7641 datasheet(157/385 Pages) RENESAS

157 / 385 page

Rev.2.00

Aug 28, 2006

page 26 of 148

7641 Group

REJ09B0336-0200

APPLICATION

2.2 Timer

Fig. 2.2.18 Control procedure

RESET

SEI

CCR

CPMA

P4D

TMX

TXL

TXH

ICONB

CLI

3F16

0016

(address 1F16), bit7

(address 0016)

(address 1816), bit3

(address 1916), bit3

(address 2716)

(address 2016)

(address 2116)

(address 0616), bit4

TXM

TXL

TXH

(address 2716), bit7

(address 2016)

(address 2116)

3F16

0016

TXM

(address 2716), bit7

Main processing

Initialization

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

•All interrupts disabled

•

φ = f(XIN)/2

Output unit

Piezoelectric buzzer request ?

Yes

Stop of piezoelectric buzzer

output

Start of piezoelectric buzzer output

•Timer X interrupt disabled

•CNTR0 output stopped; Buzzer output stopped

•Port P43/CNTR0 state setting at buzzer output stopped;

“H” level output

•Interrupts enabled

•Processing buzzer request, generated during main

processing, in output unit

00001XXX2

100100002

7641 Datasheet(PDF) 157 Page - Renesas Technology Corp

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