Epson SED1278F/D Especificações Página 24
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EPSON 2–17
SED1200 Series
SED1200
Series
APPLICATION NOTES
Display Oscillator
The SED1200 has an internal oscillator to generate the
timing signals required for the LCD display.
If the internal oscillator is used, connect the feedback
resistor Rf as shown in figure 3. The feedback resistor
leads must be kept as short as possible to reduce stray
capacitance and the possibility of crosstalk between the
oscillator and adjoining signals.
If an external clock is used, connect it to OSC1, as shown
in figure 4.
The relationship between the oscillator frequency and
the LCD drive frame frequency is
f
FR = fOSC/1600
For example if fOSC = 100 kHz, fFR = 62.5 Hz
R
f
OSC1 OSC2
Figure 3. Using the Internal Oscillator
OSC1 OSC2
External clock
Figure 4. Using an External Clock
- SED1200 Series 1
- CONTENTS 3
- Selection Guide 4
- LCD controller-drivers for 5
- EPSON 2–3 10
- PIN DESCRIPTION 12
- COMMAND DESCRIPTION 12
- Write Commands 13
- SPECIFICATIONS 14
- Electrical Specifications 15
- EPSON 2–9 16
- EPSON 2–11 18
- OPERATION 20
- Loading CGRAM 21
- EPSON 2–15 22
- Mechanical Specifications 22
- SS –2778 –857 23
- LCD –2778 –1048 23
- DD –2778 –1238 23
- OSC1 OSC2 24
- Command Clock (Φ) 25
- LCD Drive Waveforms 25
- EPSON 2–19 26
- EPSON 2–21 28
- LCD Display Interface 28
- CPU Interface 29
- EPSON 2–23 30
- CGRAM AREA 32
- 5 x 8 DOTS 32
- SED1200F0B/SED1200D0B 33
- EPSON 2–27 34
- EPSON 2–29 36
- EPSON 3–3 41
- EPSON 3–5 43
- EPSON 3–7 45
- 3–8 EPSON 46
- VDD = 3 V 46
- EPSON 3–9 47
- EPSON 3–11 49
- APPLICATION NOTES 54
- 3–18 EPSON 56
- EPSON 3–19 57
- 3–20 EPSON 58
- • 8 Characters/2 line 58
- • 20 Characters/2 lines 58
- • Interface with 8-bit CPU 59
- 3–22 EPSON 60
- Lower 4 bit (D 61
- EPSON 3–25 63
- CHIP SPECIFICATION 68
- . . . . . . . . 69
- EPSON 4–7 72
- <SED1222D 72
- EPSON 4–9 74
- <SED122AD 74
- DD or VSS 77
- EPSON 4–13 78
- EPSON 4–15 80
- EPSON 4–17 82
- When voltage is doubled 83
- When voltage is tripled 83
- (C, B) (0, 0) (1, 0) (1, 1) 86
- EPSON 4–23 88
- EPSON 4–25 90
- SED1220DA 90
- SED1220DB 91
- EPSON 4–27 92
- SED1220DG 92
- EPSON 4–29 94
- *: Blank 95
- 1: Display or blink on 95
- 0: Display or blink off 95
- : 1–2 Hz 95
- EPSON 4–33 98
- EPSON 4–35 100
- EPSON 4–37 102
- 80 Series MPU 102
- 68 Series MPU 102
- Serial Interface 102
- 4–38 EPSON 103
- . . . . . . . . . . . . . . 104
- 4–40 EPSON 105
- EPSON 4–41 106
- 4–42 EPSON 107
- Instruction Setup Example 108
- (Reference Only) 108
- 4–44 EPSON 109
- SED1220D 110
- CHIP:REVERSE 110
- 80series MPU 110
- DD–VSS Power ON 111
- EPSON 4–47 112
- EPSON 4–49 114
- Option List 115
- SED1225 Series 116
- LCD Controller/Drivers 116
- Technical Manual 116
- Contents 117
- FEATURES 118
- BLOCK DIAGRAM 119
- . . . . . . . . . . . . 120
- EPSON 5–5 122
- DD or VSS if PS=low 124
- LCD Driver Signals 125
- FUNCTION DESCRIPTION 126
- Power Circuit 127
- Reset Circuit 129
- . . . . . 130
- . . . . 131
- BUILT-IN MEMORIES 134
- EPSON 5–19 136
- EPSON 5–21 138
- Symbol Register 139
- EPSON 5–23 140
- Static Icon RAM 140
- (VCC) VDD 142
- (GND) VSS 142
- DC CHARACTERISTICS 143
- EPSON 5–27 144
- SIGNAL TIMING CHARACTERISTICS 145
- EPSON 5–29 146
- MPU INTERFACES (REFERENCE) 148
- LCD CELL INTERFACE 149
- EPSON 5–33 150
- EPSON 5–35 152
- Initialization 152
- Display Mode 153
- Standby Mode 153
- EPSON 5–37 154
- Sleep Mode 154
- OSC fOSC 4 × fOSC 155
- CAUTIONS 156
- SED1230 Series 157
- OVERVIEW 159
- EPSON 6–3 161
- <SED1230D 162
- EPSON 6–5 163
- <SED1231D 164
- EPSON 6–7 165
- <SED1232D 166
- EPSON 6–9 167
- <SED1233D 168
- EPSON 6–11 169
- DESCRIPTION OF PINS 170
- EPSON 6–13 171
- FUNCTIONAL DESCRIPTION 173
- EPSON 6–17 175
- EPSON 6–19 177
- Low Power Consumption Mode 178
- COMMANDS 179
- EPSON 6–23 181
- CHARACTER GENERATOR 183
- EPSON 6–27 185
- EPSON 6–29 187
- EPSON 6–31 189
- ABSOLUTE MAXIMUM RATINGS 190
- TIMING CHARACTERISTICS 193
- D0 to D7 194
- EPSON 6–37 195
- EPSON 6–39 197
- ■ System Setup 197
- EPSON 6–41 199
- SED1234/35 Series 201
- ✽A, SED123✽D✽C 203
- · · · · · · · · · · · 205
- · · · · · · 205
- <SED1234D 206
- > (1/2) 206
- EPSON 7–5 207
- > (2/2) 207
- <SED1235D 208
- EPSON 7–7 209
- EPSON 7–9 211
- EPSON 7–13 215
- Under a triple boosting 217
- Data Writing 221
- One Line Completed? 221
- RAM Address Set 221
- EPSON 7–23 225
- EPSON 7–25 227
- EPSON 7–29 231
- EPSON 7–31 233
- EPSON 7–35 237
- EPSON 7–37 239
- SED1240 Series 240
- Input bufferMPU interface 243
- LCD power circuit 243
- EPSON 8–5 246
- EPSON 8–7 248
- EPSON 8–9 250
- EPSON 8–11 252
- System Bus Connecting Pins 252
- DESCRIPTION OF FUNCTIONS 254
- EPSON 8–15 256
- EPSON 8–17 258
- EPSON 8–21 262
- DESCRIPTION OF COMMANDS 263
- EPSON 8–23 264
- EPSON 8–25 266
- EPSON 8–27 268
- EPSON 8–29 270
- [Standard display] 271
- EPSON 8–31 272
- EPSON 8–33 274
- EPSON 8–35 276
- EPSON 8–39 280
- EPSON 8–41 282
- EPSON 8–43 284
- EPSON 8–45 286
- EPSON 8–47 288
- Symbol Register RAM 289
- EPSON 8–49 290
- AC CHARACTERISTICS 296
- EPSON 8–57 298
- EPSON 8–59 300
- • •• • • 302
- (Reference) 304
- OPTIONS LIST 306
- CHIP TOP VIEW 307
- (Mold, marking area) 308
- PACKAGE OUTLINE 312
- SED1278D 313
- TERMINAL CONFIGURATION 315
- Applicable terminal 316
- · DBO to DB7 316
- Internal 316
- EPSON 9–7 317
- Write Only Instructions 317
- EPSON 9–9 319
- Read Only Instructions 319
- EPSON 9–11 321
- EPSON 9–13 323
- LCD Drive Voltages 323
- EPSON 9–15 325
- EPSON 9–17 327
- 9–18 EPSON 328
- EPSON 9–19 329
- 9–20 EPSON 330
- THE CHARACTER GENERATOR 331
- 3 to a0, specify the row 332
- 7, is ignored 332
- LCD INTERFACE 333
- · · · · · · 334
- 335
- · · · ·· · 336
- · · · ·· · · ·· · 337
- SED1181FLA 338
- · · · ·· · · ·· · · 339
- MPU INTERFACE 340
- EPSON 9–31 341
- SED1278F0A/SED1278D0A 342
- EPSON 9–33 343
- SED1278F0B/SED1278D0B 343
- SED1278F0C/SED1278D0C 344
- EPSON 9–35 345
- SED1278F0E/SED1278D0E 345
- SED1278F0G/SED1278D0G 346
- EPSON 9–37 347
- SED1278F0H/SED1278D0H 347
- APPENDIX B: PIN CONSTRUCTION 348
- EPSON 9–39 349
- Output Pin 349
- Dot-Matrix LCD Controller 350
- 10–4 EPSON 355
- Latch-up endurance 355
- Static breakdown resistance 355
- Transmission start 358
- 10–8 EPSON 359
- EPSON 10–9 360
- EPSON 10–11 362
- System Registers 362
- Note: × = don’t care 363
- EPSON 10–13 364
- Key Scanning 364
- Expanded Input Ports 364
- LED Controller 364
- DESIGN INFORMATION 365
- SED1280F 366
- 10–16 EPSON 367
- EPSON 10–17 368
- LED Matrix Connections 368
- Key Switch Matrix Connections 368
- Epson IS energy savings 370
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