GS3281 datasheet(36/97 Pages) SEMTECH

36 / 97 page

GS3281

Final Data Sheet

Rev.7

PDS-061453

January 2019

36 of 97

Semtech

Proprietary & Confidential

www.semtech.com

 Manually set the appropriate slew rate in CTRL_OUTPUT<n>_MANUAL_SLEW

for the rate to be selected in CTRL_PRBS_GEN_DATA_RATE

 0 for SD and MADI

 1 for HD and 3G

Note: The <n> in the control parameter names refers to the output number. Output 0 is

the cable driver output SDO0/SDO0 and output 1 is the cable driver output SDO1/SDO1.

3. Set the values within the following parameters which meet the needs of the

application:

 CTRL_PRBS_GEN_SIGNAL_SELECT

 CTRL_PRBS_GEN_CLK_SRC

 CTRL_PRBS_GEN_DATA_RATE

Note: If CTRL_PRBS_GEN_CLK_SRC was set to CDR recovered clock a valid signal that

the CDR has locked to must be present for proper operation, and the PRBS generator will

match this data rate regardless of what rate CTRL_PRBS_GEN_DATA_RATE is set to.

 CTRL_PRBS_GEN_CLK_DIVIDER

 CTRL_PRBS_GEN_INVERT

4. Start the generator by setting CTRL_PRBS_GEN_ENABLE = 1.

To stop the generator at any time, set CTRL_PRBS_GEN_ENABLE = 0. If the use of the

PRBS generator is complete, revert any settings made in steps 1 and 2 to return to

normal operation.

Table 4-7: PRBS Generator Parameter Descriptions

and Name

Parameter Name

Description

3, CONTROL_ SLEEP

CTRL_AUTO_SLEEP

Set the device to auto or manual sleep.

CTRL_MANUAL_SLEEP

Manually set the sleep setting of the device when auto

sleep mode is turned off.

48, OUTPUT_ SIG_SELECT

CTRL_OUTPUT1_SIGNAL_SEL

Selects between data or PRBS generator as the driver

source for SDO1/SDO1.

CTRL_OUTPUT0_SIGNAL_SEL

Selects between data or PRBS generator as the driver

source for SDO0/SDO0.

49, CONTROL_ OUTPUT_

MUTE

CTRL_OUTPUT1_AUTO_MUTE

Select automatic or manual mute control for

SDO1/SDO1.

CTRL_OUTPUT1_MANUAL_MUTE

Manually set the mute control for SDO1/SDO1 when

auto mute mode is turned off.

CTRL_OUTPUT0_AUTO_MUTE

Select automatic or manual mute control for

SDO0/SDO0.

CTRL_OUTPUT0_MANUAL_MUTE

Manually set the mute control of the SDO0/SDO0 when

auto mute mode is turned off.

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