Signature
Documents signature bytes used on EPROM, AT89C51, 87C51, etc.
Also known as:
- Signature
- Device ID
- Identity code
TODO:
- Are 87C51 and 89C51 signature protocols the same?
- Do mcs51 mask ROM parts support signature?
- Are EPROM signatures compatible with mcs51 signatures?
JEDEC
https://www.jedec.org/standards-documents/docs/jep-106ab
Think these are flash specific
"JEDEC SOLID STATE TECHNOLOGY ASSOCIATION"
"The intent of this identification code is that it may be used whenever a digital field is required, e.g., hardware, software, documentation, etc."
89C51 family
IDs are found at special NV memory address 0x30-0x32
| Sig (hex) | Vendor | Chip label | Die ID | Notes |
|---|---|---|---|---|
| 1E51FF | Atmel | AT89C51 | 19052 | |
| 9ED100 | Atmel | AT89C51 | 19651 | |
| 1E52FF | Atmel | AT89C52 | (19652) | Die ID was for a AT89C52, but not verified to have the same signature words |
87C51 family
Referneces
https://pcmhacking.net/forums/viewtopic.php?f=33&t=4668
http://www.mcumall.com/forum_GQ/post.asp?method=ReplyQuote&REPLY_ID=3587&TOPIC_ID=2105&FORUM_ID=9