7721 datasheet(10/577 Pages) RENESAS

10 / 577 page

7721 Group User’s Manual

iii

Table of contents

CHAPTER 8 TIMER A

8.1 Overview ..................................................................................................................................8-2

8.2 Block description .................................................................................................................. 8-3

8.2.1 Counter and reload register (timer Ai register) ......................................................... 8-4

8.2.2 Count start register........................................................................................................ 8-5

8.2.3 Timer Ai mode register ................................................................................................. 8-6

8.2.4 Timer Ai interrupt control register ............................................................................... 8-7

8.2.5 Port P5 direction register ............................................................................................. 8-8

8.3 Timer mode ............................................................................................................................ 8-9

8.3.1 Setting for timer mode ................................................................................................ 8-11

8.3.2 Count source ................................................................................................................ 8-13

8.3.3 Operation in timer mode ............................................................................................. 8-14

8.3.4 Selectable functions .................................................................................................... 8-15

[Precautions for timer mode] ................................................................................................ 8-17

8.4 Event counter mode ........................................................................................................... 8-18

8.4.1 Setting for event counter mode ................................................................................. 8-21

8.4.2 Operation in event counter mode .............................................................................. 8-23

8.4.3 Switching between countup and countdown ............................................................ 8-24

8.4.4 Selectable functions .................................................................................................... 8-25

[Precautions for event counter mode] ................................................................................. 8-28

8.5 One-shot pulse mode ......................................................................................................... 8-29

8.5.1 Setting for one-shot pulse mode ............................................................................... 8-31

8.5.2 Count source ................................................................................................................ 8-33

8.5.3 Trigger ........................................................................................................................... 8-34

8.5.4 Operation in one-shot pulse mode ............................................................................ 8-35

[Precautions for one-shot pulse mode] ............................................................................... 8-37

8.6 Pulse width modulation (PWM) mode ............................................................................ 8-38

8.6.1 Setting for PWM mode ............................................................................................... 8-40

8.6.2 Count source ................................................................................................................ 8-42

8.6.3 Trigger ........................................................................................................................... 8-42

8.6.4 Operation in PWM mode ............................................................................................ 8-43

[Precautions for PWM mode] ............................................................................................... 8-47

CHAPTER 9 TIMER B

9.1 Overview ..................................................................................................................................9-2

9.2 Block description .................................................................................................................. 9-2

9.2.1 Counter and reload register (timer Bi register) ......................................................... 9-3

9.2.2 Count start register........................................................................................................ 9-4

9.2.3 Timer Bi mode register ................................................................................................. 9-5

9.2.4 Timer Bi interrupt control register ............................................................................... 9-6

9.2.5 Port P5 direction register ............................................................................................. 9-7

9.3 Timer mode ............................................................................................................................ 9-8

9.3.1 Setting for timer mode ................................................................................................ 9-10

9.3.2 Count source ................................................................................................................ 9-11

9.3.3 Operation in timer mode ............................................................................................. 9-12

[Precautions for timer mode] ................................................................................................ 9-13

9.4 Event counter mode ........................................................................................................... 9-14

9.4.1 Setting for event counter mode ................................................................................. 9-16

9.4.2 Operation in event counter mode .............................................................................. 9-17

[Precautions for event coutner mode] ................................................................................. 9-18

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