7906 datasheet(192/531 Pages) RENESAS

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PULSE OUTPUT PORT MODE

7906 Group User’s Manual Rev.2.0

9-11

9.2 Block description

9.2.4 Timers A0 to A4

Timers A0 and A3 are used as control registers; each generates a pulse output trigger. When using timers

A0 and A3, be sure to use them in the timer mode. (Refer to section “7.3 Timer mode.”)

When performing the pulse width modulation, be sure to use timers A1, A2, A4 in the pulse width modulation

mode. (Refer to section “7.6 Pulse width modulation (PWM) mode.”) Note that, from pin P20/TA4OUT, a

PWM pulse by timer A4 is output. When it is unnecessary to output a PWM pulse, be sure to clear bit 2

of the timer A4 mode register (address 5A16) to “0.” At this time, pin P20 can be used as a programmable

I/O port pin.

Figure 9.2.6 shows the structure of the timer A0 and A3 mode registers (in the pulse output port mode);

Figure 9.2.7 shows the structures of the timer A1, A2, A4 mode registers (in the pulse output port mode

with pulse width modulation used).

Fig. 9.2.6 Structure of timer A0 and A3 mode registers (in pulse output port mode)

Bit name

Bit

Timer A0 mode register (Address 5616)

Timer A3 mode register (Address 5916)

Functions

At reset

R/W

Fix these bits to “0000002” in the pulse output port mode.

Count source select bits

b7 b6 b5 b4 b3 b2 b1 b0

See Table 7.2.3.

7906 Datasheet(PDF) 192 Page - Renesas Technology Corp