M16C30P_07 Datasheet, PDF (12/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

20.3 Standard Serial I/O Mode ...................................................................................................................... 232
20.3.1 ID Code Check Function .................................................................................................................. 232
20.3.2 Example of Circuit Application in the Standard Serial I/O Mode .................................................... 235
21. Electrical Characteristics ............................................................................................................ 237
22. Usage Precaution ....................................................................................................................... 267
22.1 SFR ........................................................................................................................................................ 267
22.1.1 Register Settings ............................................................................................................................... 267
22.2 Reset ...................................................................................................................................................... 268
22.3 Bus ......................................................................................................................................................... 269
22.4 Precautions for Power Control .............................................................................................................. 270
22.5 Precautions for Protect .......................................................................................................................... 271
22.6 Precautions for Interrupt ........................................................................................................................ 272
22.6.1 Reading address 00000h ................................................................................................................... 272
22.6.2 Setting the SP .................................................................................................................................... 272
22.6.3 The NMI Interrupt ............................................................................................................................. 272
22.6.4 Changing the Interrupt Generate Factor ........................................................................................... 273
22.6.5 INT Interrupt ..................................................................................................................................... 273
22.6.6 Rewrite the Interrupt Control Register ............................................................................................. 274
22.6.7 Watchdog Timer Interrupt ................................................................................................................ 274
22.7 Precautions for DMAC .......................................................................................................................... 275
22.7.1 Write to DMAE Bit in DMiCON Register ....................................................................................... 275
22.8 Precautions for Timers .......................................................................................................................... 276
22.8.1 Timer A ............................................................................................................................................. 276
22.8.2 Timer B ............................................................................................................................................. 278
22.9 Precautions for Serial interface ............................................................................................................. 279
22.9.1 Clock Synchronous Serial I/O .......................................................................................................... 279
22.9.2 UART ................................................................................................................................................ 280
22.10 A/D Converter ....................................................................................................................................... 281
22.11 Precautions for Programmable I/O Ports ............................................................................................... 283
22.12 Electric Characteristic Differences Between Mask ROM and Flash Memory Version Microcomputers 283
22.13 Mask ROM ............................................................................................................................................ 283
22.14 Flash Memory Version .......................................................................................................................... 284
22.14.1 Functions to Inhibit Rewriting Flash Memory Rewrite .................................................................... 284
22.14.2 Stop mode ......................................................................................................................................... 284
22.14.3 Wait mode ......................................................................................................................................... 284
22.14.4 Low power dissipation mode ............................................................................................................ 284
22.14.5 Writing command and data ............................................................................................................... 284
22.14.6 Program Command ........................................................................................................................... 284
22.14.7 Lock Bit Program Command ............................................................................................................ 284
22.14.8 Operation speed ................................................................................................................................ 285
22.14.9 Prohibited instructions ...................................................................................................................... 285
22.14.10 Interrupts ........................................................................................................................................... 285
22.14.11 How to access ................................................................................................................................... 285
22.14.12 Writing in the user ROM area ........................................................................................................... 285
22.14.13 DMA transfer .................................................................................................................................... 285
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