From 1f98296cbd705d8fd6c7895fc663ee33c2a1e425 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Henrik=20Alse=CC=81r?= <henrik.alser@me.com> Date: Sun, 17 Jan 2021 21:50:30 +0100 Subject: [PATCH] Crystal --- README.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 7e31540..1410b2f 100644 --- a/README.md +++ b/README.md @@ -90,13 +90,13 @@ The microcontroller can boot in different modes, similar to how you can enter th ### 6) Crystal -The crystal will resonate at a specified frequency. Its waveform will be used as an input to the PLL (Phase Locked Loop) that will multiply the crystal’s frequency. This is the crystal that will be used:https://www.elfa.se/en/quartz-hc49us-mhz-auris-000000m-hc49ussmd-f3030d20/p/17452820 +The crystal will resonate at a specified frequency. Its waveform will be used as an input to the PLL (Phase Locked Loop) that will multiply the crystal’s frequency. This is the crystal that will be used:https://www.elfa.se/sv/kristall-ytmontering-12mhz-iqd-lfxtal003210/p/17452154 - Click on the Place component button. - Find the device/Crystal. - Place it close to `PH0` and `PH1`, pin 5 and 6 (`RCC_OS_CIN` and `RCC_OSC_OUT`). -- Connect the component with wires to the mentioned pins. Value 8.0MHz. -- Connect one 18p capacitor to each pin on the crystal and connect the other end of the capacitor to GND. +- Connect the component with wires to the mentioned pins. Value 12MHz. +- Connect one 22p capacitor to each pin on the crystal and connect the other end of the capacitors to GND. ### 7) Serial Wire Debug (SWD) connector -- GitLab