Appendix 4
Appendix
4-31
32180 Group User's Manual (Rev. 1.0)
SUMMARY OF PRECAUTIONS
Appendix 4.13.5 Processing Input/Output Ports
For input/output ports, take the appropriate measures in both hardware and software following the procedure
described below.
Hardware measures
• Insert resistors of 100
Ω
or more in series to the input/output ports.
Software measures
• For input ports, read out data in a program two or more times to verify that the levels coincide.
• For output ports, rewrite the data register at certain intervals because there is a possibility of the output data
being inverted by noise.
• Rewrite the direction register at certain intervals.
Figure 4.13.11 Example Processing of Input/Output Ports
Noise
Direction register
Data register
Data bus
Input/output port
Noise
Appendix 4.13 Precautions about Noise
Summary of Contents for M32R/ECU Series
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Page 712: ...CHAPTER 18 OSCILLATOR CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit...
Page 794: ...CHAPTER 22 TYPICAL CHARACTERISTICS...
Page 796: ...APPENDIX 1 MECHANICAL SPECIFICAITONS Appendix 1 1 Dimensional Outline Drawing...
Page 798: ...APPENDIX 2 INSTRUCTION PROCESSING TIME Appendix 2 1 32180 Instruction Processing Time...
Page 802: ...APPENDIX 3 PROCESSING OF UNUSED PINS Appendix 3 1 Example Processing of Unused Pins...
