From e0c00c35ce195dc0ab3f729235b9490dc69592ec Mon Sep 17 00:00:00 2001
From: Dasky <32983009+daskygit@users.noreply.github.com>
Date: Thu, 26 Oct 2023 22:34:17 +0100
Subject: Clarify PIO define is optional in docs. (#22339)

---
 docs/serial_driver.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'docs/serial_driver.md')

diff --git a/docs/serial_driver.md b/docs/serial_driver.md
index c4b42f38dd..b7e803154b 100644
--- a/docs/serial_driver.md
+++ b/docs/serial_driver.md
@@ -235,7 +235,7 @@ Where 'n' matches the peripheral number of your selected USART on the MCU.
 
 The `PIO` subsystem is a Raspberry Pi RP2040 specific implementation, using the integrated PIO peripheral and is therefore only available on this MCU. Because of the flexible nature of the PIO peripherals, **any** GPIO pin can be used as a `TX` or `RX` pin. Half-duplex and Full-duplex operation is fully supported. The Half-duplex operation mode uses the built-in pull-ups and GPIO manipulation on the RP2040 to drive the line high by default. An external pull-up is therefore not necessary.
 
-Configure the hardware via your config.h:
+You may optionally switch the PIO peripheral used with the following define in config.h:
 ```c
 #define SERIAL_PIO_USE_PIO1 // Force the usage of PIO1 peripheral, by default the Serial implementation uses the PIO0 peripheral
 ```
-- 
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