Can you get away with only using the RX LVDS interface and leave the TX bus unconnected.
Yes you can use it RX only and connect TX bus to ground to make sure it is in known state.
The TX inputs are differential... should I connect both the P and N inputs to ground? Also, the datasheet states that the inputs should be between 875mV and 1575mV.
one approach is to connect all non used interface lines to ground as at startup chip comes in cmos mode.
Then during initialization before setting the interface to LVDS select single port mode to make sure unused port is disabled.
Page 10 of the register map reference manual states that dual port mode is required when in LVDS mode. Is this not correct?
SPI Register 0x012—Parallel Port Configuration 3:
D4—LVDS Mode: When clear, the data port uses single-ended CMOS. Set this bit to use LVDS. Full duplex (0x012[D3] clear), DDR (0x012[D5] clear), and dual port mode (0x012[D2] clear) are required.
Yes you are correct in LVDS both ports are enabled
Connect the P and N as per LVDS standard to make it logic low.
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