Latest revision as of 18:32, 12 August 2018

Documents signature bytes used on EPROM, AT89C51, 87C51, etc.

Also known as:

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

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."

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

@@ Line 1: / Line 1: @@
 Documents signature bytes used on EPROM, AT89C51, 87C51, etc.
+Also known as:
+* Signature
+* Device ID
+* Identity code
-Is AT89C51 signature the same as P87C51 signature?
+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
-Do mcs51 mask ROM parts support signature?
-Are EPROM signatures compatible with mcs51 signatures in any way?
 = JEDEC =
@@ Line 24: / Line 31: @@
 {| class="wikitable"
 |-
-! ID (hex)
+! Sig (hex)
 ! Vendor
 ! Chip label
@@ Line 46: / Line 53: @@
 | AT89C52
 | (19652)
-| Die ID was for a AT89C52, but not verified to have the same electronic ID
+| 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