LMH0394_15 Datasheet, PDF (20/35 Pages) Texas Instruments – 3G HD/SD SDI Low Power Extended Reach Adaptive Cable Equalizer

LMH0394
SNLS312M – AUGUST 2010 – REVISED JULY 2015
Register Maps (continued)
Address
R/W
Name
Table 1. SPI Registers (continued)
Bits
Field
7:6
Output Swing
5:4
Offset Voltage
01h
R/W
Output Driver
3
De-Emphasis
2:1
De-Emphasis
Amplitude Level
0
Reserved
7
Launch Amplitude
Control
02h
R/W
Launch Amplitude
Control
6:0
Reserved
Default
10
10
0
01
0
0
1101000
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Description
Output driver swing
(V_SSP-P).
00: V_SSP-P = 400
mV_P-P.
01: V_SSP-P = 600
mV_P-P.
10: V_SSP-P = 700
mV_P-P.
11: V_SSP-P = 800
mV_P-P.
Output driver offset
voltage (common-
mode voltage).
00: V_OS = 0.8 V.
01: V_OS = 1.0 V.
10: V_OS = 1.2 V.
11: V_OS referenced
to positive supply.
Output driver de-
emphasis control.
0: De-emphasis
disabled.
1: De-emphasis
enabled.
Output driver de-
emphasis level.
00: 0 dB (no de-
emphasis).
01: -3 dB de-
emphasis.
10: -5 dB de-
emphasis.
11: -7 dB de-
emphasis.
Reserved (read
only).
Launch amplitude
optimization setting.
0: Normal
optimization with no
external attenuation
(800 mV_P-P launch
amplitude).
1: Optimized for 6
dB external
attenuation (400
mV_P-P launch
amplitude).
Reserved as
1101000. Always
write 1101000 to
these bits.
20
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