Rockbox mail archive
Subject: I finally got SST39 flash chips
now I can flash my box, too. Before I had borrowed/exchanged the CPU PCB
with a friend.
After a lot of suspense, I got 5 samples of SST39VF040 chips in the
necessary TSOP32 package. I've soldered one into my box, see here:
Another one I'd like to keep as spare, the remaining three I can offer to
1) have the wrong kind,
2) are so desperate to flash that they would do this difficult mod
3) are skilled to do it (I used a stereo microscope and a fine solder
4) have or can do the serial mod including level converter, plus UART boot
This really is not for beginners. It requires to separate the boards,
because the flash is on the inside. The chip itself has 0.5 mm pin grid, the finest
I've ever worked on. To program it, you either need a programming device
capable of that chip in that package, or the UART boot mod, which in turn
requires the serial mod. I went the latter way, proving once again that the UART
boot can work you up from an erased chip. I will document this mod with a
So, once again, if you are really capable and will actually do this, contact
me. The chips were hard to get, I'd like to give those only to people were
they won't settle dust. (And I don't want them to settle dust at my place
Is there's anybody with access to a suitable programming device (including
TSOP32 adapter)? That could make it easier for the folks following this, we
could prepare the chip, no need for the serial stuff then.
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Page was last modified "Jan 10 2012" The Rockbox Crew