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LMH1229 and LMH1239 Programming Guide
SNAU305
February 2025
LMH1229
,
LMH1239
CONTENTS
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LMH1229 and LMH1239 Programming Guide
1
LMH1229 and LMH1239 Programming Guide
Trademarks
1
Access Methods
1.1
Register Programming Through SMBus
1.2
Register Programming Through SPI
1.3
Register Pages
2
Register Command Syntax
3
Device Configurations
3.1
Common Device Configuration
3.2
Common Register Commands
3.2.1
Channel Control
3.2.2
LMH12x9 Resets
3.2.2.1
LMH12x9 ENABLE Pin Override
3.2.2.2
LMH12x9 Share, CDR, and EQ/Drivers Page Resets
3.3
IN_MUX_SEL Override
3.4
Signal Detect Status for SDI_IN± and SDI_IN1±
3.4.1
Force Signal Detect Power Down
3.5
Lock Data Rate Indication
3.6
CDR Loop Bandwidth Override
3.7
Selective SMPTE Data Rate Lock
3.7.1
Digital Mute Reference Threshold
3.7.2
CTLE Index Check and Manual CTLE Override
3.8
Eye Opening Monitoring Operation
3.8.1
Fast EOM
3.8.1.1
Fast EOM Operation
3.8.2
Read Horizontal and Vertical Eye Opening
3.9
SDI_OUT±, OUT0± and OUT1± Default Mode of Operation
3.9.1
SDI_OUT±, OUT0± and OUT1± Independent Control
3.10
Invert OUT0±, OUT1±, and SDI_OUT± Data Polarity
3.11
OUT0±, OUT1±, and SDI_OUT± Driver Settings
3.11.1
OUT0± and OUT1± VOD Settings
3.11.2
OUT0± and OUT1± De-Emphasis Settings
3.11.3
SDI_OUT± VOD Settings
3.11.4
SDI_OUT± Pre-Emphasis
3.11.5
Output Driver Power Down
3.11.6
Cable Fault Detection (CFD)
3.12
LOCK_N Pin Output Settings
3.12.1
Interrupt Outputs Programmed by Interrupt Registers
3.13
PRBS Generator and Checker
3.14
CDR Lock Timing Control
3.14.1
Watchdog Timer
4
Register Maps
4.1
Share Registers
4.2
CDR Registers
4.3
EQ_Drivers Registers
IMPORTANT NOTICE
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