ST7FOXK2 datasheet(91/226 Pages) STMICROELECTRONICS

tên linh kiện	ST7FOXK2

Giải thích chi tiết về linh kiện	8-bit MCU with single voltage Flash memory, SPI, I²C, ADC, timers

PDF	226 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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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

●

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

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

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

cascaded

bits

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