AT91SAM7X128C-CU 데이터 시트보기 (PDF) - Atmel Corporation

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AT91SAM7X128C-CU

AT91SAM ARM-based Flash MCU

Atmel Corporation 

SAM7X512/256/128 Summary

10.3 Peripheral Multiplexing on PIO Lines

The SAM7X512/256/128 features two PIO controllers, PIOA and PIOB, that multiplex the I/O

lines of the peripheral set.

Each PIO Controller controls 31 lines. Each line can be assigned to one of two peripheral func-

tions, A or B. Some of them can also be multiplexed with the analog inputs of the ADC

Controller.

Table 10-2 on page 32 and Table 10-3 on page 33 defines how the I/O lines of the peripherals A,

B or the analog inputs are multiplexed on the PIO Controller A and PIO Controller B. The two

columns “Function” and “Comments” have been inserted for the user’s own comments; they may

be used to track how pins are defined in an application.

Note that some peripheral functions that are output only, may be duplicated in the table.

At reset, all I/O lines are automatically configured as input with the programmable pull-up

enabled, so that the device is maintained in a static state as soon as a reset is detected.

31

6120GS–ATARM–07-Apr-11

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