Reading the calibration code 12F629

[Yomi]

Can someone tell me please how can I read the calibration value from a new 12F629 device?
I use the CCS : ICD-U40 latest version.
If I don't write to this address just download my program, does the ICD-U40 erase the calibration value?

Thanks.

[Mark]

It is the last program memory address. Most if not all programmers and ICD's protect this location for you. That is, they read the value, erase the chip and reprogram it back.

[yomi]

Mark,

Thanks for your reply.
Isn't there a way just to read the value (without changing it)?
Is this code necessary:

[Mark]

That is the code required to put the value in the OCCCAL reg. What is your goal?

[Yomi]

The goal is to keep the calibration frequency after I download my code, or after complete erase of the chip.

[Mark]