STM8AF52AA

Manufacturer Part NumberSTM8AF52AA
DescriptionSTM8AF52 CAN Line
ManufacturerSTMicroelectronics
STM8AF52AA datasheet
 


Specifications of STM8AF52AA

Max Fcpu24 MHzProgram Memory32 to 128 Kbytes Flash program; data retention 20 years at 55 °C
Data Memoryup to 2 Kbytes true data EEPROM; endurance 300 kcyclesRam2 Kbytes to 6 Kbytes
Advanced Control Timer16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization  
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STM8AF52/62xx, STM8AF51/61xx
byte area. This keyword must be entered via the SWIM interface to temporarily unlock the
device.
If desired, the temporary unlock mechanism can be permanently disabled by the user
through OPT6/NOPT6 option bytes.
5.5
Clock controller
The clock controller distributes the system clock coming from different oscillators to the core
and the peripherals. It also manages clock gating for low-power modes and ensures clock
robustness.
5.5.1
Features
Clock sources
16 MHz high-speed internal RC oscillator (HSI)
128 kHz low-speed internal RC (LSI)
1-24 MHz high-speed external crystal (HSE)
Up to 24 MHz high-speed user-external clock (HSE user-ext)
Reset: After reset the microcontroller restarts by default with an internal 2-MHz clock
(16 MHz/8). The clock source and speed can be changed by the application program
as soon as the code execution starts.
Safe clock switching: Clock sources can be changed safely on the fly in Run mode
through a configuration register. The clock signal is not switched until the new clock
source is ready. The design guarantees glitch-free switching.
Clock management: To reduce power consumption, the clock controller can stop the
clock to the core, individual peripherals or memory.
Wakeup: In case the device wakes up from low-power modes, the internal RC
oscillator (16 MHz/8) is used for quick startup. After a stabilization time, the device
switches to the clock source that was selected before Halt mode was entered.
Clock security system (CSS): The CSS permits monitoring of external clock sources
and automatic switching to the internal RC (16 MHz/8) in case of a clock failure.
Configurable main clock output (CCO): This feature permits to outputs a clock signal
for use by the application.
5.5.2
16 MHz high-speed internal RC oscillator (HSI)
Default clock after reset 2 MHz (16 MHz/8)
Fast wakeup time
User trimming
The register CLK_HSITRIMR with two trimming bits plus one additional bit for the sign
permits frequency tuning by the application program. The adjustment range covers all
possible frequency variations versus supply voltage and temperature. This trimming does
not change the initial production setting.
Doc ID 14395 Rev 8
Product overview
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