Datasheet

LMH0387
www.ti.com SNLS315G –APRIL 2010–REVISED APRIL 2013
Table 1. SPI Registers (continued)
Address R/W Name Bits Field Default Description
02h R/W Launch Amplitude 7 Coarse Control 0 Coarse launch amplitude
optimization for equalizer input.
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).
6:3 Fine Control 0000 Launch amplitude optimization
fine tuning for equalizer input.
0000: +20% from nominal.
0001: +16% from nominal.
0010: +12% from nominal.
0011: +9% from nominal.
0100: +6% from nominal.
0101: +3% from nominal.
0110: Nominal. (The default
setting must be changed to this
nominal setting for most
applications).
0111: -2% from nominal.
1001: +24% from nominal.
1010: +29% from nominal.
1011: +34% from nominal.
1100: +40% from nominal.
1101: +46% from nominal.
1110: +53% from nominal.
1111: +60% from nominal.
1000: Reserved.
2:0 Reserved 000 Reserved as 000. Always write
000 to these bits.
03h R CLI 7:3 CLI Cable Length Indicator.
Provides an indication of the
length of cable attached to the
equalizer input. CLI increases
as the cable length increases.
2:0 Reserved 000 Reserved.
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