38K2 datasheet(183/358 Pages) RENESAS

Part #	38K2

Description	RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

PDF	358 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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183 / 358 page

2.3 Timer

Rev.2.00

Oct 15, 2006

page 34 of 112

38K2 Group

REJ09B0338-0200

APPLICATION

Fig. 2.3.18 Related registers setting

PRE12

PREX

249

255

ICON1

IREQ1

Timer X interrupt: Disabled

Timer 1 interrupt: Enabled

Timer X mode register (address 2316)

Timer X operating mode: Event counter mode

Timer X count: Stop

Clear to “0” when starting count.

Prescaler 12 (address 2016)

Timer X (address 2516)

Set “division ratio – 1”.

Interrupt control register 1 (address 3E16)

CNTR0 active edge selection: Falling edge count

Prescaler X (address 2416)

Timer 1 (address 2116)

Interrupt request register 1 (address 3C16)

Judge Timer X interrupt request bit.

( “1” of this bit when reading the count value indicates the 256 or more

pulses input in the condition of Timer X = 255)

Set 255 just before counting pulses.

(After a certain time has passed, the number of input

pulses is decreased from this value.)

38K2 Datasheet(PDF) 183 Page - Renesas Technology Corp