AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 34

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

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