STM8AL3188TCX datasheet(22/131 Pages) STMICROELECTRONICS

22 / 131 page

Functional overview

STM8AL318x STM8AL3L8x

22/131

DocID027179 Rev 6

3.12

System configuration controller and routing interface

The system configuration controller provides the capability to remap some alternate

functions on different I/O ports. TIM4 and ADC1 DMA channels can also be remapped.

The highly flexible routing interface allows application software to control the routing of

different I/Os to the TIM1 timer input captures. It also controls the routing of internal analog

signals to ADC1, COMP1, COMP2, DAC1 and the internal reference voltage VREFINT. It also

provides a set of registers for efficiently managing the charge transfer acquisition sequence.

3.13

Timers

The high-density STM8AL3x8x devices contain one advanced control timer (TIM1), three

16-bit general purpose timers (TIM2,TIM3 and TIM5) and one 8-bit basic timer (TIM4).

All the timers are served by DMA1.

Table 3 compares the features of the advanced control, general-purpose and basic timers.

3.13.1

16-bit advanced control timer (TIM1)

This is a high-end timer designed for a wide range of control applications. With its

complementary outputs, dead-time control and center-aligned PWM capability, the field of

applications is extended to motor control, lighting and half-bridge driver.

•

16-bit up, down and up/down autoreload counter with 16-bit prescaler

•

3 independent capture/compare channels (CAPCOM) configurable as input capture,

output compare, PWM generation (edge and center aligned mode) and single pulse

mode output

•

1 additional capture/compare channel which is not connected to an external I/O

•

Synchronization module to control the timer with external signals

•

Break input to force timer outputs into a defined state

•

3 complementary outputs with adjustable dead time

•

Encoder mode

•

Interrupt capability on various events (capture, compare, overflow, break, trigger)

Table 3. Timer feature comparison

Timer

Counter

resolution

Counter

type

Prescaler factor

DMA1

request

generation

Capture/compare

channels

Complementary

outputs

TIM1

16-bit

up/down

Any integer

from 1 to 65536

Yes

3 + 1

TIM2

Any power of 2

from 1 to 128

None

TIM3

TIM5

TIM4

8-bit

Any power of 2

from 1 to 32768

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