LMH0387SL Datasheet, PDF (16/23 Pages) Texas Instruments – LMH0387 3 Gbps HD/SD SDI Configurable I/O Adaptive Cable Equalizer / Cable Driver

LMH0387
SNLS315G – APRIL 2010 – REVISED APRIL 2013
Address
00h
R/W Name
R/W General Control
01h
R/W Output Driver
SPI Registers
Table 1. SPI Registers
Bits Field
7 Carrier Detect
6 Mute
5 Reserved
4:3 Sleep Mode
2 Extended 3G Reach Mode
1:0 Reserved
7:5 Output Swing
4:2 Offset Voltage
1:0 Reserved
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Default
0
0
01
0
00
011
001
00
Description
Read only.
0: No carrier detected on
BNC_IO pin.
1: Carrier detected on BNC_IO
pin.
0: Normal operation.
1: Equalizer outputs muted.
Reserved as 0. Always write 0
to this bit.
Equalizer sleep mode control.
Sleep has precedence over
Mute.
00: Never sleep. Disable sleep
mode (force equalizer to stay
enabled).
01: Auto sleep. Sleep mode
active when no input signal
detected.
10: Force sleep. Force
equalizer into sleep mode
(powered down) regardless of
whether there is an input signal
or not.
11: Reserved.
Extended 3G reach mode to
extend the equalizable cable
length for 2.97 Gbps
applications.
0: Normal operation.
1: Extended 3G reach mode.
Reserved as 00. Always write
00 to these bits.
Equalizer output driver swing
(V_SSP-P).
000: V_SSP-P = 400 mV_P-P.
001: V_SSP-P = 500 mV_P-P.
010: V_SSP-P = 600 mV_P-P.
011: V_SSP-P = 700 mV_P-P.
100: V_SSP-P = 800 mV_P-P.
101, 110, 111: Reserved.
Equalizer output driver offset
voltage (common mode
voltage).
000: V_OS = 1.05V.
001: V_OS = 1.25V.
010: V_OS = 1.45V.
011: V_OS = 1.65V.
100: V_OS = 1.85V.
101: V_OS referenced to positive
supply.
110, 111: Reserved.
Reserved as 00. Always write
00 to these bits.
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