LMH0303 Datasheet, PDF (11/14 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Cable Driver with Cable Detect

Address R/W Name
05h R/W OUTPUTCTRL
Bits Field
7 RSVD
6 FLOSOF
5 FLOSON
4 LOSEN
3 MUTE
06h R/W RSVD
07h R/W RSVD
08h R/W TEST
2:0 SDTFThresh
7:0 RSVD
7:0 RSVD
7:5 CMPCMD
4:0 RSVD
Default Description
0 Reserved as 0. Always write 0 to this bit.
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 or 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.
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.
0 Configures LOS to be combined with the ENABLE
functionality.
0: Only the PD bit 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 bit.
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 bit.
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.
010 Sets the Termination Fault threshold for SDO, when SD is
set to SD rates (1). Combines with SDTFThreshLSB in
register 03h (default for combined value is 0100).
00000000 Reserved as 00000000. Always write 00000000 to these
bits.
00000000 Reserved as 00000000. Always write 00000000 to these
bits.
000 Compare command. Determines whether the peak value or
the current value of the Termination Fault counters is read
in registers 0Ah and 0Bh.
000: Resets compare value to 00; registers 0Ah and 0Bh
show current counter values. Sets detection to look for MAX
peak values.
001: Capture counter 0. Register 0Ah shows peak value.
010: Capture counter 1. Register 0Bh shows peak value.
011, 100: Reserved.
101: Resets compare value to 1Fh. Sets detection to look
for MIN peak values.
110, 111: Reserved.
00000 Reserved as 00000. Always write 00000 to these bits.
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