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GS12281 Datasheet(PDF) 72 Page - Semtech Corporation

Part # GS12281
Description  12G UHD-SDI Re-timing Cable Driver
PDF  97 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

GS12281 Datasheet(HTML) 72 Page - Semtech Corporation

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GS12281
Final Data Sheet
Rev.9
PDS-061385
February 2019
72 of 97
Semtech
Proprietary & Confidential
www.semtech.com
2E
OUTPUT_
PARAM_
CD_HD_2
RSVD
15:13
R/W
0
Reserved - do not modify.
CFG_OUTPUT0_CD_
HD_PREEMPH_WIDTH
12:8
R/W
8
Configure the HD/3G rate pre-emphasis
pulse width on cable driver output0
(SDO0).
Range: 0 to 15d
Adjust the pre-emphasis pulse width to
better match the channel loss response
shape.
RSVD
7
R/W
Reserved - do not modify.
CFG_OUTPUT0_CD_
HD_PREEMPH_
PWRDWN
6R/W
0
Power down the HD/3G rate
pre-emphasis on cable driver output0
(SDO0)
0 = Pre-emphasis driver powered up
(pre-emphasis enabled).
1 = Pre-emphasis driver powered down
(pre-emphasis disabled).
CFG_OUTPUT0_CD_
HD_PREEMPH_AMPL
5:0
R/W
5
Configure the HD/3G rate pre-emphasis
amplitude on cable driver output0
(SDO0).
Range: 0 to 15d.
Adjust the pre-emphasis pulse
amplitude to better match the channel
loss at Nyquist.
2F
OUTPUT_
PARAM_
CD_HD_3
RSVD
15:14
R/W
0
Reserved - do not modify.
CFG_OUTPUT0_CD_
HD_DRIVER_SWING
13:8
R/W
19
Configure the HD/3G rate amplitude on
cable driver output 0 (SDO0) in
~26mVpp steps.
Functional Range = 9d to 31d
Precision Range = 22d to 28d
Default value = 25d (~800mVpp)
Note: In auto slew mode (CTRL_
OUTPUT0_AUTO_SLEW=1), the slew
rate is determined by the rate at which
the CDR is locked. If the CDR is
unlocked, the slew will default to
6G/12G Slew. See Table 2-3 for Rise/Fall
Times, and Section 4.7.3 for more details
on output driver selection.
RSVD
7:0
R/W
80
Reserved - do not modify.
Table 5-3: Control Register Descriptions (Continued)
Addressh
Register
Name
Parameter Name
Bit
Slice
R/W
Reset
Valueh
Description



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