From 8e149e588f8324cf48fca70572f032ecadd6b98c Mon Sep 17 00:00:00 2001
From: dobosi <dobosi@theis-feinwerktechnik.de>
Date: Wed, 11 Jun 2025 11:28:28 +0200
Subject: [PATCH] Added readme with the board modification instructions

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 README.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 README.md

diff --git a/README.md b/README.md
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+# Nucleo-F303RE
+DigitalAudio485 prototype with STM32 Nucleo-F303RE board
+
+## Modification of Nucleo-F303RE
+
+### HSE oscillator from X3 crystal
+P.25 OSC clock supply
+
+* [ ] SB54 and SB55 OFF
+* [ ] R35 and R37 soldered
+* [ ] X3 crystal soldered
+* [ ] C33 and C34 soldered with 20 pF capacitors
+* [ ] SB16 and SB50 OFF (MCO)
+
+### Disable OSC 32kHz
+P.26 LSE not used
+
+* [ ] SB48 and SB49 ON
+* [ ] R34 and R36 removed
+
+### USB-Serial to UART5
+P.26 USART communication
+
+* [ ] SB62 and SB63 must be ON
+* [ ] SB13 and SB14 must be OFF
+
+