Datasheet

31
AT32UC3A
10.7 Peripheral Multiplexing on I/O lines
Each GPIO line can be assigned to one of 3 peripheral functions; A, B or C. The following table
define how the I/O lines on the peripherals A, B and C are multiplexed by the GPIO.
4 USART2 - RX
5 USART3 - RX
6TWI - RX
7 SPI0 - RX
8 SPI1 - RX
9 SSC - TX
10 USART0 - TX
11 USART1 - TX
12 USART2 - TX
13 USART3 - TX
14 TWI - TX
15 SPI0 - TX
16 SPI1 - TX
17 ABDAC
Table 10-8. PDC Handshake Signals
PID Value Peripheral module & direction
Table 10-9. GPIO Controller Function Multiplexing
TQFP100 VQFP144 PIN GPIO Pin Function A Function B Function C
19 25 PA00 GPIO 0 USART0 - RXD TC - CLK0
20 27 PA01 GPIO 1 USART0 - TXD TC - CLK1
23 30 PA02 GPIO 2 USART0 - CLK TC - CLK2
24 32 PA03 GPIO 3 USART0 - RTS EIM - EXTINT[4] DAC - DATA[0]
25 34 PA04 GPIO 4 USART0 - CTS EIM - EXTINT[5] DAC - DATAN[0]
26 39 PA05 GPIO 5 USART1 - RXD PWM - PWM[4]
27 41 PA06 GPIO 6 USART1 - TXD PWM - PWM[5]
28 43 PA07 GPIO 7 USART1 - CLK PM - GCLK[0] SPI0 - NPCS[3]
29 45 PA08 GPIO 8 USART1 - RTS SPI0 - NPCS[1] EIM - EXTINT[7]
30 47 PA09 GPIO 9 USART1 - CTS SPI0 - NPCS[2] MACB - WOL
31 48 PA10 GPIO 10 SPI0 - NPCS[0] EIM - EXTINT[6]
33 50 PA11 GPIO 11 SPI0 - MISO USB - USB_ID
36 53 PA12 GPIO 12 SPI0 - MOSI USB - USB_VBOF
37 54 PA13 GPIO 13 SPI0 - SCK
39 56 PA14 GPIO 14
SSC -
TX_FRAME_SYNC
SPI1 - NPCS[0] EBI - NCS[0]
40 57 PA15 GPIO 15 SSC - TX_CLOCK SPI1 - SCK EBI - ADDR[20]
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