7721 datasheet(185/577 Pages) RENESAS

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7721 데이터시트(PDF) 185 Page - Renesas Technology Corp

부품명	7721

상세설명	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	577 Pages

Scroll/Zoom	100%

제조업체	RENESAS [Renesas Technology Corp]

홈페이지	http://www.renesas.com

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185 / 577 page

7721 Group User’s Manual

TIMER B

9–18

9.4 Event counter mode

[Precautions for event counter mode]

While counting is in progress, by reading the timer Bj register, the counter value can be read out at any

timing. However, if the timer Bj register is read at the reload timing shown in Figure 9.4.4, the value

“FFFF16” is read out. If reading is performed in the period from when a value is set into the timer Bj register

with the counter stopped until the counter starts counting, the set value is correctly read out.

Fig. 9.4.4 Reading timer Bj register

n – 1

Counter value

(Hex.)

FFFF n – 1

Read value

(Hex.)

Reload

Time

n = Reload register’s contents

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