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STM32F334X4 bảng dữ liệu(PDF) 17 Page - STMicroelectronics

tên linh kiện STM32F334X4
Giải thích chi tiết về linh kiện  ARMCortex-M4 32b MCUFPU,up to 64KB Flash,16KB SRAM, 2 ADCs,3 DACs,3 comp.,op-amp, 217ps 10-ch (HRTIM1)
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STM32F334X4 bảng dữ liệu(HTML) 17 Page - STMicroelectronics

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STM32F334x4 STM32F334x6 STM32F334x8
Functional overview
43
3.6
Clocks and startup
System clock selection is performed on startup, however the internal RC 8 MHz oscillator is
selected as default CPU clock on reset. An external 4-32 MHz clock can be selected, in
which case it is monitored for failure. If failure is detected, the system automatically switches
back to the internal RC oscillator. A software interrupt is generated if enabled. Similarly, full
interrupt management of the PLL clock entry is available when necessary (for example with
failure of an indirectly used external oscillator).
Several prescalers allow to configure the AHB frequency, the high speed APB (APB2) and
the low speed APB (APB1) domains. The maximum frequency of the AHB and the high
speed APB domains is 72 MHz, while the maximum allowed frequency of the low speed
APB domain is 36 MHz.
TIM1and HRTIM1 maximum frequency is 144 MHz.



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