The AU-MB4000 Compact Flash Controller AMBA Subsystem provides a Compact Flash
Controller peripheral subsystem for AMBA based SOCs. It contains a Compact Flash Controller
that connects seamlessly to the AMBA AHB Bus as an AMBA Bus slave. The Compact Flash
Controller AMBA Subsystem Core is available as a synthesizable Verilog model from Aurora
VLSI, Inc.

Compact Flash Controller
• CompactFlash and CF+ version 3.0
• PC card memory, PC card I/O, and true IDE modes
• IDE multiword DMA and Ultra DMA modes
• 8 bit or 16 bit Compact Flash Controller data bus
• User configurable reset values and fully programmable compact flash card timing
parameters
• Supports all compact flash card commands
• Supports direct command block accesses
• Supports common memory, attribute memory, and IO accesses (PC card modes)
• Interrupt or host processor polling for Compact Flash command completion
AMBA Slave Interface
• AMBA AHB Bus slave
• 32 bit or 64 bit AMBA AHB Bus- user configurable
• Supports all required AMBA AHB Bus features
• Implements AMBA Bus timeout and RETRY response
• Read data prefetching
• Write data packing
• Same cycle device request/response is supported for highest throughput
• Handles all data packing/unpacking and data alignment for data transfer sizes that do
not match the AMBA Bus width and/or Compact Flash data bus width
• User configurable for big or little endian AMBA Bus and memory