How do I use set LVDS mode on Lattice ICE40 pins using ICESTORM tools

Question

I have a Lattice ICE40_8K breakout board and would like to know how to setup a pin pair as LVDS mode inputs.

If setting up as normal single pins is done thus:

SB_IO #(.PIN_TYPE(6'b0000_00)) _io (
        .PACKAGE_PIN(pin),
        .INPUT_CLK(clk),
        .D_IN_0(rd));

How do I modify that to be LVDS input pin, and how is the additional pin allocated.

Thanks

EDIT:

Would it be something like?:

  SB_IO #(.PIN_TYPE(6'b0000_00), .IO_STANDARD("SB_LVDS_INPUT")) _io (
        .PACKAGE_PIN(pin),
        .INPUT_CLK(clk),
        .D_IN_0(rd));

I understand the LVDS inputs are only in Bank 3, can anyone point me to what the pin list is for bank 3, so I can choose one ...

Thanks

Answer 1

Lattice TN1253 explains how to use LVDS inputs. There are Verilog code examples starting at page 15. The same Verilog code should also work with Project IceStorm.