STM8S105K4 STMicroelectronics, STM8S105K4 Datasheet - Page 15

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STM8S105K4

Manufacturer Part Number
STM8S105K4
Description
Access line, 16 MHz STM8S 8-bit MCU, up to 32 Kbytes Flash, integrated EEPROM
Manufacturer
STMicroelectronics
Datasheet

Specifications of STM8S105K4

Ram
Up to 2 Kbytes
Advanced Control Timer
16-bit, 4 CAPCOM channels, 3 complementary outputs, deadtime insertion and flexible synchronization
Two Watchdog Timers
Window watchdog and independent watchdog

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STM8S105xx
4.6
Bit
PCKEN1 7
PCKEN1 6
PCKEN1 5
PCKEN1 4
Table 3: Peripheral clock gating bit assignments in CLK_PCKENR1/2 registers
Power management
For efficent power management, the application can be put in one of four different low-power
modes. You can configure each mode to obtain the best compromise between lowest power
consumption, fastest start-up time and available wakeup sources.
Peripheral
clock
TIM1
TIM3
TIM2
TIM4
-
-
Startup clock: After reset, the microcontroller restarts by default with an internal 2 MHz
clock (HSI/8). The prescaler ratio and clock source can be changed by the application
program as soon as the code execution starts.
Clock security system (CSS): This feature can be enabled by software. If an HSE clock
failure occurs, the internal RC (16 MHz/8) is automatically selected by the CSS and an
interrupt can optionally be generated.
Configurable main clock output (CCO): This outputs an external clock for use by the
application.
Wait mode: In this mode, the CPU is stopped, but peripherals are kept running. The
wakeup is performed by an internal or external interrupt or reset.
Active halt mode with regulator on: In this mode, the CPU and peripheral clocks are
stopped. An internal wakeup is generated at programmable intervals by the auto wake up
unit (AWU). The main voltage regulator is kept powered on, so current consumption is
higher than in active halt mode with regulator off, but the wakeup time is faster. Wakeup
is triggered by the internal AWU interrupt, external interrupt or reset.
Active halt mode with regulator off: This mode is the same as active halt with regulator
on, except that the main voltage regulator is powered off, so the wake up time is slower.
Halt mode: In this mode the microcontroller uses the least power. The CPU and peripheral
clocks are stopped, the main voltage regulator is powered off. Wakeup is triggered by
external event or reset.
16 MHz high-speed internal RC oscillator (HSI)
128 kHz low-speed internal RC (LSI)
Bit
PCKEN1 3
PCKEN1 2
PCKEN1 1
PCKEN1 0
Peripheral
clock
UART2
Reserved
SPI
I
2
C
DocID14771 Rev 10
Bit
PCKEN2 7
PCKEN2 6
PCKEN2 5
PCKEN2 4
Peripheral
clock
Reserved
Reserved
Reserved
Reserved
Bit
PCKEN2 3
PCKEN2 2
PCKEN2 1
PCKEN2 0
Product overview
Peripheral
clock
ADC
AWU
Reserved
Reserved
15/127

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