STM8L101 STMICROELECTRONICS [STMicroelectronics], STM8L101 Datasheet - Page 12

• Manufacturer Part Number: STM8L101
• Description: 8-bit ultralow power microcontroller with up to 8 Kbytes Flash multifunction timers, comparators, USART, SPI, I2C
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Product overview
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Auto-wakeup counter
The auto-wakeup (AWU) counter is used to wakeup the device from Active-halt mode.
General purpose and basic timers
STM8L101xx devices contain two 16-bit general purpose timers (TIM2 and TIM3) and one
8-bit basic timer (TIM4).
16-bit general purpose timers
The 16-bit timers consist of 16-bit up/down auto-reload counters driven by a programmable
prescaler. They perform a wide range of functions, including:
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8-bit basic timer
The 8-bit timer consists of an 8-bit up auto-reload counter driven by a programmable
prescaler. It can be used for timebase generation with interrupt generation on timer overflow.
Beeper
The STM8L101xx devices include a beeper function used to generate a beep signal in the
range of 1, 2 or 4 kHz when the LSI clock is operating at a frequency of 38 kHz.
Infrared (IR) interface
The STM8L101xx devices contain an infrared interface which can be used with an IR LED
for remote control functions. Two timer output compare channels are used to generate the
infrared remote control signals.
Comparators
The STM8L101xx features two zero-crossing comparators (COMP1 and COMP2) sharing
the same current bias and voltage reference. The voltage reference can be internal
(comparison with ground) or external (comparison to a reference pin voltage).
Each comparator is connected to 4 channels, which can be used to generate interrupt, timer
input capture or timer break. Their polarity can be inverted.
Time base generation
Measuring the pulse lengths of input signals (input capture)
Generating output waveforms (output compare, PWM and One pulse mode)
Interrupt capability on various events (capture, compare, overflow, break, trigger)
Synchronization with other timers or external signals (external clock, reset, trigger and
enable)
Doc ID 15275 Rev 11
STM8L101xx