Signature
Documents signature bytes used on EPROM, AT89C51, 87C51, etc.
https://www.jedec.org/standards-documents/docs/jep-106ab
Is AT89C51 signature the same as P87C51 signature?
Do mcs51 mask ROM parts support signature?
Are EPROM signatures compatible with mcs51 signatures in any way?
89C51 family
IDs are found at special NV memory address 0x30-0x32
| ID (hex) | Vendor | Chip label | Die ID |
|---|---|---|---|
| row 1, cell 1 | row 1, cell 2 | row 1, cell 3 | row 1, cell 3 |
| row 2, cell 1 | row 2, cell 2 | row 2, cell 3 | row 2, cell 3 |