From 5d9171b5ccf154a4c7c5f8e152ea4fd75a5f33a5 Mon Sep 17 00:00:00 2001
From: Jan <climblinne@users.noreply.github.com>
Date: Thu, 3 Mar 2022 13:49:06 +0100
Subject: [PATCH] docs/library/machine.UART.rst: Add details for `invert`
 parameter.

---
 docs/library/machine.UART.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/library/machine.UART.rst b/docs/library/machine.UART.rst
index 8fb42cfe8749..e23952573698 100644
--- a/docs/library/machine.UART.rst
+++ b/docs/library/machine.UART.rst
@@ -63,6 +63,12 @@ Methods
      - *timeout* specifies the time to wait for the first character (in ms).
      - *timeout_char* specifies the time to wait between characters (in ms).
      - *invert* specifies which lines to invert.
+
+         - ``0`` will not invert lines (idle state of both lines is logic high).
+         - ``UART.INV_TX`` will invert TX line (idle state of TX line now logic low).
+         - ``UART.INV_RX`` will invert RX line (idle state of RX line now logic low).
+         - ``UART.INV_TX | UART.INV_RX`` will invert both lines (idle state at logic low).
+
      - *flow* specifies which hardware flow control signals to use. The value
        is a bitmask.