AT91SAM7SE256 ATMEL [ATMEL Corporation], AT91SAM7SE256 Datasheet - Page 36

• Manufacturer Part Number: AT91SAM7SE256
• Description: Product Description
• Manufacturer: ATMEL [ATMEL Corporation]

10.3
Peripheral Multiplexing on PIO Lines
The AT91SAM7SE512/256/32 features three PIO controllers, PIOA, PIOB and PIOC, that multi-
plex the I/O lines of the peripheral set.
PIO Controller A and B control 32 lines; PIO Controller C controls 24 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.
Table 10-2 on page 37
defines how the I/O lines of the peripherals A and B or the analog inputs
are multiplexed on the PIO Controller A, B and C. 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.
AT91SAM7SE512/256/32 Preliminary
36
6222ES–ATARM–15-Dec-09