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您好,
1 E. s# b u$ x/ P3 V* b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?
G7 G, w$ g$ x& PPDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring
( T6 J Y" t; I* _/ _0 t6 K' DPDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant3 Z" o! m* ]1 o# R
PDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant
3 w5 I0 q2 i3 P7 ePDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant
3 @/ [1 u- f$ |% Q) c; _" w |: gPDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring0 y; Z) `+ A5 o
PDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power( k! L- U7 g6 Q1 \8 c/ A$ Q
2 l" `4 R* u$ Q3 F! _$ n9 F1 EPDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,* R! ~; m* s0 }0 e7 `+ m
而晶片是 PAD limit+ e6 f5 \8 T5 C- \4 m' [
B/R
1 T! Y. S' m( ^0 |; W bJerry Yau
7 D: o' x$ m8 }5 l4 N: ~# A9 `2 M# R5 W+ [3 K( N
[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
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