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Pls reading the spec. of controller carefully!
/ X8 z$ b {, P! D- O/ u- y% xMaybe you can get some useful info. from the spec. as following ：
C `: L! p4 k8 d1 S. a5 {1、FCE= Flash Chip Enable , they're output pins...." S! L4 x) I9 ~5 L' n) D7 X
2、FCE[0-4] means your controller can drive 5 pcs of flash max.
) Z& L' _7 V' \- g" w/ L3、FRB = Flash Read Busy, they're input pins...（output from Flash）) p0 \3 V5 B* [" _
So ,we can know:3 {+ {: A+ ^: |8 e& [9 Q/ v2 W
1- if use only one Flash, the other FCEs can be NC. (Not Connected)8 C; d+ Z q4 `! |( U" f6 C% [* b+ H
2- maybe you can't left the FRB1 float, if you're not sure,you can phone the FAE of the controller or put some NC.RES to pull-up/down/ R: C" ]' ~8 f& f; }& @) j' |
: a- c" |0 {/ t% u6 |. j9 R( {nnd，好痛苦英语，太郁闷了。。。。 |
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发表于 2008-7-5 01:37
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