GS12281 datasheet(83/97 Pages) SEMTECH

83 / 97 page

GS12281

Final Data Sheet

Rev.9

PDS-061385

February 2019

83 of 97

Semtech

Proprietary & Confidential

www.semtech.com

(Continued)

PRBS_GEN_

CTRL

(Continued)

CTRL_PRBS_GEN_



CLK_DIVIDER

5:4

R/W

Selects clock divider ratio for when host

selects divided clock to output on PRBS

generator

(CTRL_PRBS_GEN_SIGNAL_SELECT = 0):

0 = divide by 2



1 = divide by 4



2 = divide by 8



3 = divide by 16

CTRL_PRBS_GEN_



INVERT

3R/W

Controls optional inversion of the

generated PRBS pattern:

0 = true sense



1 = inverted

CTRL_PRBS_GEN_



DATA_RATE

2:0

R/W

Select PRBS7 data rate when PRBS clock

source not recovered clock

(CTRL_PRBS_GEN_CLK_SRC

≠ 3)

0 = Reserved - do not use.



1 = MADI



2 = SD



3 = HD



4 = 3G



5 = 6G



6 = 12G



7 = Reserved - do not use.

If CTRL_PRBS_GEN_CLK_SRC = 3, then

CTRL_PRBS_GEN_DATA_RATE setting

has no effect and the CDR rate is used

(based on automatic rate detection or

manual rate selection).



Additionally, if the device is locked to an

input signal, only the same rate can be

selected for the PRBS generator.

RSVD

15:0

R/W

Reserved - do not modify.

EYE_MON_

INT_CFG_0

CFG_EYE_MON_



TIMEOUT_MS

15:0

R/W

CFG_EYE_MON_TIMEOUT[31:16]. Most

significant 16 bits of the measurement

time. This is the time spent measuring

bit errors at each point in the eye scan,

i.e. the time to measure one point in the

eye. Units are in microseconds. The Eye

Scanner scans each point twice and

there is some overhead, so the actual

measurement time is twice the number

entered.

Table 5-3: Control Register Descriptions (Continued)

Addressh

Name

Parameter Name

Bit

Slice

R/W

Reset

Valueh

Description

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