|
您好,
, a# O. c4 ?8 J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?
/ k$ }6 s* M0 e7 E$ n- r* v& ]PDCHxSM : Very Fast Schmitt Trigger Non-Inverting Clock Input Pad,5V-Tolerant, Connecting VDD5V Power Ring" ]# ~5 m: m+ J9 Q& U
PDCHxSZ : High Drive, Schmitt Trigger Input Clock Pad, 5V-Tolerant
3 `) e. b* L5 _+ rPDCHxTZ : High Drive, TTL Input Clock Pad, 5V-Tolerant
! k5 y) A' N1 P8 _0 s, y1 S7 SPDCxTZ : Very Fast TTL Non-Inverting Clock Driver, 5V-Tolerant+ V( E3 g( ?: b# S
PDIM : Input Pad, 5V-Tolerant, Connecting VDD5V Power Ring
- f4 R ?( T E% EPDISM : Schmitt Trigger Input Pad, 5V-Tolerant, Connecting VDD5V Power
) a3 P! K* I* z8 D0 S. j/ G( B0 C" A1 C. ~! s3 n9 b, v U. j( c
PDCHxSM,PDCHxSZ,PDCHxTZ and PDCxTZ需要2個PAD windows,其他只要一個PAD windows,
# h6 L9 U- U4 y2 W* {' K而晶片是 PAD limit
3 H& ^/ S4 b0 j0 c% {* EB/R
. Z7 z C7 m- l6 A& ~7 JJerry Yau
" k0 I8 H& N2 j+ O* a8 V- d5 a4 j# o! q4 X+ z1 o( m8 _. H3 P9 d
[ 本帖最後由 jerryyao 於 2009-5-8 02:48 PM 編輯 ] |
|