AN2645 datasheet(18/36 Pages) STMICROELECTRONICS

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Block-by-block compatibility analysis

AN2645

18/36

Migration within the STM8S103x sub-family

Migration within the STM8S903x sub-family

Migration within this sub-family does not apply because it has only a 32-pin package.

3.1.3

System pins and package pinout

To ensure the fundamental compatibility of all members of the STM8S family, the key system

pins are all present and perform the same functions in all packages. This includes the

NRST, OSCIN, OSCOUT and PD1/SWIM pins.

PE1 / I2C_SCL

PB4 / AIN4 [I2C_SCL](1)

PE0 / CLK_CCO

PD0 (HS) / TIM3_CH2 [TIM1_BKIN / CLK_CCO]

PG0

Not available

PG1

Not available

PF4 / AIN12

PD7 / TLI / [TIM1_CH4]

PC4 / TIM1_CH4

I2C pins without true open drain capability

Table 15.

STM8S103x migration between 32-pin and 20-pin packages

STM8S103K

STM8S103F

PF4

Not available

PB6

Not available

PB7

Not available

PB3 / AIN3 / TIM1_ETR

PD2(HS) / AIN3 [TIM2_CH3](1)

No replacement for TIM1_ETR and TIM1_CH3N pins

PB2 / AIN2 / TIM1_CH3N

PD6 (HS) / AIN6 / UART1_RX(1)

PB1 / AIN1 / TIM1-CH2N

PD5 (HS) / AIN5 / UART1_TX

PC4(HS)/AIN2/TIM1_CH4/CLK_CCO [TIM1_CH2N]

PB0 / AIN0 / TIM1_CH1N

PD3(HS) / AIN4 / TIM2_CH2 / ADC_ETR

PC3(HS)/TIM1_CH3 [TLI] [TIM1_CH1N]

PE5 / SPI_NSS

PA3 (HS) / TIM5_CH3 [SPI_NSS]

PC1 (HS) / TIM1_CH1 /

UART1_CK

PC6 (HS) / SPI_MOSI [TIM1_CH1]

PD4 (HS) / BEEP / TIM2_CH1 / UART1_CK

PC2 (HS) / TIM1_CH2

PC7 (HS) / SPI_MISO [TIM1_CH2]

PD0 (HS) / TIM1_BKIN

[CLK_CCO]

PB5 / I2C_SDA/ [TIM1_BKIN]

PC4 (HS) / AIN2 / TIM1_CH4 / CLK_CCO [TIM1_CH2N]

PD7 / TLI [TIM1_CH4]

Not available

Table 14.

STM8S105x migration between 44-pin and 32-pin packages

STM8S105S

STM8S105K

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