LMH0384 Datasheet, PDF (17/29 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

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LMH0384
SNLS308G – APRIL 2009 – REVISED JUNE 2015
Register Maps (continued)
ADDRESS R/W
NAME
02h
R/W Launch Amplitude
03h
R CLI
04h
R Device ID
Table 1. SPI Registers (continued)
BITS
FIELD
DEFAULT
7 Coarse Control
0
6:3 Fine Control
0000
2:0 Reserved
7:3 CLI
2:0 Reserved
7:0 Die Revision
000
000
00000010
DESCRIPTION
Coarse launch amplitude
optimization.
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).
Launch amplitude optimization
fine tuning.
0000: Nominal.
0001: -4% from nominal.
0010: -8% from nominal.
0011: -11% from nominal.
0100: -14% from nominal.
0101: -17% from nominal.
0110: -20% from nominal.
0111: -22% from nominal.
1000: Nominal.
1001: +4% from nominal.
1010: +9% from nominal.
1011: +14% from nominal.
1100: +20% from nominal.
1101: +26% from nominal.
1110: +33% from nominal.
1111: +40% from nominal.
Reserved as 000. Always write
000 to these bits.
Cable Length Indicator.
Provides an indication of the
length of cable attached to the
input. CLI increases as the
cable length increases.
Reserved.
Die revision.
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