC3 = 2.7V 10%)
Symbol VIL VIH VOL VOH ICC Parameter/Condition Low-level Input Voltage High-level Input Voltage Low-level Output Voltage (IOL = -3.2 mA) High-level Output Voltage (IOH = 0.8 mA) Power Supply Current (Crystal Freq. = 9.6 MHz) Power-down Supply Current VCC 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 2.8 4.5 50 10 70 70 15 100 Min -0.5 -0.5 2.3 3.3 Typ Max 1.0 1.7 VCC + 0.5 VCC + 0.5 0.45 0.45 Unit V V V V V V V V mA mA A
6
SAM9793
SAM9793
Timings
Parallel MPU-401 Interface
Figure 4. MPI Interface Read Cycle
A0
CS RD
tAVCS
tCSLRDL tPRD tRDLDV tRDHCSH tDRH
D0 - D7
IRQ
Figure 5. MPU Interface Write Cycle
A0 tAVCS CS WR tCSLWRL tPWR tDWS D0 - D7 tWRHCSH tDWH
7
Table 9. Timing Parameters
Symbol tAVCS tCSLRDL tRDHCSH tPRD tRDLDV tDRH tCSLRWRL tWRHCSH tPWR tDWS tDWH Parameter Address Valid to Chip Select Low Chip Select Low to RD Low RD High to CS High RD Pulse Width Data Out Valid from RD Data Out Hold from RD Chip Select Low to WR Low WR High to CS High WR Pulse Width Write Data Setup Time Write Data Hold Time 5 5 5 50 10 0 Min 0 5 5 50 20 10 Typ Max Unit ns ns ns ns ns ns ns ns ns ns ns
Digital Audio
Figure 6. Digital Audio Timing
tCW WSBD CLBD DABD0 DABD1
tCW
tCLBD
tSOD
tSOD
Table 10. Timing Parameters
Symbol tCW tSOD tCLBD Parameter CLBD Rising to WSBD Change DABDx Valid before/after CLBD Rising CLBD Cycle Time Min 200 200 416.67 Typ Max Unit ns ns ns
8
SAM9793
SAM9793
Digital Audio Frame
Figure 7. Digital Audio Frame Format
WSBD (I2S) WSBD Japanese CLBD
DABD0 DABD1 MSB LSB (16 bits)
X
X
XXXX
X
XX
XX
X
LSB (20 bits) LSB (18 bits)
MSB
Note:
Selection of I2S or Japanese format is via pin DACSEL.
9
Reset and Power-down
During power-up, the RESET input should be held low until the crystal oscillator and PLL are stabilized, which can take about 20 ms. A typical RC/diode power-up network can be used. After RESET, the SAM9793 enters an initialization routine. It will take around 50 ms before a MIDI IN or MPU message can be processed. If PDWN is asserted low, then all I/Os and outputs will be floated and the crystal oscillator and PLL will be stopped. The chip enters a deep power-down sleep mode. To exit power-down, PDWN has to be asserted high, then RESET applied.
SAM9793. The board GND and VCC distribution should be in grid form. For 5V VCC operation, if 2.7V is not available, then VC3 can be connected to VCC by three 1N4148 diodes in series. Recommended VCC decoupling is 0.1 F at each corner of the IC with an additional 10 F decoupling close to the crystal. VC3 requires a single 0.1 uF decoupling close to the IC. * Crystal, LFT The paths between the crystal, the crystal compensation capacitors, the LFT filter R-C-R and the SAM9793 should be short and shielded. The ground return from the compensation capacitors and LFT filter should be the GND plane from SAM9793. * Analog section A specific AGND ground plane should be provided, which connects by a single trace to the GND ground. No digital signals should cross the AGND plane. Refer to the codec vendor recommended layout for correct implementation of the analog section.
Recommended Board Layout
As for all HCMOS high-integration ICs, some rules of board layout should be followed for reliable operation: * GND, VCC, VC3 distribution, decouplings All GND, VCC and VC3 pins should be connected. GND and V C C pl an es ar e s tr o ng ly r ec o mm en de d be lo w th e
10
SAM9793
SAM9793
Recommended Crystal Compensation and LFT Filter
Figure 8. Recommended Crystal Compensation and LFT Filter
C1 GND 22 pF X1 9.6 MHz GND C4 22 pF LFT C2 2.2 nF R1 100 VCC C3 10 nF GND PDWN X2 X1
DABD1
DABD0
WSBD
CLBD
RUN
11
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(c) Atmel Corporation 2001. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems. ATMEL (R) is the registered trademark of Atmel Corporation; 3DMIDI is a trademark of Atmel Corporation. Terms and product names in this document may be trademarks of others.
Printed on recycled paper.
1717B-06/01/0M

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