AT91SAM7S64B-AU Atmel, AT91SAM7S64B-AU Datasheet - Page 17

• Manufacturer Part Number: AT91SAM7S64B-AU
• Description: IC ARM7 MCU 32BIT 64K 64LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7S64B-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K 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: 64-LQFP
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7S-EK - KIT EVAL FOR ARM AT91SAM7S
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: AT91SAM7S64C-AU; AT91SAM7S64C-AU

7.4
6175IS–ATARM–30-Aug-10
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
• Peripheral DMA Controller (PDC) priority is as follows (from the highest priority to the lowest):
– 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
Receive
Receive
Receive
Receive
Receive
Receive
Transmit
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Transmit
AT91SAM7S Series Summary
DBGU
USART0
USART1
SSC
ADC
SPI
DBGU
USART0
USART1
SSC
SPI
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