M38045F2HKP datasheet(149/387 Pages) RENESAS

149 / 387 page

2-25

APPLICATION

2.3 Timer

Rev.1.00 Jan 14, 2005

REJ09B0212-0100Z

3804 Group (Spec.H)

Fig. 2.3.6 Structure of Timer XY mode register

Timer X /Timer Y operation

modes

Timer mode

Pulse output mode

Event counter mode

Pulse width measurement mode

CNTR0 / CNTR1 active edge switch bit

(bits 2, 6 of address 002316) contents

“0” CNTR0 / CNTR1 interrupt request occurrence: Falling edge

; No influence to timer count

“1” CNTR0 / CNTR1 interrupt request occurrence: Rising edge

; No influence to timer count

“0” Pulse output start: Beginning at “H” level

CNTR0 / CNTR1 interrupt request occurrence: Falling edge

“1” Pulse output start: Beginning at “L” level

CNTR0 / CNTR1 interrupt request occurrence: Rising edge

“0” Timer X / Timer Y: Rising edge count

CNTR0 / CNTR1 interrupt request occurrence: Falling edge

“1” Timer X / Timer Y: Falling edge count

CNTR0 / CNTR1 interrupt request occurrence: Rising edge

“0” Timer X / Timer Y: “H” level width measurement

CNTR0 / CNTR1 interrupt request occurrence: Falling edge

“1” Timer X / Timer Y: “L” level width measurement

CNTR0 / CNTR1 interrupt request occurrence: Rising edge

Table 2.3.1 CNTR0 /CNTR1 active edge switch bit function

Timer XY mode register

b7 b6 b5 b4 b3 b2 b1 b0

Timer XY mode register

(TM: address 002316)

Name

Functions

At reset R W

Refer to Table 2.3.1

Timer X operating

mode bits

Timer Y operating

mode bits

0: Count start

1: Count stop

Refer to Table 2.3.1

0: Count start

1: Count stop

b5 b4

0 0: Timer mode

0 1: Pulse output mode

1 0: Event counter mode

1 1: Pulse width

measurement mode

b1 b0

0 0: Timer mode

0 1: Pulse output mode

1 0: Event counter mode

1 1: Pulse width

measurement mode

Timer Y count stop

bit

CNTR1 active edge

switch bit

Timer X count stop

bit

CNTR0 active edge

switch bit

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