From ad26c5a7b62fe02bd3a24a4fbdd1d2d061d825ca Mon Sep 17 00:00:00 2001 From: Frederic Pillon Date: Wed, 26 Jul 2023 09:42:38 +0200 Subject: [PATCH] doc: update RTC clock source description Fixes #99 Signed-off-by: Frederic Pillon --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 2a1df66..314b3a5 100644 --- a/README.md +++ b/README.md @@ -51,7 +51,7 @@ enable an I2C peripheral in low power mode. See board documentation for low powe HardwareSerial used as Wakeup source will configure it to use HSI clock source even if another peripheral clock is configured. -RTC used as Wakeup source will configure it to use LSE clock source even if another RTC clock source is selected. +RTC used as Wakeup source requires to have LSE or LSI as clock source. If one of them is used nothing is changed else it will configure it to use LSI clock source. One exception exists when `SHUTDOWN_MODE` is requested and `PWR_CR1_LPMS` is defined, in that case LSE is used. The board will restart when exit shutdown mode.