From: whitequark <whitequark@whitequark.org>
Date: Fri, 29 May 2020 17:45:09 +0000 (+0000)
Subject: vendor.lattice_ice40: reword confusing comment. NFC.
X-Git-Tag: working2~15
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=afa43459030d1a85209cdb8e2987f70413c86238;p=nmigen.git

vendor.lattice_ice40: reword confusing comment. NFC.
---

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.