General > General Technical Chat
Which is the eeprom?
BrokenYugo:
--- Quote from: Hornnumb2 on March 07, 2021, 07:37:13 pm ---Thanks, do I just search the chip number to found out if it shows as a eeprom?
--- End quote ---
Yup, just Google skills. Sometimes those sketchy datasheet sites are helpful with small parts that may only have partial numbers.
Hornnumb2:
Thanks yes I did google all those and saw they werent the eprom. Just wanted a second opinion since I dont do this all the time. I think I found it on the top board that I had left at the office. Its a 95640WP.
Hornnumb2:
Ok which would be pin 1 on here I don’t see a dot on this one and trying to figure it out on data sheet looking at it from writing right side up. I get ground on right bottom pin in circuit. That would put pin 1 at top left. Should I be reading it in as a different chip family not a 2408, 2416? Thanks for any help.
DrG:
I have been following this thread and I wish you luck and all, but let me ask you something...
When I look at threads like this, https://chevroletforum.com/forum/tahoe-suburban-25/unlocking-nav-after-installation-20590/page3/ I see a whole crap-load of "we did this so people would have to come to us to change things and not use junk yards.
So, what are you going to use to read and write this. Are the fields documented? Are there protections, check sums all that stuff?
Hornnumb2:
Using the 866II plus, I have a test clip on it and it says it’s reading it but just shows FF in all spots. So I don’t know if it’s protected or I just need to take it out of circuit. Once I can get some info on the screen I just change the vin number and rewrite.
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