LMH0384 Datasheet, PDF (16/29 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

LMH0384
SNLS308G – APRIL 2009 – REVISED JUNE 2015
7.6 Register Maps
ADDRESS R/W
NAME
00h
R/W General Control
01h
R/W Output Driver
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Table 1. SPI Registers
BITS
FIELD
7 Carrier Detect
6 Mute
5 Bypass
4:3 Sleep Mode
2 Extended 3G Reach Mode
1:0 Reserved
7:5 Output Swing
4:2 Offset Voltage
1:0 Reserved
DEFAULT
0
0
01
0
00
011
001
00
DESCRIPTION
0: No carrier detected.
1: Carrier detected.
Mute has precedence over
Bypass.
0: Normal operation.
1: Outputs muted.
0: Normal operation.
1: Equalizer bypassed.
Sleep mode control. Sleep has
precedence over Mute and
Bypass.
00: Disable sleep mode (force
equalizer to stay enabled).
01: Sleep mode active when no
input signal detected.
10: 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 cable length for 2.97
Gbps applications.
0: Normal operation.
1: Extended 3G reach mode.
Reserved as 00. Always write
00 to these bits.
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.
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.
16
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