STM8S903F3 STMicroelectronics, STM8S903F3 Datasheet - Page 23

• Manufacturer Part Number: STM8S903F3
• Description: 16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes EEPROM
• Manufacturer: STMicroelectronics

Specifications of STM8S903F3

• Program Memory: 8 Kbytes Flash; data retention 20 years at 55 °C after 10 kcycles
• Data Memory: 640 bytes true data EEPROM; endurance 300 kcycles
• Ram: 1 Kbytes
• Advanced Control Timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization

STM8S903K3 STM8S903F3
5.3
TSSOP
SO20
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
(1)
"Absolute maximum ratings").
(2)
recommended to use PA1 only in input mode if Halt/Active-halt is used in the application.
(3)
(4)
The PD1 pin is in input pull-up during the reset phase and after internal reset release.
I/O pins used simultaneously for high current source/sink must be uniformly spaced around the package. In addition, the total driven current must respect the absolute maximum ratings ( see section
When the MCU is in Halt/Active-halt mode, PA1 is automatically configured in input weak pull-up and cannot be used for waking up the device. In this mode, the output state of PA1 is not driven. It is
In the open-drain output column, ‘T’ defines a true open-drain I/O (P-buffer, weak pull-up, and protection diode to V DD are not implemented)
UFQFPN
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin name
NRST
PA1/ OSCIN
PA2/ OSCOUT
V SS
VCAP
V DD
PA3/ TIM5_CH3 [SPI_NSS]
[UART1_TX]
PB5/ I2C_SDA [TIM1_BKIN]
PB4/ I2C_SCL [ADC_ETR]
PC3/
TIM1_CH3/TLI/[TIM1_CH1N ]
PC4/ TIM1_CH4/
CLK_CCO/AIN2/[TIM1_CH2N]
PC5/SPI_SCK [TIM5_CH1]
PC6/ SPI_MOSI [TIM1_CH1]
PC7/ SPI_MISO [TIM1_CH2]
PD1/ SWIM
PD2/AIN3/ [TIM5_CH3]
PD3/ AIN4/ TIM5_CH2/
ADC_ETR
PD4/ TIM5_CH1/ BEEP
[UART1_CK]
PD5/ AIN5/ UART1_TX
PD6/ AIN6/ UART1_RX
Pin description TSSOP20_SO20_UFQFPN20
(4)
(2)
Table 5: TSSOP20/SO20/UFQFPN20 pin description
Type
I/O
I/O
I/O
S
S
S
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Input
floating
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
wpu
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Ext.
interrupt
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
DocID15590 Rev 6
Output
High
sink
HS
HS
HS
HS
HS
HS
HS
HS
HS
HS
HS
HS
(1)
Speed
O1
O1
O3
O1
O1
O3
O3
O3
O3
O3
O4
O3
O3
O3
O3
O3
OD
X
X
X
T
T
X
X
X
X
X
X
X
X
X
X
X
(3)
(3)
PP
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Main
function
(after
reset)
Reset
Port
A1
Port
A2
Digital ground
1.8 V regulator capacitor
Digital power supply
Port
A3
Port
B5
Port
B4
Port
C3
Port
C4
Port
C5
Port
C6
Port
C7
Port
D1
Port
D2
Port
D3
Port
D4
Port
D5
Port
D6
Default alternate function
Resonator/ crystal in
Resonator/ crystal out
Timer 52 channel 3
I
I
Timer 1 - channel 3
Timer 1 - channel 4
/configurable clock output
SPI clock
PI master out/slave in
SPI master in/ slave out
SWIM data interface
Analog input 4 Timer 52 -
channel 2/ADC external
trigger
Timer 5 - channel 1/BEEP
output
Analog input 5/ UART1
data transmit
Analog input 6/ UART1
data receive
2
2
C data
C clock
Pinout and pin description
Alternate function after remap
[option bit]
SPI master/ slave select [AFR1]/
UART1 data transmit [AFR1:0]
Timer 1 - break input [AFR4]
ADC external trigger [AFR4]
Top level interrupt [AFR3] Timer
1 inverted channel 1 [AFR7]
Analog input 2 [AFR2]Timer 1
inverted channel 2 [AFR7]
Timer 5 channel 1 [AFR0]
Timer 1 channel 1 [AFR0]
Timer 1 channel 2[AFR0]
Analog input 3 [AFR2] Timer 52
- channel 3 [AFR1]
UART clock [AFR2]
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