topic Re: Using flash routines out of ROM (MC68HC908QC16) in 8-bit Microcontrollers

Using flash routines out of ROM (MC68HC908QC16)

mahamba — Thu, 03 Aug 2006 20:59:53 GMT

Does anyone know how to use the flash erase/program routines for the MC68HC908QC16 which does not have the flash burn in routines in ROM. So far I know that the routines cannot be in flash as it is locked during program/erase operations. Do they have to be copied in RAM?

Re: Using flash routines out of ROM (MC68HC908QC16)

RockyRoad — Thu, 03 Aug 2006 22:07:07 GMT

mahamba -

The flash programming routines are in ROM on the QC16. They are the same as for the QB16 as documented in AN2635.

http://www.freescale.com/files/microcontrollers/doc/app_note/AN2635.pdf

- Rocky

Re: Using flash routines out of ROM (MC68HC908QC16)

Truk — Fri, 04 Aug 2006 00:08:59 GMT

are this routines also usable for the MCS08 (MCS08AW32) ?

regards

Truk

Re: Using flash routines out of ROM (MC68HC908QC16)

mahamba — Mon, 07 Aug 2006 22:06:44 GMT

Thank you Rocky. So they are in the auxiliary ROM.

Re: Using flash routines out of ROM (MC68HC908QC16)

irob — Tue, 08 Aug 2006 22:56:51 GMT

Truk wrote:
are this routines also usable for the MCS08 (MCS08AW32) ?

Truck, I don't think so, but I'm not positive. I know that for my part, MC9S08QG4, those routines are not in the ROM. In fact, as far as I understand, the flash system works completely differently on the S family with the BDM command interface. No need for the old ROM routines.

Message Edited by irob on 2006-08-08 09:57 AM

Re: Using flash routines out of ROM (MC68HC908QC16)

Alban — Wed, 09 Aug 2006 01:14:31 GMT

Yes Irob I confirm,

S08 does not need any Flash programming routine as the user has a simple state machine with commands to send.

Cheers,
Alban.

Re: Using flash routines out of ROM (MC68HC908QC16)

Truk — Wed, 09 Aug 2006 21:34:55 GMT

I think I have expressed myself bad:

I would like to use a part of Flash as EEPROM to store approx. 150 Bytes SETUP-Data which are read bevor via the SPI Interface in RAM.

Is that possible

regards

Truk

Re: Using flash routines out of ROM (MC68HC908QC16)

Alban — Wed, 09 Aug 2006 21:51:41 GMT

No problem at all to store data in Flash !

The only thing when erasing Flash is you erase a PAGE and need to write by ROWS. If the area is not secured, you can use the state machine included in the S08 Flash block without any trouble !

Cheers,

Alban.

Re: Using flash routines out of ROM (MC68HC908QC16)

Truk — Thu, 10 Aug 2006 16:41:54 GMT

thank you for help Alban,

but I need a little more hints how to do this.

Can I do this as descibe in the data sheet on page 51 - 53 (MCS08AW60) ? ...that means the user programm in the rest of the flash is working and can run all the time (not as describe in a AN where I have to run the programming routines in RAM because flash is not working in this time).

Are there allready assembler routines available?

Do all S08 have the same state machine ? (I have an other project with a smaller and therefore cheaper uP which I have not selected at the moment)

thanks for any help, because this is the first project with CW and HC08/S08 there is really a lot new for me..

Truk

Re: Using flash routines out of ROM (MC68HC908QC16)

peg — Thu, 10 Aug 2006 17:26:30 GMT

Hi Truk,

All S08 are pretty much the same in this regard.

This subject has been covered many times in this forum, I would suggest you search for it as you will have more patience than I. There have been numerous code examples given.

It is really quite simple, the hardest part for most people attempting this is to correctly move code to RAM and execute it from there.

Regards David

Re: Using flash routines out of ROM (MC68HC908QC16)

robidp82 — Thu, 11 Jan 2007 23:26:50 GMT

Hello RockyRoad,

the AN linked by you does not specify the address of the internal routines for the QC16.
In addition, the QB16 microcontroller does not exists. Are you sure that the routines are at the same address of the QB family?

robidp82