GS6151 datasheet(67/77 Pages) SEMTECH

67 / 77 page

GS6151

Final Data Sheet

Rev.4

PDS-060389

August 2015

67 of 77

Semtech

Proprietary & Confidential

www.semtech.com

3Dh

PRBS_CTRL_3

PRBS_MON_MEASUREMENT_

TIME

15:0

A8Bh

Selects measurement interval in multiples of

pre-divider cycles. The measurement time

for a single phase is:

PRBS_MON_MEASURE_PREDIVIDER *

(PRBS_MON_MEASUREMENT_TIME + 1) *

(1/108MHz).

The default value results in a 100μs

measurement time or roughly 12.8ms for a

full scan of 128 phases. The maximum

measurement time is ~1.25 seconds.

3Eh

PRBS_CTRL_4

PRBS_MON_PRBS_ERROR_

THRESHOLD

15:0

PRBS error count threshold for good/bad

BER for automatic eye scan. A measurement

is considered to pass if

PRBS_ERROR_COUNT is less than or equal to

this threshold. It fails if the count is greater.

The default threshold corresponds to a bit

error rate of 6.67E-6 at 6G using the default

measurement interval of 100μs.

3Fh

PRBS_CTRL_5

RSVD

15:11

Reserved. Do not change.

PRBS_MON_MANUAL_PHASE

10:4

Phase setting for manual timed or

continuous scans

RSVD

3:0

Reserved. Do not change.

40h

PRBS_CTRL_6

PRBS_MON_CLEAR

1:1

00b: No effect

01b: Manually clear error indication

Only used when

PRBS_MON_FORCE_CLEAR = 1

PRBS_MON_FORCE_CLEAR

0:0

00b: Manual error clearing is disabled

01b: Enables error clearing through

PRBS_MON_CLEAR

Allows host interface to directly control the

PRBS error counting algorithm, bypassing

the PRBS_MON_CTRL state machine.

Table 5-1: Register Descriptions - Standard Address Space (Continued)

Address Register Name

Parameter Name

Bit

Slice

R/W

Reset

Value

Description

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