Answers Database

9500: What are the checksums in a JEDEC file and how do I read it?


Record #3579

Product Family:  Hardware

Product Line:  9500

Problem Title:
9500:  What are the checksums in a JEDEC file and how do I read it?


Problem Description:
Keywords:  checksum, CPLD, 9500, jed, jedec, programming

Urgency:  Standard

General Description:  This solution covers the details of how
to read a 9500 JEDEC programming file.


Solution 1:

Date Extracted: Mon Dec 08 08:43:28 1997   <-- Header

^BQF186624*				   <-- Number of Fuses in Device
QP352*					   <-- Number of Package Pins
QV0*					   <-- Maximum Number of Test Vectors
F0*					   <-- Default Fuse State
X0*					   <-- Default Test Condition
J0 0*					   <-- Device ID
N DEVICE XC95216-15-BG352 *		   <-- Comment Field
N PPMAP 232 A1 *			   <-- Comment Field
N PPMAP 209 A10 *			   <-- Comment Field
L0000000 00000011 00000011 00000011 00000011 00000011*^M  <-- Fuse List (Data)
L0000040 00000011 00000011 00000011 00000011 000000*^M	  <-- Fuse List (Data)
L0000078 000000 000000 000000 000000 000000*^M		  <-- Fuse List (Data)
L0186588 01111111 0111111 0111111 1111111 1111111*^M	  <-- Fuse List (Data)
C3012*^M				   <-- Fuse Checksum
^CF28D^M		   <-- '^C' ETX (ASCII 03) End Transmission
			   <-- 'F28D' File Checksum



***** USERCODE is spread across several places in JEDEC file
and is not visible in file.



End of Record #3579