M38203M4 Datasheet, PDF (9/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

Table of contents
2.10 Reset ..................................................................................................................................2-185
2.10.1 Explanation of operations .......................................................................................... 2-185
2.10.2 Internal state of the microcomputer immediately after reset release ......................... 2-187
2.10.3 Reset circuit ...............................................................................................................2-188
2.10.4 Notes on the RESET pin ........................................................................................... 2-189
2.11 Oscillation circuit ............................................................................................................. 2-190
2.11.1 Oscillation circuit........................................................................................................2-190
2.11.2 Internal clock φ ..........................................................................................................2-192
2.11.3 Oscillating operation ..................................................................................................2-194
2.11.4 Oscillation stabilizing time ......................................................................................... 2-197
CHAPTER 3. APPENDIX
3.1 Built-in PROM version .......................................................................................................... 3-2
3.1.1 Product expansion ........................................................................................................... 3-3
3.1.2 Performance overview ..................................................................................................... 3-4
3.1.3 Pin configuration ..............................................................................................................3-5
3.1.4 Functional block diagram ................................................................................................ 3-8
3.1.5 Notes on use ...................................................................................................................3-9
3.2 Countermeasures against noise ....................................................................................... 3-11
3.2.1 Shortest wiring length .................................................................................................... 3-11
3.2.2 Connection of a bypass capacitor across the VSS line and the VCC line ....................... 3-12
3.2.3 Oscillator concerns ........................................................................................................ 3-13
3.2.4 Installing an oscillator away from signal lines where potential levels change frequently............................ 3-14
3.2.5 Oscillator protection using VSS pattern .......................................................................... 3-14
3.2.6 Set up for I/O ports ........................................................................................................ 3-14
3.2.7 Providing of watchdog timer function by software ......................................................... 3-15
3.3 Control registers ..................................................................................................................3-16
3.4 List of instruction codes ................................................................................................... 3-29
3.5 Machine instructions ........................................................................................................... 3-30
3.6 Mask ROM ordering method ............................................................................................. 3-40
3.7 Mark specification form ..................................................................................................... 3-52
3.8 Package outlines ................................................................................................................. 3-54
3.9 SFR allocation ...................................................................................................................... 3-56
3.10 Pin configuration ............................................................................................................... 3-57
3820 GROUP USER’S MANUAL
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