M38B53M4-059FP datasheet(112/355 Pages) MITSUBISHI

112 / 355 page

2-24

38B5 Group User’s Manual

APPLICATION

2.2 Timer

Fig. 2.2.21 Control procedure

Fig. 2.2.20 Relevant registers setting

T34M

3F16

ICON1

Timer 34 mode register (address 2916)

Timer 3 count: In progress

Timer 3 count source: f(XIN)/16

Timer 3 output selection: Buzzer output in progress = “1”

Buzzer output stopped = “0”

Set “division ratio – 1”; 63 (3F16).

Interrupt control register 1 (address 3E16)

Timer 3 (address 2216)

Timer 3 interrupt: Disabled

RESET

SEI

P4D

ICON1

T34M

CLI

3F16

(address 0916), bit6

(address 0816), bit6

(address 3E16), bit7

(address 2916)

(address 2216)

T34M

(address 2916), bit6

(address 2216)

3F16

T34M(address 2916), bit6

Main processing

Initialization

q X: This bit is not used here. Set it to “0” or “1” arbitrarily.

•All interrupts disabled

00XX10X02

Output unit

Piezoelectric buzzer request ?

Yes

Stop of piezoelectric buzzer

output

Start of piezoelectric buzzer output

•Timer 3 interrupt disabled

•T3OUT output stopped; Buzzer output stopped

•Port state setting at buzzer output stopped; “H” level output

•Interrupts enabled

•Processing buzzer request, generated during main

processing, in output unit

M38B53M4-059FP Datasheet(PDF) 112 Page - Mitsubishi Electric Semiconductor

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