st7fmc2s7t6 STMicroelectronics, st7fmc2s7t6 Datasheet - Page 28

• Manufacturer Part Number: st7fmc2s7t6
• Description: 8-bit Mcu With Nested Interrupts, Flash, 10-bit Adc, Brushless Motor Control, Five Timers, Spi, Linsci
• Manufacturer: STMicroelectronics

ST7MC1/ST7MC2
6.1 OSCILLATOR
The main clock of the ST7 can be generated by a
Table 4. ST7 Clock Sources
crystal or ceramic resonator oscillator or an exter-
Hardware Configuration
nal source.
The associated hardware configurations are
shown in
Table
4. Refer to the electrical character-
ST7
istics section for more details.
OSC1
OSC2
External Clock Source
In this external clock mode, a clock signal (square,
NC
sinus or triangle) with ~50% duty cycle has to drive
EXTERNAL
the OSC1 pin while the OSC2 pin is not connect-
SOURCE
ed.
Crystal/Ceramic Oscillators
This family of oscillators has the advantage of pro-
ST7
ducing a very accurate rate on the main clock of
OSC1
OSC2
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
C
C
L1
L2
phase to avoid losing time in its start-up phase.
LOAD
CAPACITORS
See Electrical Characteristics for more details.
Note: When crystal oscillator is used as a clock
source, a risk of failure may exist if no series resis-
tors are implemented.
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