MC9S12DP256B EXTERNAL RAM

[Vicky]

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]

Hi Vicki,

1- Your prm file as to be modified according to thread http://forums.freescale.com/freescale/board/message?board.id=16BITCOMM&message.id=140 Reply from Alban.

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]

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

Enjoy,

Alvin.