GS3590 datasheet(22/118 Pages) SEMTECH

22 / 118 page

GS3590

Final Data Sheet Rev.4



PDS-061414 September 2017

22 of 118

Semtech

Proprietary & Confidential

www.semtech.com

To help detail how the device determines the state of Squelch, we define the following

variables:

 CLI = STAT_CABLE_LEN_INDICATION

 THR = CFG_CLI_SQUELCH_THRESHOLD

 HYS = CFG_CLI_SQUELCH_HYSTERESIS

 SQL = STAT_CLI_SQUELCH

The following rules define the state of SQL.



Note: If the cable equalizer is in bypass (STAT_CEQ_BYPASS = 1), the device will set

SQL to 0.

 If CLI > (THR + HYS), the device will set SQL to 1, otherwise:

 If CLI < (THR - HYS), the device will set SQL to 0, otherwise:

 If CLI ≥ (THR - HYS) and CLI ≤ (THR + HYS), SQL remains unchanged.

 If SQL = 1, the device will not indicate lock and the trace driver state will be

defined by output state control parameters settings, see Section 4.8.7 for more

details.

Table 4-1: Cable Equalizer Status and Configuration Parameters

Parameter Name

Parameter Description

15, CARR_ DET_CFG

CFG_SEC_CD_INCL_CLI_SQUELCH

Enables or disables squelch control.

16, SQUELCH_ PARAMETERS

CFG_CLI_SQUELCH_THRESHOLD

Used to tune the squelch threshold based on the

tolerance requirements of the application.

CFG_CLI_SQUELCH_HYSTERESIS

Used to tune the squelch hysteresis based on the

tolerance requirements of the application.

20, CD_FILTER_ DELAYS_0

CFG_CD_FILTER_SAMPLE_WIN

Primary carrier detect sampling window size.

21, CD_FILTER_ DELAYS_1

CFG_CD_FILTER_DEASSERT_CNT

Primary carrier detect de-assertion count.

22, CD_FILTER_ DELAYS_2

CFG_CD_FILTER_ASSERT_CNT

Primary carrier detect assertion count.

84, STICKY_ COUNTS_0

STAT_CNT_PRI_CD_CHANGES

A counter showing the number of times the primary

Carrier Detect signal changed.

STAT_CNT_SEC_CD_CHANGES

A counter showing the number of times the secondary

Carrier Detect signal changed.

86, CURRENT_ STATUS_0

STAT_CLI_SQUELCH

Cable equalizer Squelch status.

87, CURRENT_ STATUS_1

STAT_PRI_CD

Primary filtered carrier detect of the analogue carrier

detect signal.

STAT_SEC_CD

Secondary filtered carrier detect of the analogue carrier

detect signal.

88, EQ_GAIN_IND

STAT_CABLE_LEN_INDICATION

SDIO cable length indication when in cable equalizer

mode.

GS3590 Datasheet(PDF) 22 Page - Semtech Corporation

GS3590 Datasheet(HTML) 22 Page - Semtech Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL