Signature: Difference between revisions

From Proghq
Jump to navigation Jump to search
No edit summary
No edit summary
 
(6 intermediate revisions by the same user not shown)
Line 1: Line 1:
Documents signature bytes used on EPROM, AT89C51, 87C51, etc.
Documents signature bytes used on EPROM, AT89C51, 87C51, etc.
Also known as:
* Signature
* Device ID
* Identity code


TODO:
TODO:
* Is 87C51 and 89C51 signature protocol the same?
* Are 87C51 and 89C51 signature protocols the same?
* Do mcs51 mask ROM parts support signature?
** Looks like it
* Are EPROM signatures compatible with mcs51 signatures?
** Also looks like some 8751 support signature
* Do mcs51 mask ROM parts support signature?
* Are EPROM signatures compatible with mcs51 signatures?
** Don't think so...power pins are very different
 


= JEDEC =
= JEDEC =
Line 48: Line 57:


= 87C51 family =
= 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

Latest revision as of 18:32, 12 August 2018

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?
    • Looks like it
    • Also looks like some 8751 support signature
  • Do mcs51 mask ROM parts support signature?
  • Are EPROM signatures compatible with mcs51 signatures?
    • Don't think so...power pins are very different


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