7702 datasheet(90/217 Pages) RENESAS

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7702/7703 Group User’s Manual

TIMER A

5.1 Overview

5–2

Timer A is used primarily for output to externals. It consists of five counters, timers A0 to A4, each equipped

with a 16-bit reload function. Timers A0 to A4 operate independently of one another.

7703 Group

Timer A4’s function of the 7703 Group varies from the 7702 Group’s. Refer to “Chapter 20. 7703 GROUP.”

5.1 Overview

Timer Ai (i = 0 to 4) has four operating modes listed below. Except for the event counter mode, Timers A0

to A4 all have the same functions.

q Timer mode

The timer counts an internally generated count source. Following functions can be used in this mode:

•Gate function

•Pulse output function

q Event counter mode

The timer counts an external signal. Following functions can be used in this mode:

•Pulse output function

•Two-phase pulse signal processing function (Timers A2, A3, and A4)

q One-shot pulse mode

The timer outputs a pulse which has an arbitrary width once.

q Pulse width modulation (PWM) mode

Timer outputs pulses which have an arbitrary width in succession. The timer functions as which pulse

width modulator as follows:

•16-bit pulse width modulator

•8-bit pulse width modulator

7702 Datasheet(PDF) 90 Page - Renesas Technology Corp