STM32L151VD datasheet(42/140 Pages) STMICROELECTRONICS

42 / 140 page

Pin descriptions

STM32L151xD STM32L152xD

42/140

Doc ID 022027 Rev 6

I = input, O = output, S = supply.

FT = 5 V tolerant.

Function availability depends on the chosen device.

Applicable to STM32L152xD devices only. In STM32L151xD devices, this pin should be connected to VDD.

The PC14 and PC15 I/Os are only configured as OSC32_IN/OSC32_OUT when the LSE oscillator is ON (by setting the

LSEON bit in the RCC_CSR register). The LSE oscillator pins OSC32_IN/OSC32_OUT can be used as general-purpose

PH0/PH1 I/Os, respectively, when the LSE oscillator is off (after reset, the LSE oscillator is off). The LSE has priority over

the GPIO function. For more details, refer to Using the OSC32_IN/OSC32_OUT pins as GPIO PC14/PC15 port pins

section in the STM32L151xx, STM32L152xx and STM32L162xx reference manual (RM0038).

The PH0 and PH1 I/Os are only configured as OSC_IN/OSC_OUT when the HSE oscillator is ON (by setting the HSEON

bit in the RCC_CR register). The HSE oscillator pins OSC_IN/OSC_OUT can be used as general-purpose PH0/PH1 I/Os,

respectively, when the HSE oscillator is off ( after reset, the HSE oscillator is off ). The HSE has priority over the GPIO

function.

STM32L151VD Datasheet(PDF) 42 Page - STMicroelectronics