Renesas M16C/64C User Manual page 24

31.3.2 Timing Requirements (Peripheral Functions and Others) ............................................... 743
31.3.3 Timing Requirements (Memory Expansion Mode and Microprocessor Mode) ................ 749
31.3.4 Switching Characteristics (Memory Expansion Mode and Microprocessor Mode) .......... 751
32. Usage Notes ............................................................................................................ 758
32.1 Notes on Noise ......................................................................................................................... 758
32.2 Notes on SFRs ......................................................................................................................... 759
32.2.1 Register Settings ............................................................................................................. 759
32.3 Notes on Protection .................................................................................................................. 761
32.4 Notes on Resets ....................................................................................................................... 762
32.4.1 Power Supply Rising Gradient ......................................................................................... 762
32.4.2 Power-On Reset .............................................................................................................. 762
32.4.3 OSDR Bit (Oscillation Stop Detect Reset Detect Flag) .................................................... 763
32.5 Notes on Clock Generator ........................................................................................................ 764
32.5.1 Oscillator Using a Crystal or a Ceramic Resonator ......................................................... 764
32.5.2 Noise Countermeasure .................................................................................................... 765
32.5.3 CPU Clock ....................................................................................................................... 766
32.5.4 Oscillator Stop/Restart Detect Function ........................................................................... 766
32.5.5 PLL Frequency Synthesizer ............................................................................................ 767
32.6 Notes on Power Control............................................................................................................ 768
32.6.1 CPU Clock ....................................................................................................................... 768
32.6.2 Wait Mode ....................................................................................................................... 768
32.6.3 Stop Mode ....................................................................................................................... 768
32.6.4 Low Current Consumption Read Mode ........................................................................... 769
32.6.5 Slow Read Mode ............................................................................................................. 769
32.7 Notes on Bus ........................................................................................................................... 770
32.7.1 Reading Data Flash ......................................................................................................... 770
32.7.2 External Bus .................................................................................................................... 770
32.7.3 External Access Immediately after Writing to the SFRs .................................................. 770
HOLD ............................................................................................................................... 770
32.7.4
32.8 Notes on Programmable I/O Ports............................................................................................ 771
Influence of SD ................................................................................................................ 771
32.8.1
32.8.2 Influence of SI/O3 and SI/O4 ........................................................................................... 771
32.9 Notes on Interrupts ................................................................................................................... 772
32.9.1 Reading Address 00000h ................................................................................................ 772
32.9.2 SP Setting ........................................................................................................................ 772
NMI Interrupt .................................................................................................................... 772
32.9.3
32.9.4 Changing an Interrupt Source ......................................................................................... 773
32.9.5 Rewriting the Interrupt Control Register .......................................................................... 774
32.9.6 Instruction to Rewrite the Interrupt Control Register ....................................................... 774
INT Interrupt .................................................................................................................... 775
32.9.7
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