ST72344S2 datasheet(99/247 Pages) STMICROELECTRONICS

99 / 247 page

ST72344xx, ST2345xx

On-chip peripherals

Doc ID 12321 Rev 6

99/247

the ICIE bit is set. This can be avoided if the input capture function i is disabled by reading

the ICiHR (see note 1).

The TOF bit can be used with interrupt in order to measure events that go beyond the timer

range (FFFFh).

Figure 47.

Input capture block diagram

Figure 48.

Input capture timing diagram

The active edge is the rising edge.

The time between an event on the ICAPi pin and the appearance of the corresponding flag is from 2 to 3

CPU clock cycles. This depends on the moment when the ICAP event happens relative to the timer clock.

Output compare

In this section, the index, i, may be 1 or 2 because there are 2 output compare functions in

the 16-bit timer.

This function can be used to control an output waveform or indicate when a period of time

has elapsed.

ICIE

CC0

CC1

16-BIT FREE RUNNING

COUNTER

IEDG1

(Control Register 1) CR1

(Control Register 2) CR2

ICF2

ICF1

(Status Register) SR

IEDG2

ICAP1

ICAP2

EDGE DETECT

CIRCUIT2

16-BIT

IC1R Register

IC2R Register

EDGE DETECT

CIRCUIT1

FF01

FF02

FF03

TIMER CLOCK

COUNTER REGISTER

ICAPi PIN

ICAPi FLAG

ICAPi REGISTER

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