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您好,8 H. M: f5 ]0 N5 T/ z: ]% Q
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?
' s$ W+ Y+ \$ k1 l9 \' @% IPDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring# f( y6 d$ Z- N6 d& n- q& J
PDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant1 T/ B0 T( T5 l4 F
PDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant0 {# P, r' {2 c9 d7 S
PDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant" H7 D+ H4 p# G
PDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring9 `2 p! k/ `- ]% a$ v/ ]
PDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power+ d, T! u" v! W" X9 [1 r! A/ E
; u' t0 V4 w9 k" W/ i4 a' G* W1 x- xPDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,+ Z( R0 p& a7 r6 h* I) q) @
而晶片是 PAD limit
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7 U$ c5 K7 \$ Q/ {. h- }Jerry Yau- f+ b; D+ i% _
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[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
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