标题: 求教有关memory card内的设计 [打印本页] 作者: onezoneone 时间: 2008-7-5 01:37 标题: 求教有关memory card内的设计 如果有个contrroller FCE#和FRB#不止一个，例如FCE[0-4],FRB[0-1],现在这个controller只控制一个flash，而这个flash里面只有FCE0,FRB0,那么是否controller上FCE1,FCE2,FCE3,FRB1可以开路，不作任何连接？ 1 Q! R% y! [8 f$ f! I; w谢谢作者: onezoneone 时间: 2008-7-6 19:19
no body know?作者: kxx27 时间: 2008-7-7 11:04
提示: 作者被禁止或删除 内容自动屏蔽作者: r_agreement 时间: 2008-7-7 12:21
Pls reading the spec. of controller carefully! & u% N( A& X7 z: P% d2 w! G r4 d
Maybe you can get some useful info. from the spec. as following ：% ]3 H- C8 I- _4 v; v
1、FCE= Flash Chip Enable , they're output pins...." _ O/ I. G; X- M5 y; J
2、FCE[0-4] means your controller can drive 5 pcs of flash max. 9 U8 C8 j H9 g! f6 W+ y0 V3、FRB = Flash Read Busy, they're input pins...（output from Flash）0 Z! P) I' Q T2 K' k: p
So ,we can know:1 P; m; k1 k& t1 ~5 @
1- if use only one Flash, the other FCEs can be NC. (Not Connected)5 c3 h" ?5 [7 p
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/down7 \# p# O; v/ f( h) |( b
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nnd，好痛苦英语，太郁闷了。。。。作者: onezoneone 时间: 2008-7-8 23:30
谢谢有点概念了，总之有地方的话我就空出地方预留