AT91SAM7X256-AU-999 Atmel, AT91SAM7X256-AU-999 Datasheet - Page 32

• Manufacturer Part Number: AT91SAM7X256-AU-999
• Description: IC ARM7 MCU 256K FLASH 100-LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7X256-AU-999

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 62
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7X-EK - KIT EVAL FOR AT91SAM7X256/128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: AT91SAM7X256-AU-999TR

10.3
Peripheral Multiplexing on PIO Lines
The AT91SAM7X512/256/128 features two PIO controllers, PIOA and PIOB, that multiplex the
I/O lines of the peripheral set.
Each PIO Controller controls 31 lines. Each line can be assigned to one of two peripheral func-
tions, A or B. Some of them can also be multiplexed with the analog inputs of the ADC
Controller.
Table 10-2 on page 33
and
Table 10-3 on page 34
defines how the I/O lines of the peripherals A,
B or the analog inputs are multiplexed on the PIO Controller A and PIO Controller B. 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.
AT91SAM7X512/256/128 Preliminary
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6120FS–ATARM–17-Feb-09