topic Re: Data Compress functionality in Flash in S12 / MagniV Microcontrollers

Data Compress functionality in Flash

blood — Thu, 07 Sep 2006 06:53:17 GMT

I am useing a 9S12E256 and there is a flash command for "Data Compress" to check the data integrity.

Does anyone know the algorthim that this uses, as I would like to calculate the expected signature from an srecord and then add that in to the srecord. This way I can use it to check that the code was loaded correctly.

Re: Data Compress functionality in Flash

DanielM — Thu, 07 Sep 2006 20:31:05 GMT

Hi,

E256 does not have a data compress command (at least according to the manual I have). My manual lists the following commands:

$05 Erase Verify
$20 Word Program
$40 Sector Erase
$41 Mass Erase

and nothing else.

Daniel

Re: Data Compress functionality in Flash

blood — Fri, 08 Sep 2006 02:48:17 GMT

$06 data compress

$47 sector erase abort

Version 1.08 of the datasheet has the command in section 2.4.1.3.2

Re: Data Compress functionality in Flash

DanielM — Fri, 15 Sep 2006 21:17:48 GMT

Hi,

sorry I was looking at the wrong document. I will try to dig this info out.

Daniel

Re: Data Compress functionality in Flash

blood — Mon, 18 Sep 2006 02:51:36 GMT

Hi,

I have now got the info from freescale. I have attached the missing part from the manual.

Note that this is different to that for the S12XDP512 device.

William