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Published 20 hours ago • verified publisher icon jdfr228

SST 39VF040 - IC is not recognized

Open p-b-p opened this issue 1 year ago • 10 comments

It is flashed with stock SCPH-9001 BIOS and everything is working:

20230607_091057

When /WE pin is connected to VCC if I boot the flasher CD and press L1 the IC is detected as:

20230607_002855

When /WE is connected to /SWR0 or /WR:

image

the flasher CD boots, but I am unable to interact and detect the IC by pressing L1. It is not working and nothing happens:

20230607_002329

IC pins are checked for shortages and stock BIOS is working as expected - memory card menu is working and I am able to boot fine backup CDs. What could be wrong with my setup?

IC's datasheet: https://datasheet.lcsc.com/lcsc/2207211800_Microchip-Tech-SST39VF040-70-4I-WHE_C633807.pdf

p-b-p avatar Jun 07 '23 07:06 p-b-p