Appendix 3
Appendix 3-6
Ver.0.10
PRECAUTIONS ABOUT NOISE
Appendix 3.1 Precautions about Noise
Appendix 3.1.4 Consideration about the Oscillator
The oscillator that generates the fundamental clock for microcomputer operation requires
consideration to make it less susceptible to influences from other signals.
(1) Avoidance from large-current signal lines
Signal lines in which a large current flows exceeding the range of current values that the
microcomputer can handle must be routed as far away from the microcomputer (especially the
oscillator) as possible.
<Reasons>
Systems using the microcomputer contain signal lines to control, for example, a motor, LED,
and thermal head. When a large current flows in these signal lines, it generates noise due to
mutual inductance.
Figure 3.1.6 Wiring of Large-current Signal Lines
XIN
XOUT
VSS
M
Mutual inductance
Large current
GND
Microcomputer
Summary of Contents for M32170F3VFP
Page 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Page 56: ...2 2 14 Ver 0 10 This is a blank page ...
Page 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Page 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Page 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Page 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Page 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Page 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...