ST7PLITE39F2U6TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7PLITE39F2U6TR

8-bit MCU with single voltage Flash, data EEPROM, ADC, timers, SPI, LINSCI™

STMicroelectronics 

ST7LITE3xF2

DUAL 12-BIT AUTORELOAD TIMER 3 (Cont’d)

11.2.3.3 Input Capture Mode

The 12-bit ATICR register is used to latch the val-

ue of the 12-bit free running upcounter CNTR1 af-

ter a rising or falling edge is detected on the ATIC

pin. When an input capture occurs, the ICF bit is

set and the ATICR register contains the value of

the free running upcounter. An IC interrupt is gen-

erated if the ICIE bit is set. The ICF bit is reset by

reading the ATICRH/ATICRL register when the

ICF bit is set. The ATICR is a read only register

and always contains the free running upcounter

value which corresponds to the most recent input

capture. Any further input capture is inhibited while

the ICF bit is set.

Figure 42. Block Diagram of Input Capture Mode

ATIC

12-BIT INPUT CAPTURE REGISTER

ATICR

IC INTERRUPT

ATCSR

REQUEST

ICF ICIE CK1 CK0

fLTIMER

(1 ms

timebase

@ 8MHz)

fCPU

OFF

CNTR1

12-BIT UPCOUNTER1

12-BIT AUTORELOAD REGISTER

ATR1

Figure 43. Input Capture timing diagram

fCOUNTER

COUNTER1 01h

02h

03h

04h

05h

06h

07h

08h

09h

0Ah

ATIC PIN

ICF FLAG

xxh

INTERRUPT

ATICR READ

INTERRUPT

04h

09h

t

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