st7pmc2s6 STMicroelectronics, st7pmc2s6 Datasheet - Page 44

• Manufacturer Part Number: st7pmc2s6
• Description: 8-bit Mcu For Automotive With Nested Interrupts, Flash, 10-bit Adc, Brushless Motor Control, 5 Timers, Spi, Linsci?
• Manufacturer: STMicroelectronics

Supply, reset and clock management
6.3
6.3.1
Note:
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Oscillator
The main clock of the ST7 can be generated by a crystal or ceramic resonator oscillator or
an external source.
The associated hardware configurations are shown in
characteristics 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 connected.
Crystal/ceramic oscillators
This family of oscillators has the advantage of producing 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
When crystal oscillator is used as a clock source, a risk of failure may exist if no series
resistors are implemented.
Table 6.
Section 12: Electrical characteristics
ST7 clock sources
C
ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto,
L1
Hardware configuration
External
source
OSC1
OSC1
capacitors
Load
ST7
ST7
for more details.
OSC2
OSC2
Table
NC
6. Refer to the electrical
C
L2