STM8AF628ATCY STMicroelectronics, STM8AF628ATCY Datasheet - Page 19

• Manufacturer Part Number: STM8AF628ATCY
• Description: 8-bit Microcontrollers - MCU 8-Bit Automotive MCU EEPROM 128kb Flash
• Manufacturer: STMicroelectronics

Specifications of STM8AF628ATCY

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: STM8A
• Data Bus Width: 8 bit

STM8AF52/62xx, STM8AF51/61xx
5.5.3
5.5.4
5.5.5
5.5.6
128 kHz low-speed internal RC oscillator (LSI)
The frequency of this clock is 128 kHz and it is independent from the main clock. It drives
the independent watchdog or the AWU wakeup timer.
In systems which do not need independent clock sources for the watchdog counters, the
128 kHz signal can be used as the system clock. This configuration has to be enabled by
setting an option byte (OPT3/OPT3N, bit LSI_EN).
24 MHz high-speed external crystal oscillator (HSE)
The external high-speed crystal oscillator can be selected to deliver the main clock in
normal Run mode. It operates with quartz crystals and ceramic resonators.
●
●
●
External clock input
An external clock signal can be applied to the OSCIN input pin of the crystal oscillator. The
frequency range is 0 to 24 MHz.
Clock security system (CSS)
The clock security system protects against a system stall in case of an external crystal clock
failure.
In case of a clock failure an interrupt is generated and the high-speed internal clock (HSI) is
automatically selected with a frequency of 2 MHz (16 MHz/8).
Table 6.
Frequency range: 1 MHz to 24 MHz
Crystal oscillation mode: preferred fundamental
I/Os: standard I/O pins multiplexed with OSCIN, OSCOUT
Peripheral clock gating bits (CLK_PCKENR1)
Control bit
PCKEN17
PCKEN16
PCKEN15
PCKEN14
PCKEN13
PCKEN12
PCKEN11
PCKEN10
Doc ID 14395 Rev 9
Peripheral
LINUART
USART
TIM1
TIM3
TIM2
TIM4
SPI
I
2
C
Product overview
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