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发表于 2008-4-13 12:26:41
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IDSEL是LPC spec的一个信号(Device Select),
% n$ J7 M1 M% Z6 k7 v7 ~+ fThis one clock field is used to indicate which of multiple Firmware components is being selected.
4 S' U3 P \+ g* q$ o( V; O# N5 dThe four bits transmitted over AD[3:0] during this clock are compared with values strapped onto- R& X% L: S: q- N: I/ e: B
pins on the Firmware component. If there is a match, the Firmware component will continue to6 i2 |7 ^! X( Q( Q7 }
decode the cycle to determine which bytes are requested on a read or which bytes to update on a, p* [1 h* g- |1 V2 c( m
write. If there isn’t a match, the Firmware component may discard the rest of the cycle and go into7 Z6 t8 I4 q4 v; y" F
a standby power state.
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9 `8 Z& y; {1 K* c详见LPC spec:4 O. c$ n5 X) b; @7 V: W4 o
http://www.intel.com/design/chipsets/industry/25128901.pdf* y! M& V& ~- Y+ J( v
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在ICH 7 中似乎就这几个吧(FWH_SEL1,FWH_SEL2,FWH_DEC_EN1,BIOS_CNTL),据我现在知道的. |
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