M30245 datasheet(32/367 Pages) RENESAS

32 / 367 page

Rev.2.00 Oct 16, 2006

page 23 of 354

REJ09B0340-0200

M30245 Group

2. Timer A

Figure 2.2.17. Set-up procedure of two-phase pulse signal process in event counter mode, normal mode selected

Setting divide ratio

Can be set to 000016 to FFFF16

(b15)

(b8)

Start count

Selecting event counter mode and functions

1 (Must always be “1” when using two-phase pulse signal processing)

Selection of event counter mode

Two-phase pulse signal processing operation select bit

0 : Normal processing operation

Count operation type select bit (Note 1)

1 : Free-run type

0 (Must always be “0” when using two-phase pulse signal processing)

Two-phase pulse signal processing select bit

Up/down flag [Address 038416]

UDF

Timer A2 two-phase pulse signal processing select bit

1 : Two-phase pulse signal processing enabled

Timer A3 two-phase pulse signal processing select bit

1 : Two-phase pulse signal processing enabled

Setting count start flag

Timer A2 count start flag

Timer A3 count start flag

Setting trigger select register

Trigger select register [Address 038316]

TRGSR

Timer A2 event/trigger select bit

b3 b2

0 0 : Input on TA2IN is selected (Note 2)

Timer A3 event/trigger select bit

b5 b4

0 0 : Input on TA3IN is selected (Note 2)

Note 2: Set the corresponding port direction register to “0”.

0 (Must always be “0” when using two-phase pulse signal processing)

Note 1: First set to “Reload type” operation. Once the first counting pulse has occurred,

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