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TIMER A

7906 Group User’s Manual Rev.2.0

7-2

7.1 Overview

Timer A consists of ten counters, Timers A0 to A9, each equipped with a 16-bit reload function. Timers A0

to A9 operate independently of one other.

Each timer is equipped with the different operating mode; therefore, in this chapter, timers are referred to

as follows:

• Timers A0 to A9; timer Ai ( i = 0 to 9)

• Timer A, equipped with the I/O function; timer Aj (j = 0 to 2, 4, 9)

• Timer A, not equipped with the I/O function; timer Ak (k = 3, 5 to 8)

Timer Aj (j = 0 to 2, 4, 9) has four operating modes listed below. Except for the event counter mode, timer

Aj has the same functions.

Timer Ak (k = 3, 5 to 8) is equipped with the timer mode only.

Table 7.1.1 lists the functions of timer Ai (i = 0 to 9).

(1)

Timer mode : timer Ai (i = 0 to 9)

In this mode, the timer counts an internally generated count source. For timer Aj (j = 0 to 2, 4, 9),

following functions can be used in this mode:

• Gate function

• Pulse output function

(2)

Event counter mode : timer Aj (j = 0 to 2, 4, 9)

In this 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, A4, and A9)

(3)

One-shot pulse mode : timer Aj (j = 0 to 2, 4, 9)

In this mode, the timer outputs a pulse which has an arbitrary width once.

(4)

Pulse width modulation (PWM) mode : timer Aj (j = 0 to 2, 4, 9)

In this mode, the timer outputs pulses which have an arbitrary width in succession. In this mode, the

timer serves as one of the following pulse width modulators:

• 16-bit pulse width modulator

• 8-bit pulse width modulator

7.1 Overview

7906 Datasheet(PDF) 105 Page - Renesas Technology Corp