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II-16 EPSON S1C62N82 TECHNICAL SOFTWARE
CHAPTER 3: PERIPHERAL CIRCUITS (Oscillation Circuit)
PERIPHERAL CIRCUITS
Details on how to control the S1C62N82 peripheral circuit is
given in this chapter.
Oscillation Circuit
S1C62N82 has two built-in oscillation circuits (OSC1 and
OSC3).
When processing of S1C62A82 requires high-speed opera-
tions, the CPU's operating clock should be switched from
OSC1 to OSC3.
CHAPTER 3
3.1
Oscillation circuit
memory map
Table 3.1.1 I/O memory map
Address Comment
Register
D3 D2 D1 D0 Name SR 1 0
0FCH
CLKCHG OSCC 0 IOC CLKCHG
OSCC
0
IOC
0
0
0
CPU clock switch
OSC3 oscillator ON/OFF
I/O port P00–P03 Input/Output
OSC3
ON
Output
OSC1
OFF
Input
R/WR/W R
*5
*1 Initial value following initial reset
*2 Not set in the circuit
*3 Undefined
*4 Reset (0) immediately after being read
*5 Always 0 when being read
*6 Refer to main manual
- S1C62N82 1
- Technical Hardware 7
- CONTENTS 10
- Hardware 11
- INTRODUCTION 13
- CHAPTER 1 13
- Features 14
- EPSON I-3 15
- CHAPTER 1: INTRODUCTION 15
- Core CPU S1C6200A 16
- Pin Layout Diagram 17
- Fig. 1.4.2 18
- Pin assignment 18
- Pin Description 19
- Power Supply 20
- Initial Reset 21
- Table 2.2.1 22
- Input port combinations 22
- Test Pin (TEST) 23
- CPU, ROM, RAM 24
- Fig. 3.2.1 25
- ROM configuration 25
- Memory Map 26
- EPSON I-15 27
- EPSON I-19 31
- EPSON I-21 33
- Oscillation Circuit 34
- OSC3 oscillation 35
- Configuration of 36
- Control of oscillation 37
- Input Ports (K00–K03, K10) 39
- Input comparison 40
- EPSON I-29 41
- Mask option 43
- Control of input ports 44
- EPSON I-35 47
- Control of output 51
- R10 Register 52
- FOUT output 52
- I/O Ports (P00–P03) 53
- Control of I/O port 54
- EPSON I-43 55
- LCD Driver 57
- Frame frequency 58
- Fig. 4.6.5 61
- Segment allocation 61
- Fig. 4.6.6 63
- Clock Timer 65
- Frequency 66
- Control of clock 67
- EPSON I-57 69
- Stopwatch Timer 70
- Count-up pattern 71
- Interrupt function 72
- Control of stopwatch 73
- EPSON I-63 75
- Configuration of SVD 76
- Operation of SVD 78
- Operation of heavy 79
- Control of SVD cir 80
- EPSON I-69 81
- Analog Voltage Comparator 82
- Operation of analog 83
- Control of analog 84
- 4.11 Melody Generator 85
- Fig. 4.11.1 87
- Melody generator 87
- Fig. 4.11.2 88
- Frequency booster 88
- Fig. 4.11.4 90
- Address register 90
- Fig. 4.11.5 91
- Address counters 91
- Table 4.11.1 92
- Dividing ratio 92
- Fig. 4.11.6 92
- Table 4.11.2 93
- Counter setting and tempo 93
- Table 4.11.3 93
- Tempo and switch setting 93
- TS3TS2TS1TS0 94
- EPSON I-83 95
- Table 4.11.5 (b) 97
- Scale ROM data and interval 97
- (without frequency booster) 97
- Data bus 100
- (with external 101
- EPSON I-91 103
- Melody data 104
- Table 4.11.6 105
- Note data and notes 105
- Playing of silent note 107
- Envelope function 108
- Attack signal 109
- R12 pin output 109
- Melody signal 109
- MO pin output 109
- Playing tempo 110
- Table 4.11.8 111
- Playing speed 111
- Playing mode 112
- EPSON I-101 113
- Fig. 4.11.18 114
- Level hold mode 114
- Fig. 4.11.19 115
- Retrigger mode 115
- Control of the 116
- EPSON I-105 117
- Table 4.11.10 118
- EPSON I-107 119
- Interrupt and HALT 120
- Interrupt flag 121
- Interrupt factors 122
- Specific masks and 123
- Interrupt vectors and 124
- Control of interrupt 125
- EPSON I-115 127
- BASIC EXTERNAL WIRING DIA 129
- CHAPTER 5 129
- S1C62L82 130
- S1C62A82 130
- (3) Envelope Driving 131
- (4) Envelope Driving 132
- 6.1 Absolute Maximum Rating 133
- 6.3 DC Characteristics 135
- Analog comparator 137
- EPSON I-131 143
- CHAPTER 7 PACKAGE 145
- CHAPTER 7: PACKAGE 146
- EPSON I-135 147
- CHAPTER 8 PAD LAYOUT 148
- 8.2 Pad Coordinates 149
- Technical Software 151
- Software 155
- CONFIGURATION 157
- Fig. 1.2.1 158
- Configuration of built-in ROM 158
- 1.3 Interrupt Vectors 159
- Data Memory Map 160
- EPSON II-5 161
- CHAPTER 1: CONFIGURATION 161
- EPSON II-9 165
- EPSON II-11 167
- INITIAL RESET 168
- CHAPTER 2 168
- EPSON II-13 169
- CHAPTER 2: INITIAL RESET 169
- Initialize Program Example 170
- Fig. 2.2.1 171
- PERIPHERAL CIRCUITS 172
- CHAPTER 3 172
- Examples of oscilla 173
- Switch the CPU clock to OSC1 174
- Set OSC3 to OFF 174
- Return to parent routine 174
- Input Ports3.2 175
- Control of 176
- Examples of input 177
- Output Ports3.3 178
- Examples of output 179
- Special Use Output Ports3.4 180
- Control of the spe 181
- Example of special 182
- 3.5 I/O Ports 183
- Examples of I/O port 184
- A register 185
- LCD Driver3.6 187
- Control of the LCD 188
- Register 189
- Examples of 190
- LCD driver control 190
- D3 D2 D1 D0 191
- Set address of display memory 193
- Display of underline 193
- Fig. 3.6.7 194
- Example of dot matrix LCD 194
- 3.7 Timer 195
- Control of the timer 196
- Examples of timer 197
- 3.8 Stopwatch Timer 199
- Control of the stop 200
- Examples of stop 201
- SWH3 SWH2 SWH1 SWH0 202
- B register 202
- SWL3 SWL2 SWL1 SWL0 202
- SVD circuit and 203
- Control of the SVD 204
- Example of SVD 204
- Heavy load protec 205
- Examples of heavy 207
- Fig. 3.9.4 209
- Flow chart of operation 209
- 3.10 Analog Comparator 210
- Example of CMP 211
- 3.11 Melody Generator 212
- Address setting 213
- (Addresses 0F0H and 213
- Play mode control 213
- Fig. 3.11.2 214
- Control procedure of 214
- (2) Level hold 215
- Fig. 3.11.4 216
- Fig. 3.11.5 217
- Control procedure of tempo 217
- Fig. 3.11.6 219
- Control procedure of play 219
- Melody interrupt 220
- Melody ROM 220
- Table 3.11.4 221
- Note data 221
- Fig. 3.11.8 221
- Waveform of envelope 221
- Scale ROM 222
- EPSON II-67 223
- EPSON II-69 225
- 3.12 Interrupt and Halt 226
- EPSON II-71 227
- Control of interrupts 229
- Fig. 3.12.1 230
- Fig. 3.12.2 231
- K10 input interrupt circuit 231
- Fig. 3.12.3 232
- Timer interrupt circuit 232
- Fig. 3.12.4 233
- Stopwatch interrupt 233
- EPSON II-79 235
- EPSON II-81 237
- Interrupt 238
- Vector Address 238
- Priority 238
- EPSON II-83 239
- Fig. 3.12.6 240
- Internal interrupt circuit 240
- Examples of interrupt 241
- EPSON II-87 243
- EPSON II-89 245
- EPSON II-91 247
- EPSON II-93 249
- EPSON II-95 251
- Registers specified 253
- EPSON II-99 255
- EPSON II-101 257
- EPSON II-103 259
- Source File Name 260
- Statement (line) 260
- 1 2 3 4 5 6 7 8 261
- APPENDIX F Dividing Table 262
- EPSON II-107 263
- APPENDIX F: DIVIDING TABLE 263
- APPENDIX G RAM Map 264
- EPSON II-109 265
- APPENDIX G: RAM MAP 265
- Epson IS energy savings 267
- First issue November, 1991 268
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