STM8AF6268ITCU datasheet(31/99 Pages) STMICROELECTRONICS

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STM8AF6246/48/66/68

Pinouts and pin description

6.2

Alternate function remapping

As shown in the rightmost column of Table 8, 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 9: Option bytes on page 44. 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 STM8S series and STM8AF series 8-bit microcontrollers reference manual,

RM0016).

PD6/

LINUART_RX

I/O X

O1 X

X Port D6 LINUART data receive -

32 PD7/TLI(8)

I/O X

O1 X

X Port D7 Top level interrupt

1. Refer to Table 7 for the definition of the abbreviations.

2. Reset state is shown in bold.

3. In Halt/Active-halt mode this pad behaves in the following way:

- the input/output path is disabled

- if the HSE clock is used for wakeup, the internal weak pull up is disabled

- if the HSE clock is off, internal weak pull up setting from corresponding OR bit is used

By managing the OR bit correctly, it must be ensured that the pad is not left floating during Halt/Active-halt.

4. On this pin, a pull-up resistor as specified in Table 35. I/O static characteristics is enabled during the reset phase of the

product.

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

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

not implemented)

7. The PD1 pin is in input pull-up during the reset phase and after reset release.

8. If this pin is configured as interrupt pin, it will trigger the TLI.

Table 8. STM8AF6246/48/66/68 (32 Kbyte) microcontroller pin description(1)(2) (continued)

number

Pin name

Input

Output

Default alternate

function

Alternate

function after

remap

[option bit]

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