1.1 Precautions for External Bus ....................................................................................................................... 1

1.2 Precautions for PLL Frequency Synthesizer ................................................................................................ 2

1.3 Precautions for Power Control ..................................................................................................................... 3

1.4 Precautions for Protection ............................................................................................................................ 4

1.5 Precautions for Interrupts ............................................................................................................................. 5

1.5.1 Reading Address 00000

1.5.2 SP Setting ............................................................................................................................................ 5

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1.5.3 NMI Interrupt ........................................................................................................................................ 5

1.5.4 Changing the Interrupt Generate Factor .............................................................................................. 6

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1.5.5 INT Interrupt ......................................................................................................................................... 6

1.5.6 Rewrite the Interrupt Control Register ................................................................................................. 7

1.5.7 Watchdog Timer Interrupt .................................................................................................................... 7

1.6 Precautions for DMAC ................................................................................................................................. 8

1.6.1 Write to DMAE Bit in DMiCON Register (i = 0, 1) ................................................................................ 8

1.7 Precautions for Timers ................................................................................................................................. 9

1.7.1 Timer A ................................................................................................................................................. 9

1.7.2 Timer B ............................................................................................................................................... 12

1.8 Precautions for Serial I/O (Clock Synchronous Serial I/O Mode) .............................................................. 14

1.8.1 Transmission/reception ...................................................................................................................... 14

1.8.2 Transmission ...................................................................................................................................... 14

1.8.3 Reception ........................................................................................................................................... 14

1.9 Precaution for Serial I/O (Special Modes) .................................................................................................. 15

1.9.1 Special Mode 2 ................................................................................................................................. 15

1.9.2 Special Mode 4 (SIM Mode) ............................................................................................................. 15

1.10 Precautions for A-D Converter ................................................................................................................. 16

1.11 Precautions for CAN Module .................................................................................................................... 18

1.11.1 Reading C0STR Register ................................................................................................................. 18

1.11.2 CAN Transceiver in Boot Mode ........................................................................................................ 20

1.12 Precautions for Programmable I/O Ports ................................................................................................. 21

1.13 Precauitons for Electrical Characteristic Differences Between Mask ROM and Flash Memory Version Microcomputers ... 22

1.14 Precautions for Flash Memory Version .................................................................................................... 23

1.14.1 Precautions for Functions to Prevent Flash Memory from Rewriting ............................................... 23

1.14.2 Precautions for Stop Mode .............................................................................................................. 23

1.14.3 Precautions for Wait Mode ............................................................................................................... 23

1.14.4 Precautions for Low Power Dissipation Mode and Ring Oscillator Low Power Dissipation Mode ... 23

1.14.5 Writing command and data .............................................................................................................. 23

1.14.6 Precautions for Program Command ................................................................................................ 23

1.14.7 Precautions for Lock Bit Program Command ................................................................................... 23

1.14.8 Operation speed .............................................................................................................................. 24

1.14.9 Instructions to prevent from using .................................................................................................... 24

1.14.10 Interrupts ........................................................................................................................................ 24

1.14.11 How to access ................................................................................................................................ 24

1.14.12 Writing in user ROM area .............................................................................................................. 24

1.14.13 DMA transfer .................................................................................................................................. 24

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Table of Contents