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Using Micron asynchronous PSRAM with ADI ADSP-BF53x Blackfin processors

Posted: 19 Feb 2008 ?? ?Print Version ?Bookmark and Share

Keywords:PSRAM? DRAM? Blackfin processor?

Micron PSRAM devices are high-speed, CMOS pseudo-SRAM memory devices developed for low-power, portable applications. These devices use a DRAM-based memory core, and are designed to be backward compatible with the more costly 6-transistor asynchronous SRAM. They can be used as an SRAM replacement in many applications. For seamless operation on an SRAM bus, PSRAM products incorporate a transparent self refresh mechanism. This hidden refresh requires no additional support from the system memory controller and has no significant impact on device read/write performance. A future design revision of the Micron 8Mbit PSRAM device will offer asynchronous read and write access times of 55ns with a VCC core voltage of 3.3V. This design is slated for production in early 2008.

The ADSP-BF53x family of Blackfin embedded processors from Analog Devices Inc. provides an asynchronous external memory bus that can be used to interface with up to four 8Mbit PSRAM devices. This technical note describes the design requirements for a seamless memory connection between Blackfin processors and Micron 70ns, 8Mbit asynchronous PSRAM devices.

View the PDF document for more information.

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