AT91SAM7S256-AU-001 Atmel, AT91SAM7S256-AU-001 Datasheet - Page 17

• Manufacturer Part Number: AT91SAM7S256-AU-001
• Description: IC ARM7 MCU 32BIT 256K 64LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7S256-AU-001

• Package / Case: 64-LQFP
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 55MHz
• Number Of I /o: 32
• Core Processor: ARM7
• Program Memory Type: FLASH
• Ram Size: 64K x 8
• Program Memory Size: 256KB (256K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Connectivity: I²C, SPI, SSC, UART/USART, USB
• Core Size: 16/32-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: AT91SAM7S256AU001

7.4
6175FS–ATARM–03-Dec-07
Peripheral DMA Controller
• Handles data transfer between peripherals and memories
• Eleven channels: AT91SAM7S512/256/128/64/321/161
• Nine channels: AT91SAM7S32/16
• Low bus arbitration overhead
• Next Pointer management for reducing interrupt latency requirements
– Prefetch buffer, buffering and anticipating the 16-bit requests, reducing the required
– Key-protected program, erase and lock/unlock sequencer
– Single command for erasing, programming and locking operations
– Interrupt generation in case of forbidden operation
– Two for each USART
– Two for the Debug Unit
– Two for the Serial Synchronous Controller
– Two for the Serial Peripheral Interface
– One for the Analog-to-digital Converter
– One Master Clock cycle needed for a transfer from memory to peripheral
– Two Master Clock cycles needed for a transfer from peripheral to memory
wait states
AT91SAM7S Series Summary
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