LMH0395 Datasheet, PDF (16/21 Pages) Texas Instruments – 3G HD/SD SDI Dual Output Low Power Extended Reach Adaptive Cable Equalizer

SPI Registers
TABLE 1. SPI Registers
Address R/W Name
00h R/W General Control
01h R/W Output Driver
02h R/W Launch
Amplitude
Control
Bits Field
7 Carrier Detect
6 Mute
5 Bypass
4:3 Sleep Mode
2 Driver Select
1 Master Reset
0 Acquisition Reset
7:6 Output Swing
5:4 Offset Voltage
3 De-Emphasis
2:1 De-Emphasis
Amplitude Level
0 Reserved
7 Launch Amplitude
Control
6:0 Reserved
Default Description
Read only.
0: No carrier detected.
1: Carrier detected.
0 Mute has precedence over Bypass.
0: Normal operation.
1: Outputs muted.
0 0: Normal operation.
1: Equalizer bypassed.
01 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.
0 Select output driver for control/status.
0: Register 01h bits [7:1] control output driver 0 (SDO0,
SDO0)
1: Register 01h bits [7:1] control output driver 1 (SDO1,
SDO1)
0 Reset registers and state machine. (This bit is self-clearing.)
0: Normal operation.
1: Reset registers and state machine.
0 Reset state machine. (This bit is self-clearing.)
0: Normal operation.
1: Reset state machine.
10
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.
10 Output driver offset voltage (common mode voltage).
00: V_OS = 0.8V.
01: V_OS = 1.0V.
10: V_OS = 1.2V.
11: V_OS referenced to positive supply.
0 Output driver de-emphasis control.
0: De-emphasis disabled.
1: De-emphasis enabled.
01 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.
0 Reserved (read only).
0 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).
1101000 Reserved as 1101000. Always write 1101000 to these bits.
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