LMH0307 Datasheet, PDF (11/14 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Dual Cable Driver with Cable Detect

Address R/W Name
Bits Field
Default Description
05h R/W OUTPUT0CTRL 7 RSVD
0 Reserved as 0. Always write 0 to this bit.
6 FLOSOF
0 Force LOS to always OFF (signal never detected). This forces
the device into either the mute or “add offset” state. The
device will behave as if there is no signal regardless of the
input.
0: LOS operates normally, muting of adding offset as
specified by the MUTE bit.
1: Signal is never detected. Muting or adding offset is always
in place as specified by the MUTE bit.
5 FLOSON
0 Force LOS to always ON (signal always detected). This
prevents the device from muting or adding offset and makes
the LOS have no effect on device operation. (The LOS bit in
register 01h still reflects the state of LOS).
0: LOS operates normally, muting or adding offset as
specified in the MUTE bit.
1: LOS never causes muting or the addition of offset.
4 LOSEN
0 Configures LOS to be combined with the ENABLE
functionality.
0: Only the PD bits and ENABLE pin affect the power down
state of the output drivers.
1: If the ENABLE pin is set to ground, it powers down the
output drivers regardless of the state of LOS or the PD bits.
With the ENABLE pin set to V_CC, LOS=0 will power down the
output drivers, and LOS=1 will leave the power down state
dependent on the PD bits.
3 MUTE
0 Selects whether the device will MUTE when loss of signal is
detected or add an offset to prevent self oscillation. When an
input signal is detected (LOS=1), the device will operate
normally.
0: Loss of signal will force a small offset to prevent self
oscillation.
1: Loss of signal will force the channel to MUTE.
2:0 SDTFThresh0
010 Sets the Termination Fault threshold for SDO0, when SD is
set to SD rates (1). Combines with SDTFThresh0LSB in
register 03h (default for combined value is 0100).
06h R/W OUTPUT1
7:5 HDTFThresh1
100 Sets the Termination Fault threshold for SDO1, when SD is
set to HD rates (0). Combines with HDTFThresh1LSB in
register 07h (default for combined value is 1000).
4:0 AMP1
10000 SDO1 output amplitude in roughly 5 mV steps.
07h R/W OUTPUT1CTRL 7 HDTFThresh1LSB 0 Least Significant Bit for HDTFThresh1 detection threshold.
Combines with HDTFThresh1 bits in register 06h.
6 SDTFThresh1LSB 0 Least Significant Bit for SDTFThresh1 detection threshold.
Combines with SDTFThresh1 bits in register 07h.
5:3 RSVD
011 Reserved as 011. Always write 011 to these bits.
2:0 SDTFThresh1
010 Sets the Termination Fault threshold for SDO1, when SD is
set to SD rates (1). Combines with SDTFThresh1LSB in bit 6
(default for combined value is 0100).
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