Datasheet

STM8S105xx
Product overview
The application software must refresh the counter before time-out and during a limited time
window.
A reset is generated in two situations:
1. Timeout: At 16 MHz CPU clock the time-out period can be adjusted between 75 µs up
to 64 ms.
2. Refresh out of window: The downcounter is refreshed before its value is lower than
the one stored in the window register.
Independent watchdog timer
The independent watchdog peripheral can be used to resolve processor malfunctions due
to hardware or software failures.
It is clocked by the 128 kHz LSI internal RC clock source, and thus stays active even in
case of a CPU clock failure
The IWDG time base spans from 60 µs to 1 s.
4.7 Auto wakeup counter
• Used for auto wakeup from active halt mode
• Clock source: Internal 128 kHz internal low frequency RC oscillator or external clock
• LSI clock can be internally connected to TIM3 input capture channel 1 for calibration
4.8 Beeper
The beeper function outputs a signal on the BEEP pin for sound generation. The signal is
in the range of 1, 2 or 4 kHz.
The beeper output port is only available through the alternate function remap option bit
AFR7.
4.9 TIM1 - 16-bit advanced control timer
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
• Four independent capture/compare channels (CAPCOM) configurable as input
capture, output compare, PWM generation (edge and center aligned mode) and single
pulse mode output
• Synchronization module to control the timer with external signals
• Break input to force the timer outputs into a defined state
• Three complementary outputs with adjustable dead time
• Encoder mode
• Interrupt sources: 3 x input capture/output compare, 1 x overflow/update, 1 x break
4.10 TIM2, TIM3 - 16-bit general purpose timers
• 16-bit autoreload (AR) up-counter
• 15-bit prescaler adjustable to fixed power of 2 ratios 1…32768
• Timers with 3 or 2 individually configurable capture/compare channels
• PWM mode
• Interrupt sources: 2 or 3 x input capture/output compare, 1 x overflow/update
DocID14771 Rev 13 15/99