On Thu, Apr 12, 2007 at 06:09:59PM +0200, ST wrote:
I am still puzzled how the second flash chip is to be used on the GA-M57SLI-S4 board.
Without further investigation of the board, noone but Gigabyte can say how it's supposed to be used.
As Peter mentioned LPC is used on this board. Would it be enough to use the flash chips (for programming and reading) to just disable one chip with the #init signal?
Yes, sure.
It seems as if only one of the chips gets the #init to low, the other one will stay in reset mode and will keep its I/O pins in Z state?
Yes, but the question is what, if anything, controls the second INIT#. The patent suggests a timer circuit, but your measurements show that perhaps the timer circuit is just not there on production boards.
One solution is of course to not connect the two INIT# to the pads on the board, but to a separate switch circuit.
Desoldering a single PLCC pin is not impossible with a little care.
//Peter