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您好,9 I7 `- r. P, I4 D# t% P5 m
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?
a0 q- D* O! T9 M4 B" b. h2 LPDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring0 B( g. ?# Q% f
PDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant6 d$ E1 j: s$ g
PDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant
$ t! v" p g+ X0 H6 PPDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant9 U* H& O, a7 `! P' ~
PDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring
9 j2 v+ Q+ l7 A- ], j# l3 }PDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power
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# b% f- G( C) Y0 O: `6 GPDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,
' |$ j7 ]* X# x" S1 \而晶片是 PAD limit
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6 h: S+ {$ u( F; `3 X' eJerry Yau
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5 Q2 l+ i0 }' A+ t4 k9 R[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
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