A - 6

20.5

Standard Serial I/O Mode ...................................................................................................................... 518

20.5.1

ID Code Check Function .................................................................................................................. 518

20.6

Parallel I/O Mode .................................................................................................................................. 522

20.6.1

ROM Code Protect Function ............................................................................................................ 522

20.7

Notes on Flash Memory ........................................................................................................................ 523

20.7.1

CPU Rewrite Mode ........................................................................................................................... 523

21.

Electrical Characteristics ............................................................................................................ 526

22.

Usage Notes ............................................................................................................................... 551

22.1

Notes on Clock Generation Circuit ....................................................................................................... 551

22.1.1

Stop Mode ......................................................................................................................................... 551

22.1.2

Wait Mode ........................................................................................................................................ 551

22.1.3

Oscillation Stop Detection Function ................................................................................................. 551

22.1.4

Oscillation Circuit Constants ............................................................................................................ 551

22.2

Notes on Interrupts ................................................................................................................................ 552

22.2.1

Reading Address 00000h .................................................................................................................. 552

22.2.2

SP Setting .......................................................................................................................................... 552

22.2.3

External Interrupt and Key Input Interrupt ....................................................................................... 552

22.2.4

Changing Interrupt Sources .............................................................................................................. 553

22.2.5

Changing Interrupt Control Register Contents ................................................................................. 554

22.3

Notes on Timers .................................................................................................................................... 555

22.3.1

Notes on Timer RA ........................................................................................................................... 555

22.3.2

Notes on Timer RB ........................................................................................................................... 556

22.3.3

Notes on Timer RC ........................................................................................................................... 560

22.3.4

Notes on Timer RD ........................................................................................................................... 561

22.3.5

Notes on Timer RE ........................................................................................................................... 567

22.3.6

Notes on Timer RF ........................................................................................................................... 570

22.4

Notes on Serial Interface ....................................................................................................................... 571

22.5

Notes on Clock Synchronous Serial Interface ....................................................................................... 572

22.5.1

Notes on Clock Synchronous Serial I/O with Chip Select ............................................................... 572

22.5.2

Notes on I2C bus Interface ................................................................................................................ 572

22.6

Notes on Hardware LIN ........................................................................................................................ 573

22.7

Notes on A/D Converter ........................................................................................................................ 574

22.8

Notes on Flash Memory ........................................................................................................................ 575

22.8.1

CPU Rewrite Mode ........................................................................................................................... 575

22.9

Notes on Noise ...................................................................................................................................... 578

22.9.1

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

Latch-up ............................................................................................................................................ 578

22.9.2

Countermeasures against Noise Error of Port Control Registers ..................................................... 578

23.

Notes on On-Chip Debugger ...................................................................................................... 579

24.

Notes on Emulator Debugger ..................................................................................................... 580

Appendix 1. Package Dimensions ........................................................................................................ 581

Appendix 2. Connection Examples between Serial Writer and On-Chip Debugging Emulator ............ 582