M38047FEHKP datasheet(166/387 Pages) RENESAS

166 / 387 page

2-42

APPLICATION

2.3 Timer

Rev.1.00 Jan 14, 2005

REJ09B0212-0100Z

3804 Group (Spec.H)

Fig. 2.3.26 Relevant registers setting

TZM

TZH

FF16

TZL

INTSEL

INT0/timer Z interrupt source: Timer Z interrupt

INT4/CNTR2 interrupt source: CNTR2 interrupt

Timer Z mode register (address 002A16)

Timer Z operating mode: Pulse width measurement mode

Timer Z count: Stop

Clear to “0” when starting count

Timer Z high-order (address 002916)

Timer Z low-order (address 002816)

Set initial value “FFFF16” before starting pulse

width measurement. (When not setting the

initial value, count is started from the timer

value before measurement start.)

Interrupt source selection register (address 003916)

Write in latch and timer at the same time

CNTR2 active edge switch: “H” level width measurement

IREQ1

Interrupt request register 1 (address 003C16)

Timer Z interrupt request

(Set to “1” automatically when Timer Z underflows)

Timer Z interrupt: Enabled

ICON1

Interrupt control register 1 (address 003E16)

IREQ2

Interrupt request register 2 (address 003D16)

CNTR2 interrupt request

(Set to “1” automatically when “H” level input came to the end)

TYZCSS

Timer Y, Z count source selection register (address 000F16)

Timer Z count source: f(XIN)/16

FF16

CNTR2 interrupt: Enabled

ICON2

Interrupt control register 2 (address 003F16)

P4D

Port P4 direction register (address 000916)

P47/CNTR2: Input mode

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