UPD17062 datasheet(135/298 Pages) RENESAS

135 / 298 page

133

µPD17062

12. TIMER

The timer functions are used to manage the time in creating programs.

12.1

TIMER CONFIGURATION

Fig. 12-1 shows the configuration of the timer.

The timer consists of two blocks, timer carry flip-flop (timer carry FF) block and timer interrupt block, as

shown in Fig. 12-1.

The clock generation circuit, which specifies time intervals for the timer carry FF and timer interrupts,

consists of an 8 MHz frequency divider, selector A, selector B, bias circuit, and a timer mode select register

(BTM0CK at address 09H), which is a control register.

12.1.1

Timer Carry FF Block Configuration

The timer carry FF block consists of selector A, timer carry FF, a timer carry FF judge register (BTM0CYJDG

at address 17H), which is a control register, as shown in Fig. 12-1.

12.1.2

Timer Interrupt Block Configuration

The timer interrupt block consists of selector B, an interrupt control block, an interrupt permission register

(INTPM at address 2FH), which is a control register, and an interrupt request register (INTREQ at address 3FH),

as shown in Fig. 12-1.

Fig. 12-1

Timer Configuration

09H

2FH

3FH

17H

b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0

10 Hz

50 Hz

200 Hz

8 MHz

50/60 Hz

100 ms (10 Hz), 20 ms (50 Hz), or 5 ms (200 Hz) can be selected.

Control register

Address

Bit

Flag symbol

Timer mode

select

(BTM0CK)

Interrupt

permission

(INTPM)

Interrupt

request

(INTREQ)

Timer carry

FF judge

(BTM0CYJDG)

Selector

Interrupt

control block

Interrupt

request

signal

Frequency

divider

Timer interrupt block

Selector

Timer carry FF

Bias

Timer carry FF block

UPD17062 Datasheet(PDF) 135 Page - Renesas Technology Corp

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