AT91SAM7S128 ATMEL [ATMEL Corporation], AT91SAM7S128 Datasheet - Page 32

• Manufacturer Part Number: AT91SAM7S128
• Manufacturer: ATMEL [ATMEL Corporation]

11.2
Peripheral Multiplexing on PIO Lines
The AT91SAM7S Series features one PIO controller, PIOA, that multiplexes the I/O lines of the
peripheral set.
PIO Controller A controls 32 lines (21 lines for AT91SAM7S32). 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.
Table 11-1 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. 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.
All pins reset in their Parallel I/O lines function are configured in input with the programmable
pull-up enabled, so that the device is maintained in a static state as soon as a reset is detected.
AT91SAM7S Series Summary
32
6175BS–ATARM–04-Nov-05