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S1C6S2N7 TECHNICAL SOFTWARE EPSON II-45
CHAPTER 3: PERIPHERAL CIRCUITS (SVD Circuit and Heavy Load Protection Function)
The normal mode changes to the heavy load protection
mode in the following case:
• When the software changes the mode to the heavy
load protection mode (HLMOD = "1")
The heavy load protection mode switches the constant
voltage circuit of the LCD system to the high-stability
mode from the low current consumption mode.
Consequently, more current is consumed in the heavy
load protection mode than in the normal mode. Unless it
is necessary, be careful not to set the heavy load protec-
tion mode with the software.
Supply voltage
Criteria voltage
HLMOD register
Heavy load
protection mode
2 Hz clock
SVD circuit
SVDDT register
SVDON register
100 µs or more
Supply voltage
Criteria voltage
SVDON register
2 Hz clock
SVD circuit
SVDDT register
Heavy load
protection mode
HLMOD register
Fig. 3.8.3
Timing chart of heavy
load protection
function operation
through the SVDON
register
Fig. 3.8.2
Timing chart of
supply voltage
detection operation
through the HLMOD
register
- 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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