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？ - D) x+ o) I5 _) A% |: X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! : p1 e. g3 e' ]Maybe you can get some useful info. from the spec. as following ：2 P! j; N: ~" G) ~0 `* J
1、FCE= Flash Chip Enable , they're output pins....5 i* G0 h- D. Y; ?
2、FCE[0-4] means your controller can drive 5 pcs of flash max. o) N7 a& R9 H& t A
3、FRB = Flash Read Busy, they're input pins...（output from Flash） ' J- m9 F2 G5 b2 z; C+ G7 o5 c: ^So ,we can know: 3 x, y% d$ q1 G7 G3 B* R2 [+ J1- if use only one Flash, the other FCEs can be NC. (Not Connected)1 F ?$ h" F, L7 Q
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 4 p* f3 e' D# F' z$ W( W: D4 _7 g2 u. Z; h# [2 b
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