ST7PMC1K2B6(2004) 데이터 시트보기 (PDF) - STMicroelectronics

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ST7PMC1K2B6
(Rev.:2004)

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI™

STMicroelectronics 

ST7MC1/ST7MC2

5.1 OSCILLATOR

The main clock of the ST7 can be generated by a

crystal or ceramic resonator oscillator or an exter-

nal source.

The associated hardware configurations are

shown in Table 4. Refer to the electrical character-

istics section for more details.

External Clock Source

In this external clock mode, a clock signal (square,

sinus or triangle) with ~50% duty cycle has to drive

the OSC1 pin while the OSC2 pin is not connect-

ed.

Crystal/Ceramic Oscillators

This family of oscillators has the advantage of pro-

ducing a very accurate rate on the main clock of

the ST7. In this mode, the resonator and the load

capacitors have to be placed as close as possible

to the oscillator pins in order to minimize output

distortion and start-up stabilization time.

This oscillator is not stopped during the RESET

phase to avoid losing time in its start-up phase.

See Electrical Characteristics for more details.

Table 4. ST7 Clock Sources

Hardware Configuration

ST7

OSC1

OSC2

NC

EXTERNAL

SOURCE

ST7

OSC1

OSC2

CL1

CL2

LOAD

CAPACITORS

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