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ST7FOXK2 Datasheet(PDF) 91 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) 91 Page - STMicroelectronics

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ST7FOXF1, ST7FOXK1, ST7FOXK2
On-chip peripherals
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Figure 45.
Input capture timing diagram
Long range input capture
Pulses that last more than 8 µs can be measured with an accuracy of 4 µs if fOSC equals 8
MHz in the following conditions:
●
The 12-bit AT4 timer is clocked by the Lite timer (RTC pulse: CK[1:0] = 01 in the ATCSR
register)
●
The ICS bit in the ATCSR2 register is set so that the LTIC pin is used to trigger the AT4
timer capture.
●
The signal to be captured is connected to LTIC pin
●
Input Capture registers LTICR, ATICRH and ATICRL are read
This configuration allows to cascade the Lite timer and the 12-bit AT4 timer to get a 20-bit
Input Capture value. Refer to Figure 46.
Figure 46.
Long range input capture block diagram
COUNTER1
t
01h
fCOUNTER
xxh
02h
03h
04h
05h
06h
07h
04h
ATIC PIN
ICF FLAG
INTERRUPT
08h
09h
0Ah
INTERRUPT
ATICR READ
09h
LTIC
ATIC
ICS
1
0
12-bit Input Capture register
OFF
fcpu
fLTIMER
12-bit Upcounter1
12-bit AutoReload register
8-bit Input Capture register
8-bit Timebase Counter1
fOSC/32
LTICR
CNTR1
ATICR
ATR1
8 LSB bits
12 MSB bits
LITE TIMER
12-bit ARTIMER
20
cascaded
bits



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