LPC MicrocontrollersのトピックRe: EEPROM content after manufacturing

EEPROM content after manufacturing

lpcware — Wed, 15 Jun 2016 18:23:03 GMT

Content originally posted in LPCWare by BlackJack on Thu Apr 24 01:41:50 MST 2014
Hello,

I am using the LPC1837 and the internal EEPROM. Unfortunately, I can not find any information in the UM10430 about the EEPROM content after the manufacturing.
Which content will have every EEPROM cell after the manufacturing? 0x00000000, 0xFFFFFFFF or totally out of order values (not defined)?

In which document can I find this information?

Best regards

Re: EEPROM content after manufacturing

lpcware — Wed, 15 Jun 2016 18:23:05 GMT

Content originally posted in LPCWare by drs on Fri Apr 25 14:18:06 MST 2014
The content of EEPROM after manufacturing is all 0's.

We will update the data sheet to show this. Thanks for the heads up!

Re: EEPROM content after manufacturing

lpcware — Wed, 15 Jun 2016 18:23:06 GMT

Content originally posted in LPCWare by John Sinclair on Tue Apr 29 02:03:23 MST 2014
Hello drs,

so we can't find the information, we did a lot of test.
The EEPROM mostly have 0's but sometimes there are bit with 1's.
So we delete the EEPROM in manufacture to ensure all bits are 0.
Sincerely

John Sinclair

Re: EEPROM content after manufacturing

lpcware — Wed, 15 Jun 2016 18:23:06 GMT

Content originally posted in LPCWare by drs on Fri May 02 13:54:04 MST 2014
Hi John,

The EEPROM should definitely be all 0's. The fact that they are not is a red flag for us and I would like to investigate why this is happening.

In the interest of improving quality would you be able to provide me with some additional details about your situation?
1. What is the chip markings of the parts that you are seeing this on?
2. How many parts are effected this way?
3. How many bits in the effected parts are not 0's?

Any information along these lines would be greatly appreciated.

Thanks
Dale