參數(shù)資料
型號: ST72E25G2D0
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 58/140頁
文件大?。?/td> 1349K
代理商: ST72E25G2D0
ST72104G, ST72215G, ST72216G, ST72254G
24/140
7.6 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 11 "MISCELLANEOUS REGIS-
TERS" on page 36 for more details.
Figure 14. Main Clock Controller (MCC) Block Diagram
DIV 2, 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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