AT91SAM7S32B-AU-001 Atmel, AT91SAM7S32B-AU-001 Datasheet - Page 17

• Manufacturer Part Number: AT91SAM7S32B-AU-001
• Description: 8-Bit Microcontrollers
• Manufacturer: Atmel

Specifications of AT91SAM7S32B-AU-001

• Termination Type: SMD
• Interface: I2C, SPI, UART
• Embedded Interface Type: I2C, SPI, UART
• Supply Voltage Max: 3.6V
• No. Of Adc Inputs: 8
• Flash Memory Size: 32KB
• No. Of I/o Pins: 21
• Core Size: 32 Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
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Transmit
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AT91SAM7S Series Summary
DBGU
USART0
USART1
SSC
ADC
SPI
DBGU
USART0
USART1
SSC
SPI
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