GS2985 Datasheet, PDF (36/45 Pages) Gennum Corporation – Uses standard 27MHz crystal

4.15.14 Host Register Map
Table 4-12: Host Register Map
Register Register
Bit
Name Address Position
EQ_1
0x00
15:10
9
8
7
6
5
4
3
2
1
0
Access
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Function
Default Valid
Value Range
Comments
Reserved.
Input Attenuation Enable
(ATTEN_EN)
Equalizer Offset Correction Enable
Equalizer Gain Setting for DDI3
Equalizer Gain Setting for DDI2
Equalizer Gain Setting for DDI1
Equalizer Gain Setting for DDI0
Equalizer Enable for DDI3
Equalizer Enable for DDI2
Equalizer Enable for DDI1
Equalizer Enable for DDI0
0x0
0x1
0x0
0x0
0x00
0x00
0x00
0x00
0x00
0x00
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
Enable for input
signals above
1Vpp differential
Recommend
always on
See
supplementary
table below
See
supplementary
table below
See
supplementary
table below
See
supplementary
table below
See
supplementary
table below
See
supplementary
table below
See
supplementary
table below
See
supplementary
table below
Equalizer Decode Logic
EQ_EN
0
0
1
1
EQ_GAIN
0
1
0
1
EQ Setting
LOW
LOW
MED
HIGH
Recommended Trace Lengths
0 to 10 inches of FR4
0 to 10 inches of FR4
10 to 20 inches of FR4
20 or more inches of FR4
GS2985 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
36663 - 5
July 2012
36 of 45
Proprietary & Confidential