How to retrieve the TRIM Value from MC908QY4?

[Harlen_CHen]

Hello veryone,

Because reprogram the QY4, Erase the mass FLASH of QY4 internal . The 0xFFC0 (Store  Trim value) have been changed to 0xFF. Now the time is not accuracy . How to retrieve the factory TRIM Value?

[JohnnyP]

If you didn't write it down, you will have to re-create it.

App note 2496 and 2498 may help:
http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=01624684499713FORMAT=pdf&WT_ASSET=Docum...

[peg]

Hi,

I'll just add AN2312 to that list.