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Pls reading the spec. of controller carefully! * H# Y8 y# i: P; x6 H" B% E3 |
Maybe you can get some useful info. from the spec. as following ：& T3 y6 \' e/ D9 W
1、FCE= Flash Chip Enable , they're output pins....
; z- O2 r$ M. P- i% |, A2、FCE[0-4] means your controller can drive 5 pcs of flash max.
8 s- w# l! O J/ h) ^3、FRB = Flash Read Busy, they're input pins...（output from Flash）$ }3 ]5 j- ]" b- Z' k8 b: _
So ,we can know:8 _ Q5 k# g# k6 V2 t$ _
1- if use only one Flash, the other FCEs can be NC. (Not Connected)
0 J8 V0 E; X- H1 l! Q2- 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
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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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