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您好,
& l- `) p& u& k) h. l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?* X2 B% ^4 q( I# v' y
PDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring
# G, O: K& I( k9 a- \PDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant
3 r9 h7 E/ P7 ePDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant6 @" G" R! L6 x+ E" ?/ p' M% b/ M
PDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant
* ]" V3 o) K( n2 MPDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring
- j. G/ Q; ^7 g! q, A5 d+ GPDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power
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PDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,& R9 y/ F" o) ?& I. c& R f
而晶片是 PAD limit
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( h- u0 s/ H# Z+ u0 \- n- P9 FJerry Yau+ m1 u/ x7 f$ [
4 K: n* ` M2 u. [+ L: x[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
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