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您好, {, E- u+ @( _
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? d) Q3 P5 }0 d( U! L: q' k4 G$ ^
PDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring. i; k; |, H7 V a6 J8 i
PDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant
8 D G2 e" x F" n9 WPDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant3 I3 E& G& x4 x; M4 \
PDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant% f% O- Z! S4 n$ i' {5 V- r
PDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring
+ p5 r: T& w3 L1 x4 J- [+ e& y& @PDISM : 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,: z: t4 c, Z$ G* L( Q8 Y6 B0 \& S
而晶片是 PAD limit
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Jerry Yau8 c7 I- R' ]7 E* y I7 T3 z1 P
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[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
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