STMicroelectronics STM32L151RE Manual page 45

STM32L151xE STM32L152xE
Table 8. STM32L151xE and STM32L152xE pin definitions (continued)
Pins
136 B5 92 58 C5
137 B4 93 59 B6
138 A4 94 60 A7
139 A3 95 61 D5
140 B3 96 62 C6
141 C3 97 - B7
142 A2 98 - A8
143 D3 99 63 C7
B8,
144 C4 100 64
A9
1. I = input, O = output, S = supply.
2. Function availability depends on the chosen device.
3. Applicable to STM32L152xE devices only. In STM32L151xE devices, this pin should be connected to V
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
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).
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.
Pin name
PB6 I/O FT
PB7 I/O FT
BOOT0 I B
PB8 I/O FT
PB9 I/O FT
PE0 I/O FT
PE1 I/O FT
V S -
SS_3
V S -
DD_3
DocID025433 Rev 8
Main
(2)
function
(after
Alternate functions
reset)
TIM4_CH1/I2C1_SCL/
PB6
USART1_TX
TIM4_CH2/I2C1_SDA/
PB7
USART1_RX
BOOT0
TIM4_CH3/TIM10_CH1/
PB8 I2C1_SCL/
LCD_SEG16
TIM4_CH4/
PB9 TIM11_CH1/I2C1_SDA/
LCD_COM3
TIM4_ETR/TIM10_CH1/
PE0
LCD_SEG36
PE1 TIM11_CH1/LCD_SEG37
V
SS_3
V
DD_3
Pin descriptions
Pin functions
Additional
functions
COMP2_INP
COMP2_INP/
PVD_IN
- -
-
-
-
-
- -
- -
.
DD
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