STM8L151C2 Datasheet, PDF (27/122 Pages) STMicroelectronics – Reset and supply management

STM8L151x2, STM8L151x3
Pinout and pin description
Table 3. Legend/abbreviation for table 4
Type
I= input, O = output, S = power supply
Level
Output
FT
HS = high sink/source (20 mA)
Five-volt tolerant
Port and control ^Input
configuration _Output
float = floating, wpu = weak pull-up
T = true open drain, OD = open drain, PP = push pull
Reset state
Bold X (pin state after reset release).
Unless otherwise specified, the pin state is the same during the reset phase (i.e.
“under reset”) and after internal reset release (i.e. at reset state).
Pin number
Table 4. Low-density STM8L151x2/3 pin description
Input
Output
Pin name
Default alternate
function
2 1 1 1 4 NRST/PA1⁽¹⁾
I/O
PA2/OSC_IN/
3 2 2 2 5 [USART_TX]⁽²⁾/
I/O
[SPI_MISO] ⁽²⁾
PA3/OSC_OUT/[USA
4 3 3 3 6 RT_RX]⁽²⁾/[SPI_MOSI I/O
]⁽²⁾
PA4/TIM2_BKIN/
5
44
-
-
[TIM2_ETR]⁽²⁾
ADC1_IN2/
I/O
COMP1_INP
PA5/TIM3_BKIN/
6
55
-
-
[TIM3_ETR]⁽²⁾/
ADC1_IN1/
I/O
COMP1_INP
PA6/ADC1_TRIG/
7 6 - - - ADC1_IN0/
I/O
COMP1_INP
8 - - - - PA7
I/O
PB0⁽³⁾/TIM2_CH1/
24 13 12 7 10 ADC1_IN18/
I/O
COMP1_INP
X
HS
X Reset PA1
HSE oscillator input /
X X X HS X X Port A2 [USART transmit] / [SPI
master in- slave out] /
HSE oscillator output /
X X X HS X X Port A3 [USART receive]/ [SPI
master out/slave in]/
Timer 2 - break input /
[Timer 2 - external
X X X HS X X Port A4 trigger] /ADC1 input 2/
Comparator1 positive
input
Timer 3 - break input /
[Timer 3 - external
X X X HS X X Port A5 trigger] /ADC1input 1/
Comparator1 positive
input
ADC1- trigger
X
X
X
HS X
X Port A6
/ADC1input 0/
Comparator1 positive
input
X X X HS X X Port A7
-
Timer 2 - channel 1 /
X
X
X
HS X
X Port B0
ADC1_IN18/
Comparator1 positive
input
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