STM8AF51XX datasheet(32/100 Pages) STMICROELECTRONICS

32 / 100 page

Pinouts and pin description

STM8AF61xx, STM8AF51xx

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6.2.1

Alternate function remapping

As shown in the rightmost column of Table 6, some alternate functions can be remapped at different I/O

ports by programming one of eight AFR (alternate function remap) option bits. Refer to Section 10:

Option bytes on page 49. 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 STM8A microcontroller family reference manual, RM0009).

73 57 41 25 PD0/TIM3_CC2

I/O

HS O3

X Port D0

Timer 3 - channel

TIM1_BKIN

[AFR3]/

CLK_CCO

[AFR2]

74 58 42 26 PD1/SWIM

I/O

XHS O4

X Port D1

SWIM data

interface

75 59 43 27 PD2/TIM3_CC1

I/O

HS O3

X Port D2

Timer 3 - channel

TIM2_CC3

[AFR1]

76 60 44 28 PD3/TIM2_CC2

I/O

HS O3

X Port D3

Timer 2 - channel

ADC_ETR

[AFR0]

77 61 45 29

PD4/TIM2_CC1/B

EEP

I/O

HS O3

X Port D4

Timer 2 - channel

BEEP

output

[AFR7]

78 62 46 30

PD5/

LINUART_TX

I/O

X Port D5

LINUART data

transmit

79 63 47 31

PD6/

LINUART_RX

I/O

Port D6

LINUART data

receive

Caution: This pin must be held low

during power on

80 64 48 32 PD7/TLI

I/O

X Port D7

Top level interrupt

TIM1_CC4

[AFR4]

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

implemented)

Table 6.

STM8A microcontroller family pin description (continued)

Pin number

Pin name

Input

Output

Main

function

(after

reset)

Default alternate

function

Alternate

function

after

remap

[option bit]

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