參數(shù)資料
型號: PCT789T-A
英文描述: PCI HSP56 World MicroModem/PCT303DW/PCT1789W
中文描述: 世界MicroModem/PCT303DW/PCT1789W的PCI HSP56
文件頁數(shù): 58/70頁
文件大?。?/td> 872K
代理商: PCT789T-A
PC-TEL, Inc.
58
1789W0DOCDAT06A-0299
PCT1789W DATA SHEET
S
WITCHING
C
HARACTERISTICS
!
PRELIMINARY
PRELIMINARY
Serial Interface (DCE = 1, FSD = 1)
Given values are: V
A
= charge pump, V
D
= +3.3 V ± 5%; T
A
= 70 °C for K-grade, 85 °C for B-grade; C
L
= 20 pF.
All timing is referenced to the 50% level of the waveform. Input test levels are: V
IH
= V
D
– 0.4V, V
IL
= 0.4V.
Table 27 Switching Characteristics—Serial Interface (DCE = 1, FSD = 0)
Figure 19 Serial Interface Timing Diagram (DCE = 1, FSD = 1)
Parameter
Cycle time, SCLK
Symbol
t
c
t
dty
t
d1
t
d2
t
d3
t
d4
t
d5
t
su
t
h
t
su2
t
h2
Min
354
Typ
Max
Unit
ns
1/256 Fs
SCLK duty cycle
50
%
Delay time, SCLK
to FSYNC
Delay time, SCLK
to FSYNC
Delay time, SCLK
to SDO valid
Delay time, SCLK
to SDO Hi-Z
Delay time, SDO before RGDT
Setup time, SDO before SCLK
Hold time, SDO after SCLK
10
ns
10
ns
0.25t
c
–20
0.25t
c
+20
20
ns
ns
20
ns
25
ns
20
ns
Setup time, SDI before SCLK
25
ns
Hold time, SDI after SCLK
20
ns
D15
D14
D1
D0
t
su2
t
h2
D15
D14
D13
D0
SCLK
FSYNC
(mode 1)
SDO
(master)
SDO
(slave 1)
FSD
SDI
D15
t
d5
t
d3
t
d4
t
su
t
h
t
d3
t
d2
t
d1
t
c
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