AT32AP7002_09 Datasheet, PDF (32/52 Pages) ATMEL Corporation – AVR 32 32-bit Microcontroller

AT32AP7002
7.8 Peripheral overview
7.8.1 External Bus Interface
7.8.2
• Optimized for Application Memory Space support
• Integrates Three External Memory Controllers:
– Static Memory Controller
– SDRAM Controller
– ECC Controller
• Additional Logic for NAND Flash/SmartMedia^TM and CompactFlash^TM Support
– SmartMedia 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
– Up to 26-bit Address Bus, Up to 64-Mbytes Addressable
– Optimized pin multiplexing to reduce latencies on External Memories
• Up to 6 Chip Selects, Configurable Assignment:
– Static Memory Controller on NCS0
– SDRAM Controller or Static Memory Controller on NCS1
– Static Memory Controller on NCS2
– Static Memory Controller on NCS3, Optional NAND Flash/SmartMedia^TM Support
– Static Memory Controller on NCS4 - NCS5, Optional CompactFlash^TM Support
Static Memory Controller
7.8.3
• 6 Chip Selects Available
• 64-Mbyte Address Space per Chip Select
• 8-, 16- or 32-bit Data Bus
• Word, Halfword, Byte Transfers
• Byte Write or Byte Select Lines
• Programmable Setup, Pulse And Hold Time for Read Signals per Chip Select
• Programmable Setup, Pulse And Hold Time for Write Signals per Chip Select
• Programmable Data Float Time per Chip Select
• Compliant with LCD Module
• External Wait Request
• Automatic Switch to Slow Clock Mode
• Asynchronous Read in Page Mode Supported: Page Size Ranges from 4 to 32 Bytes
SDRAM Controller
• Numerous Configurations Supported
– 2K, 4K, 8K Row Address Memory Parts
– SDRAM with Two or Four Internal Banks
– SDRAM with 16- or 32-bit Data Path
• Programming Facilities
– Word, Half-word, Byte Access
– Automatic Page Break When Memory Boundary Has Been Reached
– Multibank Ping-pong Access
– Timing Parameters Specified by Software
– Automatic Refresh Operation, Refresh Rate is Programmable
32
32054FS–AVR32–09/09