topic Re: Writing data flash of MPC5606B through JTAG interface using Nexus. in MPC5xxx

Writing data flash of MPC5606B through JTAG interface using Nexus.

danielflor — Tue, 16 Jan 2018 11:44:12 GMT

I'm programming flash memory of MPC5606B through JTAG interface using Nexus. I'm imitating a tool that perform this task. However, in the middle of the process, the entire flash memory is erased. I skipped this part in code, but, when I do this, the write to memory does not work. Of course I have a backup of the memory, but, I was wondering, to allow programming the data flash is necessary to erase a block memory? I mean, the procedure is a bit long, so, I was wondering if I can just to write in memory positions.

The tool makes a selection of 4 blocks of 16kB to be erased, it is the entire dataflash of MPC5606, 64kB. So, I can erase only 16kB instead of 64kB, but, my doubt is, is really necessary to erase a block of 16kB, or the entire memory of 64kB, just to write some bytes , for example 16 bytes, in the flash memory ?

I looked about this information on adtasheets and documents and I didn't find nothing.

With my bests regards ,
Daniel.

Re: Writing data flash of MPC5606B through JTAG interface using Nexus.

andreyabramchuk — Mon, 22 Jan 2018 14:08:52 GMT

Hi, Daniel!

In common case, not necessary to erase flash before it writing. But when you access via jtag, there is no possibility to write flash directly. So you download a peace of code into cpu RAM. Then this peace of code executes secuence: erase and write...

Daniel, what tool are you using for access via JTAG? I am looking for such a tool for MPC5606.

BR!

Andrey

Re: Writing data flash of MPC5606B through JTAG interface using Nexus.

danielflor — Fri, 06 Apr 2018 14:56:21 GMT

I know that UPA-S can read.