GS2986 datasheet(34/41 Pages) SEMTECH

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GS2986 Multi-Rate SDI Reclocker with Equalization &

De-emphasis

Data Sheet

52134 - 3

July 2012

34 of 41

DRIVER_1

0x01

15:10

Unused

0x0

0 or 1

−

Amplitude Control for DDO1

0x1

0 or 1

0 = 800mV swing

1 = 400mV swing

Amplitude Control for DDO0

0x1

0 or 1

0 = 800mV swing

1 = 400mV swing

7:5

De-Emphasis Boost Amplitude

Control for DDO1

0x2

0x0 to

0x7

0x0 = Lowest

Setting

0x7 = Highest

Setting

4:2

De-Emphasis Boost Amplitude

Control for DDO0

0x2

0x0 to

0x7

0x0 = Lowest

Setting

0x7 = Highest

Setting

De-Emphasis Enable for DDO1

0x0

0 or 1

1 = Enabled

0 = Disabled

De-Emphasis Enable for DDO0

0x0

0 or 1

1 = Enabled

0 = Disabled

TOP_1

0x02

15:9

Reserved.

8:7

LOS Threshold Adjust

0x0

0x0 to

0x3

0x0 = least

sensitive

0x3 = most

sensitive

6:5

LOS Detection Method Select

0x0

0x0 to

0x2

0x0 = legacy edge

detectionmethod

0x1 = new signal

strength

detectionmethod

0x2 = dual

detection

method: both

must say signal

present for LOS to

be LOW

4RW

LOS Mute Enable

0x0

0 or 1

When enabled

the output will

automatically

mute if Loss of

Signal is HIGH

Power Down

0x0

0 or 1

Chip powers

down when

asserted

2RW

Tri-State Enable for SPI Output

0x0

0 or 1

When enabled

the SPI SDO will

be high Z when

CS is not selected

Table 4-11: Host Register Map (Continued)

Name

Address

Bit

Position

Access

Function

Default

Value

Valid

Range

Comments

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