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A-5
20. Programmable I/O Ports ................................................................................................. 247
20.1 PDi Register ........................................................................................................................................... 248
20.2 Pi Register, PC14 Register .................................................................................................................... 248
20.3 PURj Register ........................................................................................................................................ 248
20.4 PCR Register .........................................................................................................................................248
21. Flash Memory Version .................................................................................................... 260
21.1 Memory Map ..........................................................................................................................................261
21.1.1 Boot Mode......................................................................................................................................262
21.2 Functions to Prevent Flash Memory from Rewriting .............................................................................. 262
21.2.1 ROM Code Protect Function ..........................................................................................................262
21.2.2 ID Code Check Function ................................................................................................................262
21.3 CPU Rewrite Mode ................................................................................................................................ 264
21.3.1 EW0 Mode ..................................................................................................................................... 265
21.3.2 EW1 Mode ..................................................................................................................................... 265
21.3.3 FMR0, FMR1 Registers ................................................................................................................. 266
21.3.4 Precautions on CPU Rewrite Mode ............................................................................................... 271
21.3.5 Software Commands .....................................................................................................................273
21.3.6 Data Protect Function .................................................................................................................... 278
21.3.7 Status Register (SRD Register) ..................................................................................................... 278
21.3.8 Full Status Check ...........................................................................................................................280
21.4 Standard Serial I/O Mode ......................................................................................................................282
21.4.1 ID Code Check Function ................................................................................................................282
21.4.2 Example of Circuit Application in Standard Serial I/O Mode .......................................................... 286
21.5 Parallel I/O Mode ................................................................................................................................... 287
21.5.1 User ROM and Boot ROM Areas ................................................................................................... 287
21.5.2 ROM Code Protect Function ..........................................................................................................287
21.6 CAN I/O Mode ........................................................................................................................................288
21.6.1 ID Code Check Function ................................................................................................................288
21.6.2 Example of Circuit Application in CAN I/O Mode ........................................................................... 291
22. Electrical Characteristics ................................................................................................. 292
22.1 Electrical Characteristics (Normal-ver.).................................................................................................. 292
22.2 Electrical Characteristics (T/V-ver.) ........................................................................................................ 328
23. Usage Precaution............................................................................................................ 338
23.1 SFR ........................................................................................................................................................ 338
23.1 External Bus........................................................................................................................................... 339
23.3 External Clock ........................................................................................................................................ 340
23.4 PLL Frequency Synthesizer ................................................................................................................... 341
23.5 Power Control ........................................................................................................................................ 342
23.6 Oscillation Stop, Re-oscillation Detection Function ............................................................................... 344
23.7 Protection ............................................................................................................................................... 345
23.8 Interrupt.................................................................................................................................................. 346
23.8.1 Reading Address 00000h............................................................................................................... 346
23.8.2 Setting SP ...................................................................................................................................... 346
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23.8.3 NMI Interrupt .................................................................................................................................. 346
23.8.4 Changing Interrupt Generate Factor .............................................................................................. 347
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23.8.5 INT Interrupt ...................................................................................................................................347
23.8.6 Rewrite Interrupt Control Register ................................................................................................. 348
23.8.7 Watchdog Timer Interrupt .............................................................................................................. 348