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-rw-r--r--src/stm32/stm32g4.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/stm32/stm32g4.c b/src/stm32/stm32g4.c
index 02c9656f..3301071e 100644
--- a/src/stm32/stm32g4.c
+++ b/src/stm32/stm32g4.c
@@ -76,6 +76,8 @@ gpio_clock_enable(GPIO_TypeDef *regs)
RCC->AHB2ENR;
}
+// PLL (g4) input: 2.66 to 16Mhz, vco: 96 to 344Mhz, output: 2.06 to 170Mhz
+
#if !CONFIG_STM32_CLOCK_REF_INTERNAL
DECL_CONSTANT_STR("RESERVE_PINS_crystal", "PF0,PF1");
#endif