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ST7FOXK2 Datasheet(PDF) 38 Page - STMicroelectronics

Part # ST7FOXK2
Description  8-bit MCU with single voltage Flash memory, SPI, I²C, ADC, timers
PDF  226 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7FOXK2 Datasheet(HTML) 38 Page - STMicroelectronics

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Supply, reset and clock management
ST7FOXF1, ST7FOXK1, ST7FOXK2
38/226
Figure 12.
Clock management block diagram
6.2
Multi-oscillator (MO)
The main clock of the ST7 can be generated by four different source types coming from the
multi-oscillator block (1 to 16 MHz):
●
An external source
●
5 different configurations for crystal or ceramic resonator oscillators
●
An internal high frequency RC oscillator
Each oscillator is optimized for a given frequency range in terms of consumption and is
selectable through the option byte. The associated hardware configurations are shown in
Table 8. Refer to the electrical characteristics section for more details.
CR6
CR9
CR2
CR3
CR4
CR5
CR8
CR7
fOSC
MCCSR
SMS
MCO
MCO
fCPU
fCPU
TO CPU AND
PERIPHERALS
(1ms timebase @ 8 MHz fOSC)
/32 DIVIDER
fOSC
fOSC/32
fOSC
fLTIMER
1
0
LITE TIMER 2 COUNTER
8-BIT
AT TIMER 2
12-BIT
CLKIN
OSC2
CLKIN
Tunable
Oscillator
RC
/2
DIVIDER
Option bits
CLKSEL[1:0]
OSC
1-16 MHz
CLKIN
CLKIN
/OSC1
OSC
/2
DIVIDER
OSC/2
CLKIN/2
CLKIN/2
Option bits
CLKSEL[1:0]
CR1
CR0
or 32kHz
CKCNTCSR
RC/AWU
Clock controller
fCPU
AWU RC OSC
8 MHz
2 MHz
1 MHz
4 MHz
Prescaler
8 MHz (fRC)
RC OSC
500 kHz
CK2
CK1
CK0
PSCR
RCCRH
RCCRL



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