ST72C254G2 datasheet(24/135 Pages) STMICROELECTRONICS

Numer części	ST72C254G2

Szczegółowy opis	8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES

PDF	135 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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24 / 135 page

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

The MCC block consists of:

A programmable CPU clock prescaler

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

ST72C254G2 Arkusz danych(PDF) 24 Page - STMicroelectronics