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AT91SAM7SE32

AT91 ARM Thumb-based Microcontrollers

Atmel Corporation 

– Individually programmable size between 1K Byte and 1M Byte

– Individually programmable protection against write and/or user access

– Peripheral protection against write and/or user access

• Embedded Flash Controller

– Embedded Flash interface, up to three programmable wait states

– Prefetch buffer, buffering and anticipating the 16-bit requests, reducing the required

wait states

– Key-protected program, erase and lock/unlock sequencer

– Single command for erasing, programming and locking operations

– Interrupt generation in case of forbidden operation

7.4 External Bus Interface

• Integrates Three External Memory Controllers:

– Static Memory Controller

– SDRAM Controller

– ECC Controller

• Additional Logic for NAND Flash and CompactFlash® Support

– NAND Flash support: 8-bit as well as 16-bit devices are supported

– CompactFlash support: all modes (Attribute Memory, Common Memory, I/O, True

IDE) are supported but the signals _IOIS16 (I/O and True IDE modes) and -ATA SEL

(True IDE mode) are not handled.

• Optimized External Bus:

– 16- or 32-bit Data Bus (32-bit Data Bus for SDRAM only)

– Up to 23-bit Address Bus, Up to 8-Mbytes Addressable

– Up to 8 Chip Selects, each reserved to one of the eight Memory Areas

– Optimized pin multiplexing to reduce latencies on External Memories

• Configurable Chip Select Assignment:

– Static Memory Controller on NCS0

– SDRAM Controller or Static Memory Controller on NCS1

– Static Memory Controller on NCS2, Optional CompactFlash Support

– Static Memory Controller on NCS3, NCS5 - NCS6, Optional NAND Flash Support

– Static Memory Controller on NCS4, Optional CompactFlash Support

– Static Memory Controller on NCS7

7.5 Static Memory Controller

• External memory mapping, 512-Mbyte address space

• 8-, or 16-bit Data Bus

• Up to 8 Chip Select Lines

• Multiple Access Modes supported

– Byte Write or Byte Select Lines

– Two different Read Protocols for each Memory Bank

18 AT91SAM7SE512/256/32 [Advance Information Summary]

6222AS–ATARM–21-Aug-06

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