GS2985 Datasheet, PDF (38/45 Pages) Gennum Corporation – Uses standard 27MHz crystal

Table 4-12: Host Register Map (Continued)
Register Register
Bit
Name Address Position
TOP_1
0x02
15:9
8:7
Access
RW
RW
Function
Reserved.
LOS Threshold Adjust
6:5
RW
LOS Detection Method Select
4
RW
LOS Mute Enable
3
RW
Power Down
2
RW
Tri-State Enable for SPI Output
0X03 to 0X0B
1
RW
Crystal Buffer Disable
0
RW
Data Polarity Invert
Reserved.
Default Valid
Value Range
Comments
0x0
0x0 to
0x3
0x0 = least
sensitive
0x3 = most
sensitive
0x0
0x0 to 0x0 = legacy edge
0x2 detectionmethod
0x1 = new signal
strength
detection method
0x2 = dual
detection
method: both
must detect a
signal present for
LOS to be LOW
0x0
0 or 1
When enabled
the output will
automatically
mute if Loss of
Signal is HIGH
0x0
0 or 1
Chip powers
down when
asserted
0x0
0 or 1
When enabled
the SPI SDO will
be high Z when
CS is not selected
0x0
0 or 1
0 = Enabled
1 = Disabled
0x0
0 or 1 0 = Not Inverted
1 = Inverted
GS2985 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
36663 - 5
July 2012
38 of 45
Proprietary & Confidential