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I-34 EPSON S1C6S2N7 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
I/O control register (0FCH D0)
The input or output I/O port mode can be set with this
register.
When 1 is written: Output mode
When 0 is written: Input mode
Reading: Valid
The input or output mode of the I/O port is set in units of
four bits. For instance, IOC sets the mode for P00–P03.
Writing 1 to the I/O control register makes the I/O port
enter the output mode, and writing 0, the input mode.
After an initial reset, the IOC register is set to 0, so the I/O
port is in the input mode.
IOC
- S1C6S2N7 1
- Technical Hardware 7
- CONTENTS 10
- Hardware 11
- INTRODUCTION 13
- CHAPTER 1 13
- Features 14
- Core CPU S1C6200A 15
- Pin Layout Diagram 16
- Pin Description 17
- Power Supply 18
- Fig. 2.1.2 19
- External elements when 19
- LCD system regulated 19
- Initial Reset 20
- Table 2.2.1 21
- Input port combinations 21
- Table 2.2.2 21
- Simultaneous high input 21
- Test Pin (TEST) 22
- CPU, ROM, RAM 23
- CHAPTER 3 23
- Fig. 3.2.1 24
- ROM configuration 24
- PERIPHERAL CIRCUITS 25
- AND OPERATION 25
- Table 4.1.1(a) I/O memory map 26
- Table 4.1.1(b) I/O memory map 27
- Table 4.1.1(c) I/O memory map 28
- Table 4.1.1(d) I/O memory map 29
- Table 4.1.1(e) I/O memory map 30
- Oscillation Circuit 31
- Input Ports (K00–K03) 32
- Data bus 33
- Mask option 34
- Control of input port 35
- Output Ports (R00–R03) 37
- EPSON I-27 39
- Control of output 40
- R00 register 41
- FOUT output 41
- R01 (R00) register 42
- BUZZER output 42
- I/O Ports (P00–P03) 43
- I/O control register 44
- Control of I/O port 44
- Configuration of LCD 47
- Frame frequency 48
- Fig. 4.6.2 49
- Drive waveform for 49
- 1/3 duty (1/3 bias) 49
- Fig. 4.6.3 50
- 1/2 duty (1/3 bias) 50
- LCD lighting status 51
- Fig. 4.6.7 53
- LCD static drive waveform 53
- Fig. 4.6.8 54
- Segment allocation 54
- EPSON I-43 55
- Fig. 4.6.9 56
- Clock Timer 57
- Frequency 58
- Register 58
- Control of clock 59
- Stopwatch Timer 61
- Count-up pattern 62
- Interrupt function 63
- Control of stopwatch 64
- EPSON I-53 65
- Configuration of SVD 67
- Operation of SVD 69
- Operation of heavy 70
- Control of SVD cir 71
- Stepping Motor Driver 73
- Drive pulse 74
- Control of motor 75
- Interrupt and HALT 77
- Interrupt flag 78
- Interrupt factors 79
- Specific masks and 80
- CPU system clock 81
- Control of interrupt 82
- EPSON I-71 83
- BASIC EXTERNAL WIRING DIAGRAM 84
- CHAPTER 5 84
- S1C6S2N7/6S2A7 85
- 6S2B7/6S2L7 85
- 6.1 Absolute Maximum Rating 86
- S1C6S2A7 87
- S1C6SL27 88
- S1C6S2B7 88
- 6.3 DC Characteristics 89
- EPSON I-79 91
- EPSON I-81 93
- EPSON I-83 95
- S1C6SL27/S1C6S2B7 97
- S1C6S2N7 (CR oscillation) 98
- S1C6S2A7 (CR oscillation) 98
- S1C6S2B7 (CR oscillation) 98
- Unless otherwise specified 99
- CD=built-in, Ta=25°C 99
- 7.1 Plastic Package 100
- QFP6-60pin 101
- 8.1 Diagram of Pad Layout 102
- 8.2 Pad Coordinates 103
- Technical Software 105
- Software 109
- S1C6S2N7 Block Diagram 111
- Program start address 112
- Interrupt vector area 112
- Program area 112
- Interrupt Vectors 113
- Data Memory Map 114
- EPSON II-5 115
- CHAPTER 1: CONFIGURATION 115
- EPSON II-9 119
- INITIAL RESET 120
- CHAPTER 2 120
- EPSON II-11 121
- CHAPTER 2: INITIAL RESET 121
- Initialize Program Example 122
- Enable interrupt 123
- Reset register flags 123
- Fig. 2.2.1 123
- Input Ports 124
- Control of 125
- Examples of input 125
- Disable interrupt 126
- Set address of port 126
- Output Ports3.2 127
- Examples of output 128
- EPSON II-19 129
- Special Use Output Ports3.3 130
- Control of the spe 131
- Examples of special 132
- EPSON II-23 133
- 3.4 I/O Ports 134
- Examples of I/O port 136
- EPSON II-27 137
- LCD Driver3.5 139
- Control of the LCD 140
- Fig. 3.5.3 141
- 7-segment LCD assignment 141
- Fig. 3.5.2 141
- 1/1 duty drive control 141
- (1/3 bias) 141
- Examples of 142
- LCD driver control 142
- D3 D2 D1 D0 143
- 3.6 Timer 144
- Control of the timer 145
- Examples of timer 146
- EPSON II-37 147
- 3.7 Stopwatch Timer 148
- Control of the stop 149
- Examples of stop 150
- B register 151
- A register 151
- SVD circuit and 152
- Control of the SVD 153
- Example of SVD 153
- Heavy load protec 154
- EPSON II-45 155
- Examples of heavy 156
- EPSON II-47 157
- Fig. 3.8.4 158
- Flowchart of operation 158
- 3.9 Motor Driver 159
- Control of the motor 160
- Examples of motor 160
- 3.10 Interrupt and Halt 161
- Control of interrupts 163
- Fig. 3.10.1 164
- Input interrupt circuit 164
- Fig. 3.10.2 165
- Timer interrupt circuit 165
- Fig. 3.10.3 166
- Stopwatch interrupt circuit 166
- Fig. 3.10.4 167
- Port K input 168
- Factor flag set Not set 168
- Mask register 168
- Active status 168
- EPSON II-59 169
- Fig. 3.10.6 170
- Assignment of the interrupt 170
- Table 3.10.2 171
- Interrupt vector map 171
- Fig. 3.10.7 172
- Internal interrupt circuit 172
- Examples of interrupt 173
- EPSON II-65 175
- CHAPTER 4 176
- SUMMARY OF PROGRAMMING 176
- EPSON II-69 179
- EPSON II-71 181
- Registers specified 183
- EPSON II-75 185
- EPSON II-77 187
- EPSON II-79 189
- Technical Manual 191
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