参数资料
型号: ACS8509
元件分类: 数字传输电路
英文描述: ATM/SONET/SDH SUPPORT CIRCUIT, PQFP100
封装: LQFP-100
文件页数: 57/68页
文件大小: 703K
代理商: ACS8509
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 2.00/January 2006 Semtech Corp.
Page 60
www.semtech.com
ACS8509 SETS
Figure 22 Write Access Timing in SERIAL Mode
Table 38 Read Access Timing in SERIAL Mode (For use with Figure 21)
Symbol
Parameter
MIN
TYP
MAX
tsu1
Setup SDI valid to SCLKrising edge
0 ns
-
tsu2
Setup CSBfalling edge to SCLKrising edge
160 ns
-
td1
Delay SCLKrising edge (SCLKfalling edge for CLKE = 1) to SDO valid
-
17 ns
td2
Delay CSBrising edge to SDO high-Z
-
10 ns
tpw1
SCLK Low time
CLKE = 0
CLKE = 1
250 ns
500 ns
--
tpw2
SCLK High time
CLKE = 0
CLKE = 1
250 ns
500 ns
--
th1
Hold SDI valid after SCLKrising edge
170 ns
-
th2
Hold CSB Low after SCLKrising edge, for CLKE = 0
Hold CSB Low after SCLKfalling edge, for CLKE = 1
5 ns
-
tp
Time between consecutive accesses (CSBrising edge to CSBfalling edge)160 ns
-
Table 39 Write Access Timing in SERIAL Mode (For use with Figure 22)
Symbol
Parameter
MIN
TYP
MAX
tsu1
Setup SDI valid to SCLKrising edge
0 ns
-
tsu2
Setup CSBfalling edge to SCLKrising edge
160 ns
-
tpw1
SCLK Low time
180 ns
-
tpw2
SCLK High time
180 ns
-
th1
Hold SDI valid after SCLKrising edge
170 ns
-
th2
Hold CSB Low after SCLKrising edge
5 ns
-
tp
Time between consecutive accesses (CSBrising edge to CSBfalling edge)160 ns
-
ALE=SCLK
CSB
R/W
Output not driven, pulled low by internal resistor
A(0)=SDI
AD(0)=SDO
tsu2
tsu1
th1
tpw1
tpw2
_
A0 A1 A2 A3 A4 A5 A6
th2
D0 D1 D2 D3 D4 D5 D6 D7
F8110D 014W it A
S i l 02
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