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-rw-r--r--src/stm32/stm32l4.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/stm32/stm32l4.c b/src/stm32/stm32l4.c
index ae099d6b..3100a741 100644
--- a/src/stm32/stm32l4.c
+++ b/src/stm32/stm32l4.c
@@ -68,6 +68,8 @@ gpio_clock_enable(GPIO_TypeDef *regs)
RCC->AHB2ENR;
}
+// PLL (L412) input: 4 to 16Mhz, vco: 96 to 344Mhz, output: 12 to 80Mhz
+
#if !CONFIG_STM32_CLOCK_REF_INTERNAL
DECL_CONSTANT_STR("RESERVE_PINS_crystal", "PC14,PC15");
#endif