LMH0303 Datasheet, PDF (12/27 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Cable Driver with Cable Detect

LMH0303
SNLS285H – APRIL 2008 – REVISED MAY 2016
www.ti.com
7.5 Register Maps
Table 1 lists the SMBus registers of the LMH0303 device.
ADDRESS
0x00
R/W
R/W ID
NAME
0x01
R STATUS
0x02
R/W MASK
Table 1. SMBus Registers
BITS
FIELD
7:1 DEVID
0 RSVD
7:3 RSVD
2 TFN
1 TFP
0 LOS
7 SD
6 RSVD
5 PD
4:3 RSVD
2 MTFN
1 MTFP
0 MLOS
DEFAULT
0010111
0
00000
0
0
0
0
0
0
00
0
0
0
DESCRIPTION
Device ID. Writing this register will force the
RSTO pin high. Further access to the device
must use this 7-bit address.
Reserved as 0. Always write 0 to this bit.
Reserved.
Termination Fault for SDI.
0: No Termination Fault Detected.
1: Termination Fault Detected.
Termination Fault for SDI.
0: No Termination Fault Detected.
1: Termination Fault Detected.
Loss Of Signal (LOS) detect at input.
0: No Signal Detected.
1: Signal Detected.
SD Rate select bit. If the SD/HD pin is set to
V_CC, it overrides this bit. With the SD/HD pin
set to ground, this bit selects the output edge
rate as follows:
0: HD edge rate.
1: SD edge rate.
Reserved as 0. Always write 0 to this bit.
Power Down for SDO output stage. If the
ENABLE pin is set to ground, it overrides this
bit. With the ENABLE pin set to V_CC, PD
functions as follows:
0: SDO active.
1: SDO powered down.
Reserved as 00. Always write 00 to these bits.
Mask TFN from affecting FAULT pin.
0: TFN=1 will cause FAULT to be 0.
1: TFN=1 will not affect FAULT; the condition
is masked off.
Mask TFP from affecting FAULT pin.
0: TFP=1 will cause FAULT to be 0.
1: TFP=1 will not affect FAULT; the condition
is masked off.
Mask LOS from affecting FAULT pin.
0: LOS=0 will cause FAULT to be 0.
1: LOS=0 will not affect FAULT; the condition
is masked off.
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