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GS2985 Datasheet(PDF) 31 Page - Semtech Corporation

Part # GS2985
Description  Multi-Rate SDI Reclocker with Equalization & De-emphasis
PDF  45 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

GS2985 Datasheet(HTML) 31 Page - Semtech Corporation

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GS2985 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
36663 - 5
July 2012
31 of 45
Proprietary & Confidential
Figure 4-8: SPI Write Timing
Figure 4-9: SPI Read Timing
R/W
0
R
C0
C1
C2
C3
C4
C5
C6
A0
A1
A2
A4
A3
D15
D14
D13
D12
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D11
D10
SCK
CS
SDI
32 cycles
delayed
SDO
t0
t3
t1
t2
R/W
0
0
C0
C1
C2
C3
C4
C5
C6
A0
A1
A2
A4
A3
D15
D14
D13 D12
D
D2
D3
D4
D5
D6
D7
D8
D9
D11
D10
t8
t6
0
R
R/W
0
0
R
C0
C1
C2
C3
C4
C5
C6
A0
A1
A2
A4
A3
SCK
CS
SDI
32 cycles
delayed
SDO
t0
t3
t1
t2
C0
C1
C2
C3
C4
C5
C6
D15
D14
D13
D12
D7
D8
D9
D11
D10
t8
R/W
0
0
R
A0
A1
A2
A4
A3
Table 4-11: GSPI Time Delay
Parameter
Symbol
Conditions
Min
Typ
Max
Units
CS_n LOW before HOST_CLK rising edge
t0
50% levels
1.5
−−
ns
HOST_CLK period
t1
100
−−
ns
HOST_CLK duty cycle
t2
40
50
60
%
Input data setup time
t3
1.5
−−
ns
Output hold time (15pF load)
t6
1.5
−−
ns
CS_n HIGH after last HOST_CLK rising edge
t7
75% of
HOST_CLK
period
−−
ns
Input data hold time
t8
1.5
−−
ns



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