How do I figure out the which CPU the Sony DPF C-1000 has?

Question

Recently I received a Digital Photo Frame (Sony C-1000) and since I'll never use it as it is, I thought of playing with it and reprogram it. Anything like managing to print out to screen "Hello world" would be a win.

I'm trying to understand which CPU is used; next step would be how to access it. Any hint would be great, because I'm not experienced with hardware. I opened the device thinking I'd see the CPU, with its model written on top. I think I identified the processor, but the code written on its top did not help me.

Thanks for any pointers.

On top of what it looks like the CPU reads: G+ SPMF2892A M0023520 1124

A piece that I could identify is the RAM: EtronTech EM639165TS-6G N48AG05AGB640.12ZQ

Answer 1

Ok.. so here is what I gather. Which leads me to this GeneralPlus link.

Looks like it has these interfaces:

JPEG codec, 6-in-1 card I/F and digital panel I/F

On that generalplus page if you click on the title of the chip you get a blank frame. The source for that frame has a bit of content in it. After looking through the html code of thier site I found spec listings that failed get filled out as well as php generated datasheet download links that also are messed up.

I imagine if you email them they might possibly send you the link worth a shot at least.

broken html 1

broken spec table

Answer 2

From looking at firmware updates for some other Sony frames, the processor seem to be mostly 8051 derivatives. A couple of them expect files with names like ISP.vup and VISP.vup. You could try putting such files on a card and seeing if you can trigger the firmware update mode (but don't update it!). If this works, you can investigate the firmware update and try to write some simple code that would run instead.