STM8S105C4B3CTR datasheet(28/127 Pages) STMICROELECTRONICS

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Alternate

function after

remap

[option bit]

Default alternate

function

Main function

(after reset)

Output

Input

Type

name

Pin number

Speed

High

sink

Ext.

interrupt

wpu

floating

SDIP32

LQFP32/

VFQFPN32/

UFQFPN32

LQFP44

LQFP48

TIM1_ BKIN

[AFR3]/

Timer 3 -

channel 2

Port D0

I/O

PD0/

TIM3_

CH2

[TIM1_

CLK_ CCO

[AFR2]

BKIN]

[CLK_

CCO]

SWIM data

interface

Port D1

I/O

PD1/

SWIM

TIM2_CH3

[AFR1]

Timer 3 -

channel 1

Port D2

I/O

PD2/

TIM3_

CH1

[TIM2_

CH3]

ADC_ ETR

[AFR0]

Timer 2 -

channel 2

Port D3

I/O

PD3/

TIM2_

CH2

[ADC_

ETR]

BEEP output

[AFR7]

Timer 2 -

channel 1

Port D4

I/O

PD4/

TIM2_

CH1

[BEEP]

UART2 data

transmit

Port D5

I/O

PD5/

UART2_

UART2 data

receive

Port D6

I/O

PD6/

UART2_

TIM1_ CH4

[AFR4]

Top level interrupt

Port D7

I/O

PD7/

TLI

[TIM1_

CH4]

(1)

AIN12 is not selectable in ADC scan mode or with analog watchdog.

(2)

In 44-pin package, AIN9 cannot be used by ADC scan mode.

(3)

In the open-drain output column, ‘T’ defines a true open-drain I/O (P-buffer and protection diode to VDD are not implemented).

Alternate function remapping

5.1.1

As shown in the rightmost column of the pin description table, some alternate functions can

be remapped at different I/O ports by programming one of eight AFR (alternate function

remap) option bits. When the remapping option is active, the default alternate function is no

longer available.

To use an alternate function, the corresponding peripheral must be enabled in the peripheral

registers.

Alternate function remapping does not effect GPIO capabilities of the I/O ports (see the GPIO

section of the family reference manual, RM0016).

DocID14771 Rev 9

28/127

STM8S105xx

Pinout and pin description

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