CY62157EV30LL SRAM initialization issue

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chku_3524716
Level 1
Level 1

Hi,

We are using LPC4088 based custom board interfacing external nor-flash(SST39vf3201), SRAM(CY62157EV30LL) & FPGA on static memory CS3, CS1, CS0 respectively. We are using Nor-flash for code storage & execution. A custom USB bootloader is stored in internal flash & execution jumps from internal to external flash.

SRAM is used mainly for LCD buffers & LCD has dedicated DMA  which reads bmps from SRAM & load into LCD display. The problem is that when I initialize SRAM according to its wait states given in the data sheet, the actual wait states I get is double of what I set. I did not understand this. Due to this it is slow and also affect the code execution.

Anyone aware of this problem. Please help.

Regards

Chaitanya.

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