STM32L151C6U6ADTR datasheet(45/130 Pages) STMICROELECTRONICS

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STM32L151x6/8/B-A STM32L152x6/8/B-A

Pin descriptions

PE1

I/O

PE1

LCD_SEG37/

TIM11_CH1

63 D4

VSS_3

S-

VSS_3

100 64 E4

VDD_3

S-

VDD_3

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

2. Function availability depends on the chosen device. For devices having reduced peripheral counts, it is always the lower

number of peripheral that is included. For example, if a device has only one SPI and two USARTs, they will be called SPI1

and USART1 & USART2, respectively. Refer to Table 2 on page 11.

3. Applicable to STM32L152xxxxA devices only. In STM32L151xxxxA devices, this pin should be connected to VDD.

4. 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

PC14/PC15 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 STM32L1xxxx reference manual (RM0038).

5. 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.

6. Unlike in the LQFP64 package, there is no PC3 in the TFBGA64 package. The VREF+ functionality is provided instead.

Table 9. STM32L151x6/8/B-A and STM32L152x6/8/B-A pin definitions (continued)

Pins

Pin name

Main

function(2)

(after reset)

Pins functions

Alternate functions

Additional

functions

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