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AN3342 Datasheet(PDF) 9 Page - STMicroelectronics

Part # AN3342
Description  Getting started with STM8TL5xxx
PDF  39 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3342 Datasheet(HTML) 9 Page - STMicroelectronics

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AN3342
Clock management
Doc ID 18461 Rev 3
9/39
3
Clock management
The STM8TL5xxx has no external clock so no precautionary measures are needed.
3.1
Internal clocks
STM8TL5xxx devices have three kinds of internal clock: A high speed internal clock (HSI)
running at 16 MHz, a low speed internal clock (LSI) running at 38 kHz and a high speed
internal clock dedicated to the ProxSense (HSI_PXS) running at 16 MHz. The HSI_PXS
clock runs once the ProxSense is enabled if the LowPower bit is reset. If LowPower bit is set
HSI_PXS clock runs only when an acquisition is being performed.
After reset, the CPU starts at speed of 2 MHz driven by the internal RC (HSI clock signal)
divided by 8.



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