|
您好,5 ?/ _) ~2 v) `% |1 \8 T( ]
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?
! |7 G. q8 p8 |- oPDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring+ R. n' R+ u6 i, T p I- \8 c
PDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant
1 r) `! F o3 X3 M% wPDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant" n- j% a* R- G Y: B- e) b9 w
PDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant
% v5 B% l: ~, H QPDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring1 Q$ U8 d$ M4 ]
PDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power* j# @4 E( S7 G9 Y7 Q2 [
( g& R4 A" d/ m& z: F j, u
PDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,
0 ~; B' x% e" | i" @$ J( F) _而晶片是 PAD limit
2 q5 p" N( Z0 D: T' AB/R
: w. W( V( j2 R( I( ?: d5 Z: J" dJerry Yau$ I* @, v7 L6 O4 b
/ m0 ?. v9 g4 s- b9 l* X[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
|