FSMC multiplexed mode

gahelton12 · ‎2009-11-07

Posted on November 07, 2009 at 17:56

gahelton12 · ‎2011-05-17

Posted on May 17, 2011 at 13:29

I would like to use the FSMC in multiplexed mode. Which 16 lines are used as the multiplexed bus AD[15:0]?

A[15:0] or D[15:0] ?

Also, I plan on using a SRAM (in multiplexed mode, 16 bit data access).

Of course there will be an external address latch. Nowhere in the datasheets or reference manuals is a timing diagram for SRAM in multiplexd mode shown. However, it looks like the NOR memory timing will work for this. Since I'm using 16 bit data access, do I need to be concerned with ''byte lane'' signals ?

Thanks-

gahelton12 · ‎2011-05-17

Posted on May 17, 2011 at 13:29

Found the answer on multiplexed lines.

Bit 1 MUXEN: Address/data multiplexing enable bit.

When this bit is set, the address and data values are multiplexed on the databus, valid only with

NOR and PSRAM memories:

0: Address/Data nonmultiplexed

1: Address/Data multiplexed on databus (default after reset)

Still need success stories of multiplexed, 16 bit SRAM access.