SAM7S256_14 Datasheet, PDF (34/775 Pages) ATMEL Corporation – ARM-based Flash MCU

Table 10-2. Peripheral Identifiers (SAM7S32/16)
Peripheral
ID
Peripheral
Mnemonic
Peripheral
Name
0
AIC
Advanced Interrupt Controller
1
SYSC⁽¹⁾
System
2
PIOA
Parallel I/O Controller A
3
Reserved
4
ADC⁽¹⁾
Analog-to Digital Converter
5
SPI
Serial Peripheral Interface
6
US
USART
7
Reserved
8
SSC
Synchronous Serial Controller
9
TWI
Two-wire Interface
10
PWMC
PWM Controller
11
Reserved
12
TC0
Timer/Counter 0
13
TC1
Timer/Counter 1
14
TC2
Timer/Counter 2
15 - 29
Reserved
30
AIC
Advanced Interrupt Controller
31
Reserved
External
Interrupt
FIQ
IRQ0
10.3
Peripheral Multiplexing on PIO Lines
The SAM7S 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 SAM7S32/16). 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 10-3, “Multiplexing on PIO Controller A (SAM7S512/256/128/64/321/161),” on page 35 and Table 10-4,
“Multiplexing on PIO Controller A (SAM7S32/16),” on page 36 define 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 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.
SAM7S Series [DATASHEET] 34
6175M–ATARM–26-Oct-12