From 5ae15931c6bbf244b67063c3f600b21c973ee674 Mon Sep 17 00:00:00 2001
From: tzarc <nick@tzarc.org>
Date: Mon, 25 Sep 2023 03:11:29 +0000
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---
 feature_ps2_mouse.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/feature_ps2_mouse.md b/feature_ps2_mouse.md
index e714d9b8676..766fd6fe78f 100644
--- a/feature_ps2_mouse.md
+++ b/feature_ps2_mouse.md
@@ -155,6 +155,29 @@ In your keyboard config.h:
 #endif
 ```
 
+### RP2040 PIO Version :id=rp2040-pio-version
+
+The `PIO` subsystem is a Raspberry Pi RP2040 specific implementation, using the integrated PIO peripheral and is therefore only available on this MCU.
+
+There are strict requirements for pin ordering but any pair of GPIO pins can be used. The GPIO used for clock must be directly after data, see the included info.json snippet for an example of correct order.
+
+You may optionally switch the PIO peripheral used with the following define in config.h:
+```c
+#define PS2_PIO_USE_PIO1 // Force the usage of PIO1 peripheral, by default the PS2 implementation uses the PIO0 peripheral
+```
+
+Example info.json content:
+
+```json
+    "ps2": {
+        "clock_pin": "GP1",
+        "data_pin": "GP0",
+        "driver": "vendor",
+        "enabled": true,
+        "mouse_enabled": true
+    }
+```
+
 ## Additional Settings :id=additional-settings
 
 ### PS/2 Mouse Features :id=ps2-mouse-features