ST STM32L15 QC Series Datasheet page 45

STM32L151xC/C-A STM32L152xC/C-A
Table 8. STM32L151xC/C-A and STM32L152xC/C-A pin definitions (continued)
Pins
134 A7 90 56 B4
135 C5 91 57 A5
136 B5 92 58 B5
137 B4 93 59 C5
138 A4 94 60 A6
139 A3 95 61 D5
140 B3 96 62 B6
141 C3 97 -
142 A2 98 -
143 D3 99 63 A7
144 C4 100 64 A8
1. I = input, O = output, S = supply.
2. Function availability depends on the chosen device.
3. Applicable to STM32L152xD devices only. In STM32L151xD 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
PB4 I/O
PB5 I/O
PB6 I/O
PB7 I/O
BOOT0 I
PB8 I/O
PB9 I/O
- PE0 I/O
- PE1 I/O
V S
SS_3
V S
DD_3
Main
(2)
function
Alternate functions
(after reset)
TIM3_CH1/SPI1_MISO/
FT NJTRST
LCD_SEG8/NJTRST
TIM3_CH2/I2C1_SMBA/
FT PB5
I2S3_SD/LCD_SEG9
TIM4_CH1/I2C1_SCL/
FT PB6
TIM4_CH2/I2C1_SDA/
FT PB7
B BOOT0
TIM4_CH3/TIM10_CH1/
FT PB8
FT PB9 TIM11_CH1/I2C1_SDA/
TIM4_ETR/TIM10_CH1/
FT PE0
FT PE1 TIM11_CH1/LCD_SEG37
- V
SS_3
- V
DD_3
DS10262 Rev 8
Pin descriptions
Pin functions
SPI3_MISO/
SPI1_MOSI/
SPI3_MOSI/
USART1_TX/
USART1_RX
-
I2C1_SCL/
LCD_SEG16
TIM4_CH4/
LCD_COM3
LCD_SEG36
-
-
.
DD
Additional
functions
COMP2_INP
COMP2_INP
COMP2_INP
COMP2_INP/
PVD_IN
-
-
-
-
-
-
-
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