PIC32 MZ144 EBIMode

Started by andy321, May 30, 2022, 10:42:11 pm

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andy321

Hi folks,
 I've tried to implement an External Bus Interface on my Olimex PIC32-MZ144 board by connecting it to an external 8-bit 32Kx8 SRAM part. I followed the design code outlined in Section 47 of datasheet. What happens when I do a simple write cycle to the memory chip is I get the CS_, WE_ pulses correctly but data lines are tri-stated(as shown in the scope). The address lines values are iffy, but they are at correct voltage level. So the processor does not send out any data on this simple 8-bit write cycle.
 Has anybody successfully implemented an EBI operation on any PIC processor that you can share with I would most appreciated. Thanks very much in advance.

LubOlimex

My advice is to also directly post in Microchip boards and in forums and boards related to Microchip products and PIC products.
Technical support and documentation manager at Olimex