If user's design is using 50 ohm PCB trace and cable impedances, user can set the LatticeXP2 IO output type to LVDS and this will produce 400mv peak signal swing at the receiver's 100 ohm termination with proper common mode output voltage. The ...
No. the signal 'ENABLE_OUTPUT' of the primitive SB_IO (IO primitive of the iCE40) cannot be used to create a bi-directional LVDS IO. One has to use two separate pairs of IOs for LVDS Tx and LVDS Rx.
The larger two devices (LCMXO1200 & LCMXO2280) in the MachXO family support True LVDS I/O. To set up "true LVDS" on the input side, connect a 100 ohm terminating resistor across the 'true' and 'compliment' input terminals. On the output side, no ...
For 7:1 LVDS design, it is usually used for unidirectional video data transfer. In Lattice's related reference designs -- RD1030/etc., data is driven to LVDS output pads through Output Buffer (OB) primitive To temporarily shut down the LVDS output ...
The following table lists 1% resistor values to use when the VCCIO is set to 2.5V and the IO output current setting is 8ma: Differential mV Rseries Rparallel 191 301 118 217 261 121 266 210 127 310 178 133 357 150 140 417 124 150 478 105 162 ...