A single bit overwritten issue in non-targeted words in Async SRAM

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cross mob
Anonymous
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Hello,

I am new to this forum and I am a developer who is self-taught.

Recently I have some problem with some MCU boards interfacing with CY7C1061GE (1M x 16 bit, TSOP Async SRAM). In my memory test program, it was found that a single bit in ALL the other non-targeted words are toggled together the same bit of the targeted word (to the same sense). I could not think of a possibility/combination that how can it be caused by external wiring problem. Visual checks on the pins did not show any obvious soldering fault too.

Please enlighten me on any pin-fault that could cause this or if this is a problem on the Chip itself.

Thank you very much.

ST Goh

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