[U-Boot-Users] Intel StrataFlash 28F128J3 vs. 28F256K3
Craig A. Vanderborgh
craigv at voxware.com
Tue Dec 21 07:50:52 CET 2004
I am bringing up u-boot on a new revision of our board and I am having a
problem with flash. Both boards have share *exactly* the same
schematic, with just one difference. The newer board has 2 Intel
28F256K3 flash chips in a single bank versus 2 Intel 28F128J3 flash
chips in a single bank on the older board.
I am inexperienced with this flash stuff, so bear with me. What I am
seeing is very strange. The board comes up, and everything works except
flash. u-boot comes up, serial works fine, DRAM works fine. Flash does
not work right. Here is what I am seeing.
1. Using JTAG, I can program the 1st sector of flash successfully. This
works and I am using this mechanism to boot the board.
2. Using JTAG or u-boot flash commands, erasing appears to work for all
sectors > sector 0. Programming does NOT work. The low-order bits (for
bytes 1&2) are programmed correctly. The high-order bits (for bytes
3&4) are LOST, and thus every 32-bit word contains "ff" as the
high-order bytes after programming.
I have made ABSOLUTELY CERTAIN that all my PXA register settings are
correct. The same flash code (within u-boot) works correctly on the
older board (with the J3's). I am very stuck - and I would appreciate
some help. I have spent a vast amount of time on this problem and I
would dearly love any bone that might be tossed from the U-Boot gurus.
Thansk in advance,
More information about the U-Boot