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ST72C254G2 bảng dữ liệu(PDF) 24 Page - STMicroelectronics

tên linh kiện ST72C254G2
Giải thích chi tiết về linh kiện  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES
PDF  135 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72C254G2 bảng dữ liệu(HTML) 24 Page - STMicroelectronics

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ST72104G, ST72215G, ST72216G, ST72254G
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6.6 MAIN CLOCK CONTROLLER (MCC)
The Main Clock Controller (MCC) supplies the
clock for the ST7 CPU and its internal peripherals.
It allows SLOW power saving mode to be man-
aged by the application.
All functions are managed by the Miscellaneous
register 1 (MISCR1).
The MCC block consists of:
s
A programmable CPU clock prescaler
s
A clock-out signal to supply external devices
The prescaler allows the selection of the main
clock frequency and is controlled by three bits of
the MISCR1: CP1, CP0 and SMS.
The clock-out capability consists of a dedicated
I/O port pin configurable as an fCPU clock output to
drive external devices. It is controlled by the MCO
bit in the MISCR1 register.
See Section 10 ”MISCELLANEOUS REGIS-
TERS” on page 36 for more details.
Figure 14. Main Clock Controller (MCC) Block Diagram
DIV2,4,8,16
DIV 2
SMS
CP1 CP0
CPU CLOCK
MISCR1
CLOCK TO CAN
TO CPU AND
PERIPHERALS
fOSC
fCPU
MCO
PORT
FUNCTION
ALTERNATE
MCO
-
-
-
-
fOSC/2
PERIPHERAL



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