at91sam7l128 ATMEL Corporation, at91sam7l128 Datasheet - Page 37

• Manufacturer Part Number: at91sam7l128
• Description: At91 Arm Thumb-based Microcontroller
• Manufacturer: ATMEL Corporation

10.3
6257AS–ATARM–28-Feb-08
Peripheral Multiplexing on PIO Lines
The AT91SAM7L128/64 features three PIO controllers, PIOA, PIOB and PIOC, that multiplex
the I/O lines of the peripheral set.
PIO Controller A, B and C control respectively 26, 24 and 30 lines. Each line can be assigned to
one of two peripheral functions, A or B.
Table 10-2 on page 38
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.
defines how the I/O lines of the peripherals A, B or the analog inputs are
AT91SAM7L128/64 Preliminary
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