AT91SAM7X512 ATMEL Corporation, AT91SAM7X512 Datasheet - Page 16

• Manufacturer Part Number: AT91SAM7X512
• Description: AT91 ARM Thumb-based Microcontrollers
• Manufacturer: ATMEL Corporation

7.4
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Peripheral DMA Controller
AT91SAM7X512/256/128 Preliminary Summary
• Embedded Flash Controller
• Handles data transfer between peripherals and memories
• Thirteen channels
• Low bus arbitration overhead
• Next Pointer management for reducing interrupt latency requirements
– Embedded Flash interface, up to three programmable wait states
– 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 each 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
6120DS–ATARM–03-Oct-06