Hello, I have NRF D 24LU1P 1201FD and NRF F 24LU1P 2136IW. The first one executes all commands, while the second one does not work for writing and erasing.
I tried to erase the contents of the second chip using the SPI interface. I send WREN, then send RDSR to check if the write is enabled, then ERASE_ALL and check RDSR when the chip is done.
The first one erases the MainBlock and there are approximately 360,000 cycles. but the second one does not erase and not reset SFR.WEN to 0.
PROGRAM doesn't work, ERASE PAGE doesn't work, RDISIP and RDISMB change FSR but don't write bytes into InfoPage.
What could be the problem?
InfoPage
000: FF FF FF FF FF FF FF FF FF FF FF 89 7A 72 68 4E
010: 75 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
020: FF 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF
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1F0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF