topic Re: MC9S12DP256B EXTERNAL RAM in S12 / MagniV Microcontrollers

MC9S12DP256B EXTERNAL RAM

Vicky — Tue, 07 Feb 2006 14:58:58 GMT

Hi,

I am using MC9S12DP256B...

1. Internal Flash from 0x8000 to 0xBFFF.

2. External RAM of 64K from 0x4000 to 0x7FFF.

To access 256K of flash, I am using paging i.e. 0x30 to 0x3F.

My query is:

1. How prm file will be changed to support external RAM.

2. is any thing else has to be done other configuring the system to be in expanded mode???

Message Edited by Alban on 02-10-2006 08:31 AM

Nabla69 — Fri, 10 Feb 2006 16:36:50 GMT

Hi Vicki,

2- Yes, as there is only one Page Pointer, you need a special routine to execute your software from paged Flash when read paged RAM.

Cheers,
Alvin

Nabla69 — Fri, 17 Feb 2006 20:53:11 GMT

Actually the file was not included there, so here is the project !

Enjoy,

Alvin.