Datasheet

LMH0395
SNLS323L –AUGUST 2010–REVISED APRIL 2013 www.ti.com
SPI Registers
Table 1. SPI Registers
Address R/W Name Bits Field Default Description
00h R/W General Control 7 Carrier Detect Read only.
0: No carrier detected.
1: Carrier detected.
6 Mute 0 Mute has precedence over
Bypass.
0: Normal operation.
1: Outputs muted.
5 Bypass 0 0: Normal operation.
1: Equalizer bypassed.
4:3 Sleep Mode 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.
2 Driver Select 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)
1 Master Reset 0 Reset registers and state
machine. (This bit is self-
clearing.)
0: Normal operation.
1: Reset registers and state
machine.
0 Acquisition Reset 0 Reset state machine. (This bit is
self-clearing.)
0: Normal operation.
1: Reset state machine.
01h R/W Output Driver 7:6 Output Swing 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
.
5:4 Offset Voltage 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.
3 De-Emphasis 0 Output driver de-emphasis
control.
0: De-emphasis disabled.
1: De-emphasis enabled.
2:1 De-Emphasis Amplitude 01 Output driver de-emphasis
Level level.
00: 0 dB (no de-emphasis).
01: 3 dB de-emphasis.
10: 5 dB de-emphasis.
11: 7 dB de-emphasis.
0 Reserved 0 Reserved (read only).
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