LMH0384 Datasheet, PDF (13/16 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

SPI Registers
TABLE 1. SPI Registers
Address R/W Name
Bits Field
00h R/W General Control 7 Carrier Detect
6 Mute
5 Bypass
4:3 Sleep Mode
2 Extended 3G
Reach Mode
01h R/W Output Driver
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.
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