S12 / MagniV MicrocontrollersのトピックFlash programming

Flash programming

marchè — Tue, 20 Jun 2006 19:51:31 GMT

Hi..

When the micro is in the secure state, Can I program the flash memory from within the bootloader?

Or the bootloader must leave the micro in unsecured state?

Thanks...

Re: Flash programming

imajeff — Tue, 20 Jun 2006 20:38:18 GMT

AFAIK, If there are no errata stopping it, then the bootloader can have full rain on the Flash within secure mode. In fact, if it were not able to erase Flash, then the MCU could not be unsecured so it is in the design.

Re: Flash programming

Lundin — Mon, 26 Jun 2006 17:57:03 GMT

There is an errata stopping it for the old "B" masks:

In normal single chip mode, when security is enabled, it is not possible to launch the Program ($20), Sector-Erase ($40) and Erase- Verify ($05) commands in the Flash. The Mass-Erase ($41) command can be launched.

Same goes for EEPROM.

Re: Flash programming

Ilocano — Wed, 05 Jul 2006 02:12:51 GMT

With the 9S12C32 in secure mode it is possible to erase and program FLASH. I added things to the SErial mon for this purpose.