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STM8S903K3 Datasheet(PDF) 23 Page - STMicroelectronics

Part # STM8S903K3
Description  16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes EEPROM,10-bit ADC, 2 timers, UART, SPI, IC
PDF  121 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM8S903K3 Datasheet(HTML) 23 Page - STMicroelectronics

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STM8S903K3 STM8S903F3
Pinouts and pin descriptions
30
5.3
TSSOP20, SO20 and UFQFPN20 pin descriptions
Table 5. TSSOP20/SO20/UFQFPN20 pin descriptions
Input
Output
4
1 NRST
I/O
-
X
-
-
-
-
-
Reset
-
5
2 PA1/ OSCIN(2)
I/O
X
X
X
-
O1
X
X
Port
A1
Resonator/
crystal in
-
6
3 PA2/ OSCOUT
I/O
X
X
X
-
O1
X
X
Port
A2
Resonator/
crystal out
-
7
4 VSS
S
-
-
-
-
-
-
-
Digital ground
-
8
5 VCAP
S
-
-
-
-
-
-
-
1.8 V regulator capacitor
-
9
6 VDD
S
-
-
-
-
-
-
-
Digital power supply
-
10 7
PA3/
TIM5_CH3
[SPI_NSS]
[UART1_TX]
I/O
X
X
X
HS
O3
X
X
Port
A3
Timer 52
channel 3
SPI master/
slave select
[AFR1]/ UART1
data transmit
[AFR1:0]
11
8
PB5/ I2C_SDA
[TIM1_BKIN]
I/O
X
-
X
-
O1 T(3)
Port
B5
I2C data
Timer 1 - break
input [AFR4]
12 9
PB4/ I2C_SCL
[ADC_ETR]
I/O
X
-
X
-
O1 T(3)
Port
B4
I2C clock
ADC external
trigger [AFR4]
13 10
PC3/
TIM1_CH3/TLI/
[TIM1_CH1N]
I/O
X
X
X
HS
O3
X
X
Port
C3
Timer 1 -
channel 3
Top level
interrupt [AFR3]
Timer 1 inverted
channel 1
[AFR7]
14 11
PC4/
TIM1_CH4/
CLK_CCO/AIN
2/[TIM1_CH2]
I/O
X
X
X
HS
O3
X
X
Port
C4
Timer 1 -
channel 4
/configurable
clock output
Analog input 2
[AFR2]Timer 1
inverted
channel 2
[AFR7]
15 12
PC5/SPI_SCK
[TIM5_CH1]
I/O
X
X
X
HS
O3
X
X
Port
C5
SPI clock
Timer 5
channel 1
[AFR0]
16 13
PC6/
SPI_MOSI
[TIM1_CH1]
I/O
X
X
X
HS
O3
X
X
Port
C6
PI master
out/slave in
Timer 1 channel
1 [AFR0]
17 14
PC7/
SPI_MISO
[TIM1_CH2]
I/O
X
X
X
HS
O3
X
X
Port
C7
SPI master in/
slave out
Timer 1 channel
2[AFR0]



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