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XRT71D04 Datasheet(PDF) 20 Page - Exar Corporation

Part No. XRT71D04
Description  4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER
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Maker  EXAR [Exar Corporation]
Homepage  http://www.exar.com
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XRT71D04 Datasheet(HTML) 20 Page - Exar Corporation

 
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XRT71D04
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4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER
REV. 1.1.1
19
NOTES:
1. A5 is always “0”.
2. R/W = “1” for Read Operations
3. R/W = “0” for Write Operations
4. Denotes a “don’t care” value (shaded areas)
3.1.7
Simplified Interface Option
The user can simplify the design of the circuitry con-
necting to the Microprocessor Serial Interface by ty-
ing both the SDO and SDI pins together, and reading
data from and/or writing data to this combined signal.
This simplification is possible because only one of
these signals are active at any given time. The inac-
tive signal will be tri-stated.
FIGURE 9. MICROPROCESSOR SERIAL INTERFACE DATA STRUCTURE
D0
D1
D2
D7
D6
D5
D4
D3
High Z
SDO
A0
D0
R/W
D1
A6
0
A4
A3
A2
A1
D7
D6
D5
D4
D3
D2
SDI
1234567
89
1 0
1 1
1 2
1 3
1 4
1 5
1 6
SClk
CS
High Z
FIGURE 10. TIMING DIAGRAM FOR THE MICROPROCESSOR SERIAL INTERFACE
SDI
R/W
A1
A0
CS
SClk
CS
SClk
SDI
SDO
D0
D1
D2
D7
t22
t21
t23
t24
t25
t26
t27
t28
t29
t30
t31
t32
t33
Hi-Z
Hi-Z


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