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GS3281 Datasheet(PDF) 65 Page - Semtech Corporation

Part # GS3281
Description  3G-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

GS3281 Datasheet(HTML) 65 Page - Semtech Corporation

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GS3281
Final Data Sheet
Rev.7
PDS-061453
January 2019
65 of 97
Semtech
Proprietary & Confidential
www.semtech.com
0B
PLL_LOOP_
BANDWIDTH_
1
RSVD
15:13
R/W
0
Reserved - do not modify.
CFG_PLL_LBW_3G
12:8
R/W
8
Configure PLL loop bandwidth in terms
of ratio to nominal loop bandwidth 'x'
(see Table 2-3).
2.97Gb/s (3G) loop bandwidth setting:
0x00 = Reserved - do not use
0x01 = 0.0625x
0x02 = 0.125x
0x03 = 0.1875x
0x04 = 0.25x
0x05 = 0.3125x
0x06 = 0.375x
0x07 = 0.4375x
0x08 = 0.5x
0x09 = 0.5625x
0x0A = 0.625x
0x0B = 0.6875x
0x0C = 0.75x
0x0D = 0.8125x
0x0E = 0.875x
0x0F = 0.9375x
0x10 to 0x1B = Reserved - do not use
0x1C = 1.0x (nominal)
0x1D = 1.0625x
0x1E = 1.125x
0x1F = 1.1875x
RSVD
7:5
R/W
0
Reserved - do not modify.
CFG_PLL_LBW_HD
4:0
R/W
8
Configure 1.485Gb/s (HD) PLL loop
bandwidth in terms of ratio to nominal
loop bandwidth 'x' (see Table 2-3).
See CFG_PLL_LBW_3G parameter for
available settings.
0C
PLL_LOOP_
BANDWIDTH_
2
RSVD
15:13
R/W
0
Reserved - do not modify.
CFG_PLL_LBW_SD
12:8
R/W
1C
Configure 270Mb/s (SD) PLL loop
bandwidth in terms of ratio to nominal
loop bandwidth 'x' (see Table 2-3).
See CFG_PLL_LBW_3G parameter for
available settings.
RSVD
7:5
R/W
0
Reserved - do not modify.
CFG_PLL_LBW_MADI
4:0
R/W
8
Configure 125Mb/s (MADI) PLL loop
bandwidth in terms of ratio to nominal
loop bandwidth 'x' (see Table 2-3).
See CFG_PLL_LBW_3G parameter for
available settings.
0D
RSVD
RSVD
15:0
R/W
8
Reserved - do not modify.
0E to 0F
RSVD
RSVD
15:0
R/W
0
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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