Renesas M16C/64A Series User Manual page 24

31.3.4 Switching Characteristics (Memory Expansion Mode and Microprocessor Mode) ......... 741
32. Usage Notes ............................................................................................................ 748
32.1 Notes on Noise ......................................................................................................................... 748
32.2 Notes on SFRs ......................................................................................................................... 749
32.2.1 Register Settings ............................................................................................................. 749
32.3 Notes on Protection .................................................................................................................. 751
32.4 Notes on Resets ....................................................................................................................... 752
32.4.1 Power Supply Rising Gradient ........................................................................................ 752
32.4.2 Power-On Reset .............................................................................................................. 752
32.4.3 OSDR Bit (Oscillation Stop Detect Reset Detect Flag) ................................................... 753
32.4.4 Hardware Reset when VCC1 < Vdet0 ............................................................................. 753
32.5 Notes on Clock Generator ........................................................................................................ 754
32.5.1 Oscillator Using a Crystal or a Ceramic Resonator ......................................................... 754
32.5.2 Noise Countermeasure ................................................................................................... 755
32.5.3 CPU Clock ....................................................................................................................... 756
32.5.4 Oscillator Stop/Restart Detect Function .......................................................................... 756
32.5.5 PLL Frequency Synthesizer ............................................................................................ 757
32.5.6 Starting PLL Clock Oscillation ......................................................................................... 758
32.6 Notes on Power Control............................................................................................................ 759
32.6.1 CPU Clock ....................................................................................................................... 759
32.6.2 Wait Mode ....................................................................................................................... 759
32.6.3 Stop Mode ....................................................................................................................... 759
32.6.4 Low Current Consumption Read Mode ........................................................................... 760
32.6.5 Slow Read Mode ............................................................................................................. 760
32.7 Notes on Bus ........................................................................................................................... 761
32.7.1 Reading Data Flash ......................................................................................................... 761
32.7.2 External Bus .................................................................................................................... 761
32.7.3 External Access Immediately after Writing to the SFRs .................................................. 761
HOLD .............................................................................................................................. 761
32.7.4
32.8 Notes on Programmable I/O Ports............................................................................................ 762
Influence of SD ................................................................................................................ 762
32.8.1
32.8.2 Influence of SI/O3 and SI/O4 .......................................................................................... 762
32.9 Notes on Interrupts ................................................................................................................... 763
32.9.1 Reading Address 00000h ................................................................................................ 763
32.9.2 SP Setting ....................................................................................................................... 763
NMI Interrupt ................................................................................................................... 763
32.9.3
32.9.4 Changing an Interrupt Source ......................................................................................... 764
32.9.5 Rewriting the Interrupt Control Register .......................................................................... 765
32.9.6 Instruction to Rewrite the Interrupt Control Register ....................................................... 765
INT Interrupt .................................................................................................................... 766
32.9.7
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