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Muxed PSRAM

rigomate2
Associate III
Posted on August 14, 2014 at 13:53

Hi!

ST refers to a technology called muxed PSRAM.

As far as I know, this simply means, that the data and address signals share the same IO pins.

All simple and good, but my question is, could someone point me to a PSRAM, which actually is compatible to such an arrangement? I googled a lot, but all I could find was a US patent about this technology.

BTW, my requirement is to drive a TFT (320x240) screen with ST's LTDC (Hsync, Vsyc etc). I would like to be able to use an LQFP100 package, which leaves me the opportunity to have a 8 bit muxed PSRAM as a frame buffer for the display.

See attached STM32Cube file.

Thanks a bunch!

#lmgtfy
3 REPLIES 3
Posted on August 14, 2014 at 14:28

> All simple and good, but my question is, could someone point me to a PSRAM, which

> actually is compatible to such an arrangement?

IS66WVD1M16ALL , for example?

You can also demux address from data using a 16x latch.

JW

rigomate2
Associate III
Posted on August 15, 2014 at 13:49

Thanks guys!

I really appreciate it!