R8C2A datasheet(13/609 Pages) RENESAS

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21.

Electrical Characteristics ............................................................................................................ 520

22.

Usage Notes ............................................................................................................................... 545

22.1

Notes on Clock Generation Circuit ....................................................................................................... 545

22.1.1

Stop Mode ......................................................................................................................................... 545

22.1.2

Wait Mode ........................................................................................................................................ 545

22.1.3

Oscillation Stop Detection Function ................................................................................................. 545

22.1.4

Oscillation Circuit Constants ............................................................................................................ 545

22.2

Notes on Interrupts ................................................................................................................................ 546

22.2.1

Reading Address 00000h .................................................................................................................. 546

22.2.2

SP Setting .......................................................................................................................................... 546

22.2.3

External Interrupt and Key Input Interrupt ....................................................................................... 546

22.2.4

Changing Interrupt Sources .............................................................................................................. 547

22.2.5

Changing Interrupt Control Register Contents ................................................................................. 548

22.3

Notes on Timers .................................................................................................................................... 549

22.3.1

Notes on Timer RA ........................................................................................................................... 549

22.3.2

Notes on Timer RB ........................................................................................................................... 550

22.3.3

Notes on Timer RC ........................................................................................................................... 554

22.3.4

Notes on Timer RD ........................................................................................................................... 555

22.3.5

Notes on Timer RE ........................................................................................................................... 561

22.3.6

Notes on Timer RF ........................................................................................................................... 564

22.4

Notes on Serial Interface ....................................................................................................................... 565

22.5

Notes on Clock Synchronous Serial Interface ....................................................................................... 566

22.5.1

Notes on Clock Synchronous Serial I/O with Chip Select ............................................................... 566

22.5.2

Notes on I2C bus Interface ................................................................................................................ 566

22.6

Notes on Hardware LIN ........................................................................................................................ 567

22.7

Notes on A/D Converter ........................................................................................................................ 568

22.8

Notes on Flash Memory ........................................................................................................................ 569

22.8.1

CPU Rewrite Mode ........................................................................................................................... 569

22.9

Notes on Noise ...................................................................................................................................... 572

22.9.1

Inserting a Bypass Capacitor between VCC and VSS Pins as a Countermeasure against Noise and

Latch-up ............................................................................................................................................ 572

22.9.2

Countermeasures against Noise Error of Port Control Registers ..................................................... 572

23.

Notes on On-Chip Debugger ...................................................................................................... 573

24.

Notes on Emulator Debugger ..................................................................................................... 574

Appendix 1. Package Dimensions ........................................................................................................ 575

Appendix 2. Connection Examples between Serial Writer and On-Chip Debugging Emulator ............ 577

Appendix 3. Example of Oscillation Evaluation Circuit ......................................................................... 578

Index ..................................................................................................................................................... 579

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