Product Summary  



EP504 AMBA AHB Bus to SDRAM Controller


  • SDRAM controller interfaces directly with AHB Bus and user interface.
  • Dual write buffer for simultaneous write posting and SDRAM access.
  • Dedicated read buffer with data width matching.
  • Early burst termination and CPU master busy on the AHB bus are supported.
  • Supports AHB bus data width of 8, 16 and 32 bits.
  • Zero wait state burst data transfer on both AHB interface and SDRAM.
  • Supports industrial standard SDRAM from 64Mbit to 256Mbit device sizes.
  • Pipeline access allows continuous data transfer without wasted cycle.
  • Fast page access on row address matching.
  • Independent row address matching for each of the 4 SDRAM banks.
  • Programmable SDRAM access timing parameters.
  • Automatic refresh generation with programmable refresh intervals.
  • Optimized for ASIC and FPGA implementations.

Differentiating Features

  • Multi port input.
  • Mobile DDR.
  • Multiple clock domain for user ports.
  • Multiple SoC and FPGA standard bus interface support (e.g. AHB-Lite, Avalon, PowerPc, Wishbone, SH4).
  • Different data with matching.


AMBA AHB bus to SDRAM Controller