Atmel MCU Evaluation Kit AT91SAM7X-EK AT91SAM7X-EK Data Sheet
Product codes
AT91SAM7X-EK
31
SAM7X Series [SUMMARY DATASHEET]
6120IS–ATARM–14-Nov-13
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 functions, A or B. Some of
them can also be multiplexed with the analog inputs of the ADC Controller.
them can also be multiplexed with the analog inputs of the ADC Controller.
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.
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.
maintained in a static state as soon as a reset is detected.