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ATSAM9743 Datasheet(PDF) 5 Page - ATMEL Corporation |
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ATSAM9743 Datasheet(HTML) 5 Page - ATMEL Corporation |
5 / 21 page 5 ATSAM9743 1773B–DRMSD–11/02 Pin Description Pins by Function Note: Power supply decoupling: Like all high speed HCMOS ICs, proper decoupling is mandatory for reliable operation and RFI reduc- tion. The recommended decoupling is 100 nF at each corner of the IC with an additional 10 µFT bulk capacitor close to the X1, X2 pins. Note: Pin names exhibiting an overbar (PDWN for example) indicate that the signal is active low. Table 1. Power Supply Pin Name Pin Number Type Function GND 5, 10, 18, 22, 33, 45, 47, 59, 62, 75, 88, 99 PWR Digital Ground: All pins should be connected to a ground plane VC3 3, 11, 21, 27, 61 PWR Core Power Supply, 3V to 3.8V: All pins should be connected VCC 17, 31, 46, 57, 73, 87, 100 PWR I/O Power Supply, 3V to 5.5V: All pins should be connected to a VCC plane Table 2. Single Function Pins Pin Name Pin Number Type Function CLBD 26 OUT External DAC serial bit clock WSBD 37 OUT External DAC left/right clock DABD0 35 OUT External DAC serial stereo audio data P3.12 - P3.14 81, 23, 24 Programmable General purpose I/O X1 13 IN Crystal connection, or external clock input at 256*Fs, Fs being the sampling frequency. When used as an input, a 330 ohms serial resistor should be inserted. Typical crystal frequency is 8 MHz (Fs = 32 kHz) X2 14 OUT Other end of crystal connection. Cannot be used to drive external circuitry. CKOUT 95 OUT Buffered X2 output, can be used to drive external circuits, such as Sigma/Delta DACs LFT 12 Analog Built-in PLL compensation filter input RESET 15 IN Master reset, active low, has built-in Schmitt trigger. PDWN 16 IN Power down, active low TEST[2:0] 42 - 44 IN Test pins. Should be grounded for normal operation. TEST0 is used to start the built-in debugger. In this case TEST2 specifies the communication baud rate. |
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