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您好,0 W1 e3 w5 `9 ^5 c8 N* f
下面列出CIC提供的TSMC 0.35 I/O PAD,請問如果我的IC要接受外面一顆48MHz的crystal送過來的clock訊號要用哪一個PAD比叫好?
9 Q" w: _0 j4 {PDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring
" Q1 Y3 [1 `& g1 W% z8 xPDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant
! E6 S& C5 \' X9 ]( X' NPDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant
8 q. [2 G+ b8 r2 {7 h DPDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant# V9 z+ O& Y X
PDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring y6 L5 g3 Q* q6 }6 O
PDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power
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2 W' n- ?( Z& G' bPDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,
. k k5 Z( x0 V" z, f* F而晶片是 PAD limit$ T' I( ~9 E/ b/ [0 y1 y
B/R( {. `/ w$ G* t+ m# \% |% P
Jerry Yau
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! j4 A, L. L( F e0 S# W[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
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