From aa08721f37000e494bf2317f17ef4122d18cf3df Mon Sep 17 00:00:00 2001 From: whitequark Date: Fri, 29 May 2020 17:45:09 +0000 Subject: [PATCH] vendor.lattice_ice40: reword confusing comment. NFC. --- nmigen/vendor/lattice_ice40.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/nmigen/vendor/lattice_ice40.py b/nmigen/vendor/lattice_ice40.py index 4617d03..fcfa1c0 100644 --- a/nmigen/vendor/lattice_ice40.py +++ b/nmigen/vendor/lattice_ice40.py @@ -620,8 +620,8 @@ class LatticeICE40Platform(TemplatedPlatform): self._get_io_buffer(m, pin, n_port, attrs, o_invert=not invert, invert_lut=True) return m - # Tristate and bidirectional buffers are not supported on iCE40 because it requires external - # termination, which is incompatible for input and output differential I/Os. + # Tristate bidirectional buffers are not supported on iCE40 because it requires external + # termination, which is different for differential pins configured as inputs and outputs. # CDC primitives are not currently specialized for iCE40. It is not known if iCECube2 supports # the necessary attributes; nextpnr-ice40 does not. -- 2.30.2