Memory mapping for MC9s12xea

[maddela_sai-tir]

Hi team,

We are using  MC9S12XE micro-controller  and in the data sheet 128kb is splited in to two 64kb. pls help us how to reconfigure the Memory map . we want to create seg for Boot loader.

[dianabatrlova]

Hi Maddela,

From your description, I assume your MCU has 128 KB of Flash. In this case, 128 KB of the P-Flash is divided into two 64 KB blocks.

Each block is divided into 64 sectors of 1024 B.

See Appendix D Derivative Differences Table D-1. and chapter 24.1.2.1 P-Flash Features in the reference manual.

You can find the memory maps for S12XE devices in the attachment.

Very good start for programming bootloader for S12X MCU is AN4258 - Serial Bootloader for S12(X) Microcontrollers Based on 180 nm Technology

The software is located on this link:
 http://www.nxp.com/files/microcontrollers/doc/app_note/AN4258SW.zip 

I hope it helps you.

Best regards,

Diana