MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 SST49LF008A in-circuit programing?

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T O P I C    R E V I E W
nijel8 Posted - 07/12/2009 : 16:43:35
I just got my GQ-4X and have some questions.
My bricked laptop has bios chip FWH SST49LF008A-33-4C-WHE in TSOP32 package soldered. Here is the datasheet h**p://www.sst.com/downloads/datasheet/S71161.pdf.
I discovered undocumented 10-pin service port connected directly to the FWH chip pins as fallows:
1-???
2-Vdd (3.0-3.6V)
3-FWH0
4-FWH 1
5-FWH 2
6-FWH3
7-FWH4
8-CLK
9-RST
10-Vss(circuit ground)
I couldn't trace pin 1 to the chip (any idea?), but I guess the port is for in-factory bios recovery.
I have FWH/LPC+ Adapter V2.1
Can I in-circuit reflash the chip using this adapter connected to those pins? Also does GQ-4X use FWH protocol mode when programs FWH chips?
1   L A T E S T    R E P L I E S    (Newest First)
ZLM Posted - 07/12/2009 : 22:15:26
The programmer uses parallel mode to program the FWH chip, not the FWH mode.
I think the FWH mode programming need more pins to control than those 9
pins on the port.

So, the chip need to be placed in a FHW TSOP32 adapter for the programming.

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