AnsweredAssumed Answered

synchronous non-multiplexed PSRAM

Question asked by jeff moore on Dec 21, 2017
Latest reply on Jan 8, 2018 by waclawek.jan

We are using STM32 microcontrollers that have a parallel data bus driven by on-board memory controller called FMC. This data bus has multiple operating modes and the one in which we are interested is synchronous non-multiplexed PSRAM. It must be synchronous, the RAM will have a clock input.

Focusing on the L4 and F7 series(only certain members of a product range have the FMC capability that depends on the package size).

To demonstrate that the bus is working properly, we would like to connect a synchronous RAM to the bus operating at 3.3V with a data bus width of 16 bits. The RAM needs to be mounted in such a way that it is easy to connect it to a target microcontroller with flying leads. I have had a good look and finding/sourcing a suitable RAM is proving very difficult as all PSRAM seems to be Asynchronous, some Cellular RAM and dual port RAM(would only need one port) does offer synchronous capabilities. Any help gratefully received