Page 1
S6B0724
written permission of LCD Driver IC Team.
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
Contents in this document are subject to change without notice. No part of this document may be reproduced
or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express
June. 2000.
Ver. 0.9
Prepared by: Kyutae, Lim
Kyetae@samsung.co.kr
Page 2
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
S6B0724 Specification Revision History
Version Content Date
0.0 Initial version Mar.1999
0.1
PAD name change (VSS → TEST4)
Mar.1999
0.2 Eq2. changed (page 32) Mar.1999
0.3 Figure 10. Figure 11. Changed Mar.1999
0.4 Set Static Indicator Register changed (page 46) Apr.1999
0.5 PAD location added Apr.1999
Modify following sections
0.6
Introduction, Features, Pad Configuration, Pin Description,
Power Supply Circuits, Reference Circuit Examples,
Apr.1999
DC/AC Characteristics, Connection Between S6B0724 and LCD Panel
0.7
0.8
0.9
Pin name changed at page 8 (FRI → FR)
Operating VDD is changed
Read timing is changed(Figure 5)
May.1999
Oct.1999
Jun.2000
2
Page 3
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
CO
NTENTS
INTRODUCTION ..................................................................................................................................................1
FEATURES..........................................................................................................................................................1
BLOCK DIAGRAM...............................................................................................................................................3
PAD CONFIGURATION .......................................................................................................................................4
PAD CENTER COORDINATES ............................................................................................................................5
PIN DESCRIPTION ..............................................................................................................................................8
POWER SUPPLY ..........................................................................................................................................8
LCD DRIVER SUPPLY..................................................................................................................................8
SYSTEM CONTROL .....................................................................................................................................9
MICROPROCESSOR INTERFACE.............................................................................................................11
LCD DRIVER OUTPUTS.............................................................................................................................13
FUNCTIONAL DESCRIPTION............................................................................................................................ 14
MICROPROCESSOR INTERFACE.............................................................................................................14
DISPLAY DATA RAM (DDRAM)..................................................................................................................17
LCD DISPLAY CIRCUITS............................................................................................................................20
LCD DRIVER CIRCUIT ...............................................................................................................................22
POWER SUPPLY CIRCUITS ......................................................................................................................23
REFERENCE CIRCUIT EXAMPLES ...........................................................................................................30
RESET CIRCUIT.........................................................................................................................................32
INSTRUCTION DESCRIPTION...........................................................................................................................33
SPECIFICATIONS..............................................................................................................................................48
ABSOLUTE MAXIMUM RATINGS...............................................................................................................48
DC CHARACTERISTICS .............................................................................................................................49
AC CHARACTERISTICS.............................................................................................................................52
REFERENCE APPLICATIONS........................................................................................................................... 56
MICROPROCESSOR INTERFACE.............................................................................................................56
CONNECTIONS BETWEEN S6B0724 AND LCD PANEL............................................................................57
3
Page 4
Page 5
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
INTRODUCTION
The S6B0724 is a single chip driver & controller LSI for graphic dot-matrix liquid crystal display systems. This chip
can be connected directly to a microprocessor, accepts serial or 8-bit parallel display data from the
microprocessor, stores the display data in an on-chip display data RAM of 65 x 132 bits and generates a liquid
crystal display drive signal independent of the microprocessor. It provides a high-flexible display section due to 1to-1 correspondence between on-chip display data RAM bits and LCD panel pixels. It contains 65 common driver
circuits and 132 segment driver circuits, so that a single chip can drive a 65 x 132 dot display. And the capacity of
the display can be increased through the use of master/slave multi-chip structures.
These chip are able to minimize power consumption because it performs display data RAM read / write operation
with no external operation clock. In addition, because it contains power supply circuits necessary to drive liquid
crystal, which is a display clock oscillator circuit, high performance voltage converter circuit, high-accuracy voltage
regulator circuit, low power consumption voltage divider resistors and OP-Amp for liquid crystal driver power
voltage, it is possible to make the lowest power consumption display system with the fewest components for high
performance portable systems.
FEATURES
Display Driver Output Circuits
− 65 common outputs / 132 segment outputs
On-chip Display Data RAM
− Capacity: 65 x 132 = 8,580 bits
− RAM bit data “1”: a dot of display is illuminated.
− RAM bit data “0”: a dot of display is not illuminated.
Applicable Duty Ratios
Duty ratio Applicable LCD bias Maximum display area
1/65 1/7 or 1/9
1/55 1/6 or 1/8
1/49 1/6 or 1/8
1/33 1/5 or 1/6
Microprocessor Interface
− High-speed 8-bit parallel bi-directional interface with 6800-series or 8080-series
− Serial interface (only write operation) available
Various Function Set
− Display ON / OFF, set initial display line, set page address, set column address, read status, write / read
display data, select segment driver output, reverse display ON / OFF, entire display ON / OFF, select LCD
bias, set/reset modify-read, select common driver output, control display power circuit, select internal regulator
resistor ratio for V0 voltage regulation, electronic volume, set static indicator state.
− H/W and S/W reset available
− Static drive circuit equipped internally for indicators with 4 flashing modes
65 × 132
55 × 132
49 × 132
33 × 132
1
Page 6
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Built-in Analog Circuit
− On-chip oscillator circuit for display clock (external clock can also be used)
− High performance voltage converter (with booster ratios of x2, x3, x4 and x5, where the step-up reference
voltage can be used externally)
− High accuracy voltage regulator (temperature coefficient: -0.05%/°C or external input)
− Electronic contrast control function (64 steps)
− Vref = 2.1V ± 3% (V0 voltage adjustment voltage)
− High performance voltage follower (V1 to V4 voltage divider resistors and OP-Amp for increasing drive
capacity)
Operating Voltage Range
− Supply voltage (VDD): 2.4 to 3.6 V
− LCD driving voltage (VLCD = V0 - VSS): 4.5 to 15.0 V
Low Power Consumption
− Operating power: 40µΑ typical. (condition: VDD = 3V, x 4 boosting (VCI is VDD), V0 = 11V, internal power
supply ON, display OFF and normal mode is selected)
− Standby power: 10µΑ maximum. (during power save[standby] mode)
Operating Temperatures
− Wide range of operating temperatures : -40 to 85°C
CMOS Process
Package Type
− Gold bumped chip
2
Page 7
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
V
TEST1
TEST2
TEST3
COMS
COM63
LCD
BLOCK DIAGRAM
SEG131
SEG130
VDD
V0
V1
V2
V3
V4
SS
COMS
COM0
:
33 COMMON
DRIVER
CIRCUITS
COM31
SEG0
SEG2
SEG1
132 SEGMENT
DRIVER CIRCUITS
SEG129
:
:
COM32
:
33 COMMON
DRIVER
CIRCUITS
HPMB
V0
VR
INTRS
REF
VEXT
VOUT
C1-
C1+
C2C2+
C3+
C4+
VCI
V / F
CIRCUIT
V / R
CIRCUIT
V / C
CIRCUIT
PAGE
ADDRESS
CIRCUIT
I/O
BUFFER
DISPLAY DATA
CONTROL CIRCUIT
DISPLAY DATA RAM
65 X 132 = 8,580 Bits
COLUMN ADDRESS
CIRCUIT
STATUS REGISTER INSTRUCTION REGISTER
COMMON OUTPUT
CONTROLLER CIRCUIT
LINE
ADDRESS
CIRCUIT
INSTRUCTION DECODERBUS HOLDER
DISPLAY
TIMING
GENERATOR
CIRCUIT
OSCILLATOR
MS
CL
M
FRS
FR
DISP
DUTY0
DUTY1
CLS
MPU INTERFACE (PARALLEL & SERIAL)
DB0
DB1
DB2
DB3
DB4
DB5
DB6(SCLK)
DB7(SID)
C68
RESETB
PS
RW_WRB
E_RD
RS
CS2
CS1B
Figure 1. Block Diagram
3
Page 8
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
138
285
137
286
110
313
109
1
ð
ððð
- - - -
ðððð
ð
ððð
- - - -
ðððð
(-4040, -529)
(+4040, -544)
30
µ
m
30
µ
m
30
µ
m
60
µ
m
30
µ
m
42
µ
m
108
µ
m
42
µ
m
108
µ
m
(-4170, +427)
(+4170, +427)
S6B0724
PAD CONFIGURATION
р р рррррр рррррррррррррр
- - - - - - - - - -
Y
рррррррррррррр
S6B0724
(TOP VIEW)
рррррррррррррррррррррр
Figure 2. S6B0724 Chip Configuration
Table 1. S6B0724 Pad Dimensions
Item Pad No.
Chip size - 9680 2030
1 to 109 70
Pad pitch
Bumped pad size
110 to 137, 140 to 283
287 to 313
137 to 139, 284 to 286 80
1 to 109 50 100
110 to 136 122 40
140 to 283 40 122
287 to 313 122 40
138,139,284,285 60 122
137, 286 122 60
(0,0)
- - - - - - - - - -
X
ррррррррррррррррррррррр
X Y
Size
60
рррррр р р
Unit
µm
Bumped pad height All pad 14 (Typ.)
COG Align Key Coordinate ILB Align Key Coordinate
30µm 30µm 30µm
4
30µm 30µm 30µm
42µm 108µm
42µm108µm
Page 9
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
PAD CENTER COORDINATES
Table 2. Pad Center Coordinates
[Unit: µm]
Pad
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Pad
name
FRS
FR
TEST1
TEST2
TEST3
M
CL
DISP
VSS
VSS
CS1B
CS2
VDD
RESETB
RS
VSS
RW_WRB
E_RDB
VDD
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
VSS
VDD
DUTY0
DUTY1
VSS
VDD
VDD
VDD
VDD
VDD
VCI
VCI
VCI
VSS
VSS
VSS
VSS
VSS
VOUT
VOUT
VOUT
VOUT
C4+
X Y
-3780
-3710
-3640
-3570
-3500
-3430
-3360
-3290
-3220
-3150
-3080
-3010
-2940
-2870
-2800
-2730
-2660
-2590
-2520
-2450
-2380
-2310
-2240
-2170
-2100
-2030
-1960
-1890
-1820
-1750
-1680
-1610
-1540
-1470
-1400
-1330
-1260
-1190
-1120
-1050
-980
-910
-840
-770
-700
-630
-560
-490
-420
-350
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
Pad
No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Pad
name
C4+
C4+
C4+
C3+
C3+
C3+
C3+
C1C1C1C1C1+
C1+
C1+
C1+
C2+
C2+
C2+
C2+
C2C2C2C2VDD
VEXT
VEXT
REF
VSS
V1
V1
V1
V2
V2
V2
V3
V3
V3
V4
V4
V4
V0
V0
V0
VR
VR
VR
VSS
VSS
VDD
MS
X Y
-280
-210
-140
-70
0
70
140
210
280
350
420
490
560
630
700
770
840
910
980
1050
1120
1190
1260
1330
1400
1470
1540
1610
1680
1750
1820
1890
1960
2030
2100
2170
2240
2310
2380
2450
2520
2590
2660
2730
2800
2870
2940
3010
3080
3150
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
-879
Pad
No.
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
Pad
name
CLS
VSS
C68
PS
VDD
HPMB
VSS
INTRS
VDD
COM31
COM30
COM29
COM28
COM27
COM26
COM25
COM24
COM23
COM22
COM21
COM20
COM19
COM18
COM17
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
DUMMY1
DUMMY2
DUMMY3
COM4
COM3
COM2
COM1
COM0
COMS
SEG0
SEG1
SEG2
SEG3
SEG4
X Y
3220
3290
3360
3430
3500
3570
3640
3710
3780
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4693
4470
4390
4310
4250
4190
4130
4070
4010
3930
3870
3810
3750
3690
-879
-879
-879
-879
-879
-879
-879
-879
-879
-780
-720
-660
-600
-540
-480
-420
-360
-300
-240
-180
-120
-60
0
60
120
180
240
300
360
420
480
540
600
660
720
780
860
868
868
868
868
868
868
868
868
868
868
868
868
868
5
Page 10
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Table 2. Pad Center Coordinates (Continued)
Pad
No.
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
Pad
name
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
SEG50
SEG51
SEG52
SEG53
SEG54
X Y
3630
3570
3510
3450
3390
3330
3270
3210
3150
3090
3030
2970
2910
2850
2790
2730
2670
2610
2550
2490
2430
2370
2310
2250
2190
2130
2070
2010
1950
1890
1830
1770
1710
1650
1590
1530
1470
1410
1350
1290
1230
1170
1110
1050
990
930
870
810
750
690
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
Pad
No.
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
Pad
name
SEG55
SEG56
SEG57
SEG58
SEG59
SEG60
SEG61
SEG62
SEG63
SEG64
SEG65
SEG66
SEG67
SEG68
SEG69
SEG70
SEG71
SEG72
SEG73
SEG74
SEG75
SEG76
SEG77
SEG78
SEG79
SEG80
SEG81
SEG82
SEG83
SEG84
SEG85
SEG86
SEG87
SEG88
SEG89
SEG90
SEG91
SEG92
SEG93
SEG94
SEG95
SEG96
SEG97
SEG98
SEG99
SEG100
SEG101
SEG102
SEG103
SEG104
X Y
630
570
510
450
390
330
270
210
150
90
30
-30
-90
-150
-210
-270
-330
-390
-450
-510
-570
-630
-690
-750
-810
-870
-930
-990
-1050
-1110
-1170
-1230
-1290
-1350
-1410
-1470
-1530
-1590
-1650
-1710
-1770
-1830
-1890
-1950
-2010
-2070
-2130
-2190
-2250
-2310
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
Pad
No.
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
Pad
name
SEG105
SEG106
SEG107
SEG108
SEG109
SEG110
SEG111
SEG112
SEG113
SEG114
SEG115
SEG116
SEG117
SEG118
SEG119
SEG120
SEG121
SEG122
SEG123
SEG124
SEG125
SEG126
SEG127
SEG128
SEG129
SEG130
SEG131
COM32
COM33
COM34
COM35
COM36
COM37
DUMMY4
DUMMY5
DUMMY6
COM38
COM39
COM40
COM41
COM42
COM43
COM44
COM45
COM46
COM47
COM48
COM49
COM50
COM51
X Y
-2370
-2430
-2490
-2550
-2610
-2670
-2730
-2790
-2850
-2910
-2970
-3030
-3090
-3150
-3210
-3270
-3330
-3390
-3450
-3510
-3570
-3630
-3690
-3750
-3810
-3870
-3930
-4010
-4070
-4130
-4190
-4250
-4310
-4390
-4470
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
[Unit: µm]
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
868
860
780
720
660
600
540
480
420
360
300
240
180
120
60
0
6
Page 11
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Table 2. Pad Center Coordinates (Continued)
[Unit: µm]
Pad
No.
301
302
303
304
305
306
307
308
309
310
311
312
313
Pad
name
COM52
COM53
COM54
COM55
COM56
COM57
COM58
COM59
COM60
COM61
COM62
COM63
COMS
X Y
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-4693
-60
-120
-180
-240
-300
-360
-420
-480
-540
-600
-660
-720
-780
Pad
No.
Pad
name
X Y
Pad
No.
Pad
name
X Y
7
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
PIN DESCRIPTION
POWER SUPPLY
Table 3. Power Supply Pins Description
Name I/O Description
VDD Supply Power supply
VSS Supply Ground
LCD driver supply voltages
The voltage determined by LCD pixel is impedance-converted by an operational amplifier
for application.
Voltages should have the following relationship;
V0
V1
V2
V3
V4
I/O
V0 ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ VSS
When the internal power circuit is active, these voltages are generated as following table
according to the state of LCD bias.
LCD bias V1 V2 V3 V4
1/9 bias (8/9) x V0 (7/9) x V0 (2/9) x V0 (1/9) x V0
1/8 bias (7/8) x V0 (6/8) x V0 (2/8) x V0 (1/8) x V0
1/7 bias (6/7) x V0 (5/7) x V0 (2/7) x V0 (1/7) x V0
1/6 bias (5/6) x V0 (4/6) x V0 (2/6) x V0 (1/6) x V0
1/5 bias (4/5) x V0 (3/5) x V0 (2/5) x V0 (1/5) x V0
LCD DRIVER SUPPLY
Table 4. LCD Driver Supply Pins Description
Name I/O Description
C1- O Capacitor 1 negative connection pin for voltage converter
C1+ O Capacitor 1 positive connection pin for voltage converter
C2- O Capacitor 2 negative connection pin for voltage converter
C2+ O Capacitor 2 positive connection pin for voltage converter
C3+ O Capacitor 3 positive connection pin for voltage converter
C4+ O Capacitor 4 positive connection pin for voltage converter
VOUT I/O
VR I
VCI I
VEXT I
REF I
Voltage converter input / output pin
Connect this pin to VSS through capacitor.
V0 voltage adjustment pin
It is valid only when internal voltage regulator resistors are not used (INTRS = "L").
This is the reference voltage for the voltage converter circuit for the LCD drive.
Whether internal voltage converter use or not use, this pin should be fixed.
The voltage should have the following range: 2.4V ≤ VCI ≤ 3.6V
This is the externally input reference voltage (VREF) for the internal voltage regulator.
It is valid only when external VREF is used (REF = "L").
When using internal VREF, this pin is Open
Select the external VREF voltage via VEXT pin
− REF = "L": using the external VREF
− REF = "H": using the internal VREF
8
Page 13
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
SYSTEM CONTROL
Table 5. System Control Pins Description
Name I/O Description
Master / slave mode select input
Master makes some signals for display, and slave gets them. This is for display
synchronization.
− MS = "H": master mode
− MS = "L": slave mode
The following table depends on the MS status.
MS I
MS CLS
OSC
circuit
H Enabled Enabled Output Output Output Output
H
L Disabled Enabled Input Output Output Output
L - Disabled Disabled Input Input Output Input
Power
supply
circuit
CL M FR DISP
CLS I
CL I/O
M I/O
FRS O
FR O
DISP I/O
INTRS I
Built-in oscillator circuit enable / disable select pin
− CLS = "H": enable
− CLS = "L": disable (external display clock input to CL pin)
Display clock input / output pin
When the S6B0724 is used in master/slave mode (multi-chip), the CL pins must be
connected each other.
LCD AC Signal input / output pin
When the S6B0724 is used in master/slave mode (multi-chip), the M pins must be
connected each other.
− MS = "H": output
− MS = "L": input
Static driver segment output pin
This pin is used together with the FR pin.
Static driver common output pin
This pin is used together with the FRS pin.
LCD display blanking control input / output
When S6B0724 is used in master / slave mode (multi-chip), the DISP pins must be
connected each other.
− MS = "H": output
− MS = "L": input
Internal resistor select pin
This pin selects the resistors for adjusting V0 voltage level and is valid only in master
operation.
− INTRS = "H": use the internal resistors
− INTRS = "L": use the external resistors
V0 voltage is controlled by VR pin and external resistive divider.
9
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Table 5. System Control Pins Description (Continued)
Name I/O Description
The LCD driver duty ratio depends on the following table.
DUTY1 DUTY0 Duty ratio
DUTY0
DUTY1
I
L L 1/33
L H 1/49
H L 1/55
H H 1/65
Power control pin of the power supply circuits for LCD driver
HPMB I
− HPMB = "H": normal mode
− HPMB = "L": high power mode
This pin is valid only in master operation.
10
Page 15
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
MICROPROCESSOR INTERFACE
Table 6. Microprocessor Interface Pins Description
Name I/O Description
RESETB I
PS I
C68 I
CS1B
CS2
RS I
RW_WRB I
Reset input pin
When RESETB is "L", initialization is executed.
Parallel / Serial data input select input
PS
Interface
mode
H Parallel
L Serial
Chip
select
CS1B,
CS2
CS1B,
CS2
Data /
instruction
RS DB0 to DB7
Data Read / Write Serial clock
E_RDB
RW_WRB
RS SID (DB7) Write only SCLK (DB6)
*NOTE: In serial mode, it is impossible to read data from the on-chip RAM. And DB0 to
DB5 are high impedance and E_RDB and RW_WRB must be fixed to either "H" or "L".
Microprocessor Interface Select input pin in parallel mode
− C68 = "H": 6800-series MPU interface
− C68 = "L": 8080-series MPU interface
Chip select input pins
I
Data / instruction I/O is enabled only when CS1B is "L" and CS2 is "H". When chip
select is non-active, DB0 to DB7 may be high impedance.
Register select input pin
− RS = "H": DB0 to DB7 are display data
− RS = "L": DB0 to DB7 are control data
Read / Write execution control pin
C68 MPU Type RW_WRB Description
Read / Write control input pin
H 6800-series RW
− RW = "H": read
− RW = "L": write
Write enable clock input pin
L 8080-series /WRB
The data on DB0 to DB7 are latched at the rising
edge of the /WRB signal.
-
11
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Table 6. Microprocessor Interface Pins Description (Continued)
Name I/O Description
Read / Write execution control pin
C68 MPU Type E_RDB Description
Read / Write control input pin
− RW = "H": When E is "H", DB0 to DB7 are in an
E_RDB I
H 6800-series E
output status.
− RW = "L": The data on DB0 to DB7 are latched at
the falling edge of the E signal.
Read enable clock input pin
L 8080-series /RDB
When /RDB is "L", DB0 to DB7 are in an output
status.
8-bit bi-directional data bus that is connected to the standard 8-bit microprocessor data
DB0
to
DB7
I/O
bus. When the serial interface selected (PS = "L");
− DB0 to DB5: high impedance
− DB6: serial input clock (SCLK)
− DB7: serial input data (SID)
When chip select is not active, DB0 to DB7 may be high impedance.
TEST1
to
TEST3
I/O
These are pins for IC chip testing.
They are set to Open.
12
Page 17
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
LCD DRIVER OUTPUTS
Table 7. LCD Driver Output Pins Description
Name I/O Description
LCD segment driver outputs
The display data and the M signal control the output voltage of segment driver.
SEG0
to
SEG131
COM0
to
COM63
COMS O
Display data M
Segment driver output voltage
Normal display Reverse display
H H V0 V2
O
H L VSS V3
L H V2 V0
L L V3 VSS
Power save mode VSS VSS
LCD common driver outputs
The internal scanning data and M signal control the output voltage of common driver.
Scan data M Common driver output voltage
H H VSS
O
H L V0
L H V1
L L V4
Power save mode VSS
Common output for the icons
The output signals of two pins are same. When not used, these pins should be left Open.
In multi-chip (master / slave) mode, all COMS pin on both master and slave units are the
same signal.
NOTE: DUMMY - These pins should be opened (floated).
13
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
FUNCTIONAL DESCRIPTION
MICROPROCESSOR INTERFACE
Chip Select Input
There are CS1B and CS2 pins for chip selection. The S6B0724 can interface with an MPU only when CS1B is "L"
and CS2 is "H". When these pins are set to any other combination, RS, E_RDB, and RW_WRB inputs are
disabled and DB0 to DB7 are to be high impedance. And, in case of serial interface, the internal shift register and
the counter are reset.
Parallel / Serial Interface
S6B0724 has three types of interface with an MPU, which are one serial and two parallel interfaces. This parallel
or serial interface is determined by PS pin as shown in table 8.
Table 8. Parallel / Serial Interface Mode
PS Type CS1B CS2 C68 Interface mode
H Parallel CS1B CS2
L Serial CS1B CS2
Parallel interface (PS = "H")
The 8-bit bi-directional data bus is used in parallel interface and the type of MPU is selected by C68 as shown in
table 9. The type of data transfer is determined by signals at RS, E_RDB and RW_WRB as shown in Table 10.
Table 9. Microprocessor Selection for Parallel Interface
C68 CS1B CS2 RS E_RDB RW_WRB DB0 to DB7 MPU bus
H CS1B CS2 RS E RW DB0 to DB7 6800-series
L CS1B CS2 RS /RDB /WRB DB0 to DB7 8080-series
Table 10. Parallel Data Transfer
Common 6800-series 8080-series
RS
E_RDB
(E)
RW_WRB
(RW)
E_RDB
(/RDB)
RW_WRB
(/WRB)
H 6800-series MPU mode
L 8080-series MPU mode
*×
Description
Serial-mode
*×: Don't care
H H H L H Display data read out
H H L H L Display data write
L H H L H Register status read
L H L H L Writes to internal register (instruction)
14
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Serial Interface (PS = "L")
When the S6B0724 is active, serial data (DB7) and serial clock (DB6) inputs are enabled. And not active, the
internal 8-bit shift register and the 3-bit counter are reset. Serial data can be read on the rising edge of serial clock
going into DB6 and processed as 8-bit parallel data on the eighth serial clock. Serial data input is display data
when RS is high and control data when RS is low. Since the clock signal (DB6) is easy to be affected by the
external noise caused by the line length, the operation check on the actual machine is recommended.
CS1B
CS2
SID
SCLK
RS
DB6DB7DB0DB1DB2DB3DB4DB5DB6DB7
Figure 3. Serial Interface Timing
Busy Flag
The Busy Flag indicates whether the S6B0724 is operating or not. When DB7 is "H" in read status operation, this
device is in busy status and will accept only read status instruction. If the cycle time is correct, the microprocessor
needs not to check this flag before each instruction, which improves the MPU performance.
Data Transfer
The S6B0724 uses bus holder and internal data bus for data transfer with the MPU. When writing data from the
MPU to on-chip RAM, data is automatically transferred from the bus holder to the RAM as shown in figure 4. And
when reading data from on-chip RAM to the MPU, the data for the initial read cycle is stored in the bus holder
(dummy read) and the MPU reads this stored data from bus holder for the next data read cycle as shown in figure
5. This means that a dummy read cycle must be inserted between each pair of address sets when a sequence of
address sets is executed. Therefore, the data of the specified address cannot be output with the read display data
instruction right after the address sets, but can be output at the second read of data.
15
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
N
D(N)
D(N+1)
D(N+2)
N
N+1
N+2
N+3
S6B0724
MPU signals
RS
/WRB
DB0 to DB7
Internal signals
/WRB
BUS HOLDER
COLUMN ADDRESS
MPU signals
RS
/WRB
/RDB
N D(N) D(N+1) D(N+2) D(N+3)
N D(N) D(N+1) D(N+2) D(N+3)
N N+1 N+2 N+3
Figure 4. Write Timing
16
DB0 to DB7
Internal signals
/WRB
/RDB
BUS HOLDER
COLUMN ADDRESS
N
Dummy D(N) D(N+1)
Figure 5. Read Timing
D(N+2)
Page 21
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
DISPLAY DATA RAM (DDRAM)
The Display Data RAM stores pixel data for the LCD. It is 65-row by 132-column addressable array. Each pixel
can be selected when the page and column addresses are specified. The 65 rows are divided into 8 pages of 8
lines and the 9th page with a single line (DB0 only). Data is read from or written to the 8 lines of each page
directly through DB0 to DB7. The display data of DB0 to DB7 from the microprocessor correspond to the LCD
common lines as shown in figure 6. The microprocessor can read from and write to RAM through the I/O buffer.
Since the LCD controller operates independently, data can be written into RAM at the same time as data is being
displayed without causing the LCD flicker.
DB0 0 0 1 - - 0
DB1 1 0 0 - - 1
DB2 0 1 1 - - 0
DB3 1 0 1 - - 0
DB4 0 0 0 - - 1
COM0 - -
COM1 - COM2 - COM3 - COM4 - -
Display Data RAM LCD Display
Figure 6. RAM-to-LCD Data Transfer
Page Address Circuit
This circuit is for providing a Page Address to DISPLAY-DATA-RAM shown in figure 8. It incorporates 4-bit Page
Address register changed by only the "Set Page" instruction. Page Address 8 (DB3 is "H", but DB2, DB1 and DB0
are "L") is a special RAM area for the icons and display data DB0 is only valid. When Page Address is above 8, it
is impossible to access to on-chip RAM.
Line Address Circuit
This circuit assigns DDRAM a Line Address corresponding to the first line (COM0) of the display. Therefore, by
setting line address repeatedly, it is possible to realize the screen scrolling and page switching without changing
the contents of on-chip RAM as shown in figure 8. It incorporates 6-bit line address register changed by only the
initial display line instruction and 6-bit counter circuit. At the beginning of each LCD frame, the contents of register
are copied to the line counter which is increased by CL signal and generates the Line Address for transferring the
132-bit RAM data to the display data latch circuit. However, display data of icons are not scrolled because the
MPU can not access Line Address of icons.
17
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Column Address Circuit
Column Address circuit has an 8-bit preset counter that provides column address to the Display Data RAM as
shown in figure 8. When set Column Address MSB / LSB instruction is issued, 8-bit [Y7:Y0] is updated. And, since
this address is increased by 1 each a read or write data instruction, microprocessor can access the display data
continuously. However, the counter is not increased and locked if a non-existing address above 84H. It is
unlocked if a column address is set again by set Column Address MSB / LSB instruction. And the Column
Address counter is independent of page address register.
ADC select instruction makes it possible to invert the relationship between the Column Address and the segment
outputs. It is necessary to rewrite the display data on built-in RAM after issuing ADC Select instruction. Refer to
the following figure 7.
SEG output
SEG
0
SEG
1
SEG
2
SEG
3
... ...
SEG
128
SEG
129
SEG
130
SEG
131
Column address [Y7:Y0] 00H 01H 02H 03H ... ... 80H 81H 82H 83H
Display data 1 0 1 0 1 1 0 0
LCD panel display
... ...
(ADC = 0)
LCD panel display
( ADC = 1 )
... ...
Figure 7. The Relationship between the Column Address and the Segment Outputs
Segment Control Circuit
This circuit controls the display data by the display ON / OFF, reverse display ON / OFF and entire display ON /
OFF instructions without changing the data in the display data RAM.
18
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Page Address
DB3 DB0DB1DB2
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
Column
Address
LCD Output
Data
ADC=0
ADC=1
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
00-02 0403 05
83 81 7F80 7E
82
SEG1
SEG0
SEG2
SEG3
SEG4
SEG5
Page0
Page1
Page2
Page3
Page4
Page5
Page6
Page7
Page8
- - - - -
- - - - -
- - - - -
7E 7F 80 8281 8301
05 04 03 0102 00
SEG127
SEG126
SEG129
SEG128
SEG130
SEG131
Line
Address
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
0EH
0FH
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH
1CH
1DH
1EH
1FH
20H
21H
22H
23H
24H
25H
26H
27H
28H
29H
2AH
2BH
2CH
2DH
2EH
2FH
30H
31H
32H
33H
34H
35H
36H
37H
38H
39H
3AH
3BH
3CH
3DH
3EH
3FH
Start
1/49
Duty
1/55
When the initial display
line address
is 1C[HEX]
Duty
1/33
Duty
COM
Output
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
COM17
COM18
COM19
COM20
COM21
COM22
COM23
COM24
COM25
COM26
COM27
COM28
COM29
COM30
COM31
COM32
COM33
COM34
COM35
COM36
COM37
COM38
COM39
COM40
COM41
COM42
COM43
COM44
COM45
COM46
COM47
COM48
COM49
COM50
COM51
COM52
COM53
COM54
COM55
COM56
COM57
COM58
COM59
COM60
COM61
COM62
COM63
COMS
Figure 8. Display Data RAM Map
19
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
LCD DISPLAY CIRCUITS
Oscillator
This is completely on-chip oscillator and its frequency is nearly independent of VDD. This oscillator signal is used
in the voltage converter and display timing generation circuit. The oscillator circuit is only enabled when MS = "H"
and CLS = "H". When on-chip oscillator is not used, CLS pin must be "L" condition. In this time, external clock
must be input from CL pin
Display Timing Generator Circuit
This circuit generates some signals to be used for displaying LCD. The display clock, CL generated by oscillation
clock, generates a clock to the line counter and a latch signal to the display data latch. The line address of on-chip
RAM is generated in synchronization with the display clock (CL) and the 132-bit display data is latched by the
display data latch circuit in synchronization with the display clock. The display data which is read to the LCD driver
is completely independent of the access to the display data RAM from the microprocessor. The LCD AC signal, M
is generated from the display clock. 2-frame AC driver waveforms with internal timing signal are shown in figure 9.
In a multiple chip configuration, the slave chip requires the M, CL and DISP signals from the master. Table 11
shows the M, SYNC, CL, and DISP status.
Table 11. Master and Slave Timing Signal Status
Operation mode Oscillator
ON (internal clock used) Output Output Output
Master
OFF(external clock used) Output Input Output
Slave - Input Input Input
64 65 1 2 3 4 5 6 7 8 9 10 11 12 58 59 60 61 62 63 64 65 1 2 3 4 5 6
CL
FR
COM0
COM1
SEGn
M CL DISP
V0
V1
V2
V3
V4
V
V0
V1
V2
V3
V4
V
V0
V1
V2
V3
V4
V
SS
SS
SS
20
Figure 9. 2-frame AC Driving Waveform (Duty Ratio = 1/65)
Page 25
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Common Output Control Circuit
This circuit controls the relationship between the number of common output and specified duty ratio. SHL select
Instruction specifies the scanning direction of the common output pins.
Table 12. The Relationship between Duty Ratio and Common Output
Common output pins
Duty SHL
1/33
1/49
0 COM[0:15] *NC COM[16:31]
1 COM[31:16] *NC COM[15:0]
0 COM[0:23] *NC COM[24:47]
1 COM[47:24] *NC COM[23:0]
1/55
1/65
0 COM[0:63]
1 COM[63:0]
COM
[0:15]
COM
[16:23]
COM
[24:26]
COM
[27:36]
COM
[37:39]
COM
[40:47]
COM[0:26] *NC COM[27:53]
COM[53:27] *NC COM[26:0]
COM
[48:63]
COMS
COMS
COMS
COMS
COMS
*NC: No Connection
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
SEG2
SEG1
SEG0
COM2
COM0
COM1
FR
V
V
V
V
V
V
S6B0724
LCD DRIVER CIRCUIT
This driver circuit is configured by 66-channel (including 2 COMS channels) common driver and 132-channel
segment driver. This LCD panel driver voltage depends on the combination of display data and FR signal.
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
VDD
VSS
V0
V1
V2
V3
V4
SS
V0
V1
V2
V3
V4
SS
V0
V1
V2
V3
V4
SS
V0
V1
V2
V3
V4
SS
V0
V1
V2
V3
V4
SS
S
S
S
S
S
E
E
E
E
E
G
G
G
0
2
1
G
G
4
3
V0
V1
V2
V3
V4
SS
Figure 10. Segment and Common Timing
22
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
POWER SUPPLY CIRCUITS
The Power Supply circuits generate the voltage levels necessary to drive liquid crystal driver circuits with low
power consumption and the fewest components. There are voltage converter circuits, voltage regulator circuits,
and voltage follower circuits. They are valid only in master operation and controlled by power control instruction.
For details, refers to "Instruction Description". Table 13 shows the referenced combinations in using Power Supply
circuits.
Table 13. Recommended Power Supply Combinations
User setup
Only the internal power
supply circuits are used
Only the voltage
regulator circuits and
voltage follower circuits
are used
Only the voltage follower
circuits are used
Only the external power
supply circuits are used
Power
control
(VC VR VF)
V/C
circuits
V/R
circuits
V/F
circuits
VOUT V0 V1 to V4
1 1 1 ON ON ON Open Open Open
0 1 1 OFF ON ON
0 0 1 OFF OFF ON Open
0 0 0 OFF OFF OFF Open
External
input
Open Open
External
input
External
input
Open
External
input
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
VOUT= 2 × VCI
V
SS
VCI
VCI
VOUT
C4+
C3+
C1C1+
C2+
C2-
VOUT= 3 × VCI
V
SS
VOUT= 4 × VCI
VSS
VOUT= 5 × VCI
VCI
VSS
S6B0724
Voltage Converter Circuits
These circuits boost up the electric potential between VCI and VSS to 2, 3, 4 or 5 times toward positive side and
boosted voltage is outputted from VOUT pin.
[C1 = 1.0 to 4.7 µF]
VDD
VOUT
VCI
SS
V
C4+
C3+
C1C1+
C2+
C2-
VCI
C1
+
C1
+
VDD
VCI
SS
V
C1
+
C1
+
+
C1
-
VCI
Figure 11. Two Times Boosting Circuit Figure 12. Three Times Boosting Circuit
VDDVDD
VCI
C1
+
+
C1
-
C1
+
+
+
C1
C1
-
-
VCI
VSS
VOUT
C4+
C3+
C1C1+
C2+
C2-
VCI
VCI
C1
+
VSS
VOUT
C4+
+
C1
-
C1
+
+
C1
VCI
-
C3+
C1C1+
C2+
C2-
Figure 13. Four Times Boosting Circuit Figure 14. Five Times Boosting Circuit
rated value
24
* The VCI voltage range must be set so that the VOUT voltage does not exceed the absolute maximum
Page 29
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Voltage Regulator Circuits
The function of the internal Voltage Regulator circuits is to determine liquid crystal operating voltage, V0, by
adjusting resistors, Ra and Rb, within the range of |V0| < |VOUT|. Because VOUT is the operating voltage of
operational-amplifier circuits shown in figure 15, it is necessary to be applied internally or externally.
For the Eq. 1, we determine V0 by Ra, Rb and VEV. The Ra and Rb are connected internally or externally by
INTRS pin. And VEV called the voltage of electronic volume is determined by Eq. 2, where the parameter α is the
value selected by instruction, "Set Reference Voltage Register", within the range 0 to 63. VREF voltage at Ta =
25°C is shown in table 14-1.
Rb
V0 = ( 1 + ) x VEV [V] ------ (Eq. 1)
Ra
(63 - α)
VEV = ( 1 - ) x VREF [V] ------ (Eq. 2)
162
Table 14-1. VREF Voltage at Ta = 25 °°C
REF Temp. coefficient VREF [V]
H
-0.05% / °C
L External input VEXT
Table 14-2. Electronic Contrast Control Register (64 Steps)
SV5 SV4 SV3 SV2 SV1 SV0
Reference voltage
parameter (αα)
0 0 0 0 0 0 0
0 0 0 0 0 1 1
:
:
:
:
:
:
:
:
:
:
:
:
:
:
1 0 0 0 0 0 32 (default)
:
:
:
:
:
:
:
:
:
:
:
:
:
:
1 1 1 1 1 0 62
1 1 1 1 1 1 63
2.1
V0 Contrast
Minimum
:
:
:
:
:
Maximum
Low
:
:
:
:
:
High
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
GND
Ra
Rb
VSSVRV0VOUT
S6B0724
+
EV
V
-
Figure 15. Internal Voltage Regulator Circuit
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
In Case of Using Internal Resistors, Ra and Rb. (INTRS = "H")
When INTRS pin is "H", resistor Ra is connected internally between VR pin and VSS, and Rb is connected
between V0 and VR. We determine V0 by two instructions, "Regulator Resistor Select" and "Set Reference
Voltage".
Table 15. Internal Rb / Ra Ratio depending on 3-bit Data ( R2 R1 R0 )
3-bit data settings (R2 R1 R0)
0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1
1+(Rb / Ra)
The following figure shows V0 voltage measured by adjusting internal regulator resistor ratio (Rb / Ra) and 6-bit
electronic volume registers for each temperature coefficient at Ta = 25 °C.
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.4
16.00
V0
[V]
14.00
12.00
10.00
8.00
6.00
(1 1 1)
(1 1 0)
(1 0 1)
(1 0 0)
(0 1 1)
(0 1 0)
(0 0 1)
(0 0 0)
4.00
2.00
0.00
0 8 16 24 32 40 48 56
Electronic volume level
Figure 16. Electronic Volume Level
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
In Case of Using External Resistors, Ra and Rb. (INTRS = "L")
When INTRS pin is "L", it is necessary to connect external regulator resistor Ra between VR and VSS, and Rb
between V0 and VR.
Example: For the following requirements
1. LCD driver voltage, V0 = 10V
2. 6-bit reference voltage register = (1, 0, 0, 0, 0, 0)
3. Maximum current flowing Ra, Rb = 1 uA
From Eq. 1
Rb
10 = ( 1 + ) x VEV [V] ------ (Eq. 3)
Ra
From Eq. 2
(63 - 32)
VEV = ( 1 - ) x 2.1 ≅ 1.698 [V] ------ (Eq. 4)
162
From requirement 3.
10
= 1 [uA] ------ (Eq. 5)
Ra + Rb
From equations Eq. 3, 4 and 5
Ra ≅ 1.69 [MΩ]
Rb ≅ 8.31 [MΩ]
The following table shows the range of V0 depending on the above requirements.
Table 16. V0 Depending on Electronic Volume Level
Electronic volume level
0 ....... 32 ....... 63
V0 7.57 ....... 10.00 ....... 12.43
28
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Voltage Follower Circuits
VLCD voltage (V0) is resistively divided into four voltage levels (V1, V2, V3 and V4) and those output impedance
are converted by the Voltage Follower for increasing drive capability. The following table shows the relationship
between V1 to V4 level and each duty ratio.
Table 17. The Relationship between V1 to V4 Level and Duty Ratio
Duty ratio DUTY1 DUTY0
LCD bias V1 V2 V3 V4
1/5 (4/5) x V0 (3/5) x V0 (2/5) x V0 (1/5) x V0
1/33 L L
1/6 (5/6) x V0 (4/6) x V0 (2/6) x V0 (1/6) x V0
1/6 (5/6) x V0 (4/6) x V0 (2/6) x V0 (1/6) x V0
1/49 L H
1/8 (7/8) x V0 (6/8) x V0 (2/8) x V0 (1/8) x V0
1/6 (5/6) x V0 (4/6) x V0 (2/6) x V0 (1/6) x V0
1/55 H L
1/8 (7/8) x V0 (6/8) x V0 (2/8) x V0 (1/8) x V0
1/7 (6/7) x V0 (5/7) x V0 (2/7) x V0 (1/7) x V0
1/65 H H
1/9 (8/9) x V0 (7/9) x V0 (2/9) x V0 (1/9) x V0
High Power Mode
The power supply circuit equipped in the S6B0724 for LCD drive has very low power consumption (in normal
mode: HPMB = "H"). If use for LCD panels with large loads, this low-power power supply may cause display
quality to degrade. When this occurs, setting the HPMB pin to "L" (high power mode) can improve the quality of
the display.
Moreover, if the quality of display is inadequate even after High Power mode has been set, then it is necessary to
add a liquid crystal drive power supply externally (Vout or V0 or V1 / V2 / V3 / V4).
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
VDD
VDD
VCI
VCI
V4
C1
When using internal regulator
VCI
VCI
S6B0724
REFERENCE CIRCUIT EXAMPLES
resistors When not using internal regulator resistors
V
C1
C1
C1
C2 - +
C2 - +
C2 - +
C2 - +
C2 - +
SS
MS INTRS
SS
V
VOUT
C4+
C3+
C1C1+
C2+
C2VR
V0
V1
V2
V3
V4
V
C1
C1
C1
C1
Ra
C2 - +
C2 - +
C2 - +
C2 - +
C2 - +
SS
MS INTRS
SS
V
VOUT
C4+
C3+
C1C1+
C2+
C2VR
Rb
V0
V1
V2
V3
V
SS
Figure 17. When Using all Internal LCD Power Circuits (VCI = VDD, 4-time V/C: ON, V/R: ON, V/F: ON)
When using internal regulator resistors When not using internal regulator resistors
V
DD
V
DD
VSS
VSS
External
Power
Supply
C2 - +
C2 - +
C2 - +
C2 - +
C2 - +
MS INTRS
VOUT
C4+
C3+
C1C1+
C2+
C2-
VR
V0
V1
V2
V3
V4
VSS
External
Power
Supply
Ra
C2 - +
C2 - +
C2 - +
C2 - +
C2 - +
MS INTRS
VOUT
C4+
C3+
C1C1+
C2+
C2-
VR
Rb
V0
V1
V2
V3
V4
Figure 18. When Using some Internal LCD Power Circuits (VCI = VDD, V/C: OFF, V/R: ON, V/F: ON)
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
MS INTRS
VCI
VCI
LCD
DD
V
VOUT
C4+
C3+
C1-
External
Power
Supply
C1+
C2+
C2-
VR
V0
V1
V2
V3
V4
V
C2 - +
C2 - +
C2 - +
C2 - +
C2 - +
SS
Figure 19. When Using some Internal LCD Power Circuits (VCI = VDD, V/C: OFF, V/R: OFF, V/F: ON)
DD
V
MS INTRS
VOUT
C4+
C3+
VSS
External
Power
Supply
C1C1+
C2+
C2-
VR
V0
V1
V2
V3
V4
Value of external Capacitance
Item Value Unit
C1 1.0 to 4.7
µF
C2 0.47 to 1.0
Figure 20. When Not Using any Internal LCD Power Supply Circuits
(VCI = VDD, V/C: OFF, V/R: OFF, V/F: OFF)
* C1 and C2 are determined by the size of the LCD being driven.
Select a value that will stabilize the liquid crystal drive voltage.
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
RESET CIRCUIT
Setting RESETB to "L" or Reset instruction can initialize internal function.
When RESETB becomes "L", following procedure is occurred.
Display ON / OFF: OFF
Entire display ON / OFF: OFF (normal)
ADC select: OFF (normal)
Reverse display ON / OFF: OFF (normal)
Power control register (VC, VR, VF) = (0, 0, 0)
Serial interface internal register data clear
LCD bias ratio: 1/9 (1/65 duty), 1/8 (1/55 duty), 1/8 (1/49 duty), 1/6 (1/33 duty)
On-chip oscillator OFF
Power save release
Read-modify-write: OFF
SHL select: OFF (normal)
Static indicator mode: OFF
Static indicator register: (S1, S0) = (0, 0)
Display start line: 0 (first)
Column address: 0
Page address: 0
Regulator resistor select register: (R2, R1, R0) = (1, 0, 0)
Reference voltage set: OFF
Reference voltage control register: (SV5, SV4, SV3, SV2, SV1, SV0) = (1, 0, 0, 0, 0, 0)
Test mode release
When RESET instruction is issued, following procedure is occurred.
Read-modify-write: OFF
Static indicator mode: OFF
Static indicator register: (S1, S0) = (0, 0)
SHL select: 0
Display start line: 0 (first)
Column address: 0
Page address: 0
Regulator resistor select register: (R2, R1, R0) = (1, 0, 0)
Reference voltage set: OFF
Reference voltage control register: (SV5, SV4, SV3, SV2, SV1, SV0) = (1, 0, 0, 0, 0, 0)
Test mode release
While RESETB is "L" or Reset instruction is executed, no instruction except read status could be accepted. Reset
status appears at DB4. After DB4 becomes "L", any instruction can be accepted. RESETB must be connected to
the reset pin of the MPU, and initialize the MPU and this LSI at the same time. The initialization by RESETB is
essential before used.
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
INSTRUCTION DESCRIPTION
Table 18. Instruction Table
×: Don't care
Instruction
Display ON / OFF 0 0 1 0 1 0 1 1 1
Initial display line 0 0 0 1 ST5 ST4 ST3 ST2 ST1 ST0 Specify DDRAM line for COM0
Set page address 0 0 1 0 1 1 P3 P2 P1 P0 Set page address
Set column address MSB 0 0 0 0 0 1 Y7 Y6 Y5 Y4 Set column address MSB
Set column address LSB 0 0 0 0 0 0 Y3 Y2 Y1 Y0 Set column address LSB
Read status 0 1
Write display data 1 0 Write data Write data into DDRAM
Read display data 1 1 Read data Read data from DDRAM
ADC select 0 0 1 0 1 0 0 0 0 ADC
Reverse display ON / OFF 0 0 1 0 1 0 0 1 1 REV
Entire display ON / OFF 0 0 1 0 1 0 0 1 0 EON
LCD bias select 0 0 1 0 1 0 0 0 1
Set modify-read 0 0 1 1 1 0 0 0 0 0 Set modify-read mode
Reset modify-read 0 0 1 1 1 0 1 1 1 0 release modify-read mode
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
DON
BUSY
ADC
ON/OFF
RESETB
0 0 0 0 Read the internal status
BIAS
Description
Turn on/off LCD panel
When DON = 0: display OFF
When DON = 1: display ON
Select SEG output direction
When ADC = 0: normal direction
(SEG0→SEG131)
When ADC = 1: reverse
direction (SEG131→SEG0)
Select normal / reverse display
When REV = 0: normal display
When REV = 1: reverse display
Select normal/entire display ON
When EON = 0: normal display.
When EON = 1: entire display
ON
Select LCD bias
Reset 0 0 1 1 1 0 0 0 1 0 Initialize the internal functions
Select COM output direction
SHL select 0 0 1 1 0 0 SHL
Power control 0 0 0 0 1 0 1 VC VR VF Control power circuit operation
Regulator resistor select 0 0 0 0 1 0 0 R2 R1 R0
Set reference voltage
mode
Set reference voltage
register
Set static indicator mode 0 0 1 0 1 0 1 1 0 SM Set static indicator mode
Set static indicator register 0 0
Power save - - - - - - - - - -
0 0 1 0 0 0 0 0 0 1 Set reference voltage mode
0 0
× ×
× × × × × ×
SV5 SV4 SV3 SV2 SV1 SV0 Set reference voltage register
× × ×
S1 S0 Set static indicator register
When SHL = 0: normal direction
(COM0→COM63)
When SHL = 1: reverse direction
(COM63→COM0)
Select internal resistance ratio of
the regulator resistor
Compound Instruction of display
OFF and entire display ON
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Table 18. Instruction Table (Continued)
×: Don't care
Instruction
NOP 0 0 1 1 1 0 0 0 1 1
Test Instruction_1 0 0 1 1 1 1
Test Instruction_2 0 0 1 0 0 1
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
× × × ×
× × × ×
Description
Non-Operation command
Don’t use this instruction
Don’t use this instruction
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Display ON / OFF
Turns the Display ON or OFF
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 0 1 1 1 DON
DON = 1: display ON
DON = 0: display OFF
Initial Display Line
Sets the line address of display RAM to determine the Initial Display Line. The RAM display data is displayed
at the top row (COM0 when SHL = L, COM63 when SHL = H) of LCD panel.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 1 ST5 ST4 ST3 ST2 ST1 ST0
ST5 ST4 ST3 ST2 ST1 ST0 Line address
0 0 0 0 0 0 0
0 0 0 0 0 1 1
: : : : : : :
1 1 1 1 1 0 62
1 1 1 1 1 1 63
Set Page Address
Sets the Page Address of display data RAM from the microprocessor into the Page Address register. Any
RAM data bit can be accessed when its Page Address and column address are specified. Along with the
column address, the Page Address defines the address of the display RAM to write or read display data.
Changing the Page Address doesn't effect to the display status.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 1 P3 P2 P1 P0
P3 P2 P1 P0 Page
0 0 0 0 0
0 0 0 1 1
: : : : :
0 1 1 1 7
1 0 0 0 8
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Set Column Address
Sets the Column Address of display RAM from the microprocessor into the Column Address register. Along
with the Column Address, the Column Address defines the address of the display RAM to write or read
display data. When the microprocessor reads or writes display data to or from display RAM, Column
Addresses are automatically increased.
Set Column Address MSB
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 1 Y7 Y6 Y5 Y4
Set Column Address LSB
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 0 0 Y3 Y2 Y1 Y0
Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 Column address
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 1
: : : : : : : : :
1 0 0 0 0 0 1 0 130
1 0 0 0 0 0 1 1 131
Read Status
Indicates the internal status of the S6B0724
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 1 BUSY ADC ON / OFF RESETB 0 0 0 0
Flag Description
The device is busy when internal operation or reset. Any instruction is rejected until
BUSY
BUSY goes Low.
0: chip is active, 1: chip is being busy.
ADC
ON / OFF
RESETB
Indicates the relationship between RAM column address and segment driver
0: reverse direction (SEG131 → SEG0), 1: normal direction (SEG0 → SEG131)
Indicates display ON / OFF status
0: display ON, 1: display OFF
Indicates the initialization is in progress by RESETB signal
0: chip is active, 1: chip is being reset
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Write Display Data
8-bit data of display data from the microprocessor can be written to the RAM location specified by the column
address and page address. The column address is increased by 1 automatically so that the microprocessor
can continuously write data to the addressed page.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
1 0 Write data
Set Page Address
Set Column Address
Data Write
Column = Column + 1
Data Write Continue ?
NO
Optional Status
YES
Set Page Address
Set Column Address
Dummy Data Read
Column = Column + 1
Data Read
Column = Column + 1
Data Read Continue ?
NO
Optional Status
YES
Figure 21. Sequence for Writing Display Data Figure 22. Sequence for Reading Display Data
Data Read Display Data
8-bit data from display data RAM specified by the column address and page address can be read by this
instruction. As the column address is increased by 1 automatically after each this instruction, the
microprocessor can continuously read data from the addressed page. A dummy read is required after loading
an address into the column address register. Display data cannot be read through the serial interface.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
1 1 Read data
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
ADC Select (Segment Driver Direction Select)
Changes the relationship between RAM column address and segment driver. The direction of segment driver
output pins can be reversed by software. This makes IC layout flexible in LCD module assembly.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 0 0 0 0 ADC
ADC = 0: normal direction (SEG0 → SEG131)
ADC = 1: reverse direction (SEG131 → SEG0)
Reverse Display ON / OFF
Reverses the display status on LCD panel without rewriting the contents of the display data RAM.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 0 0 1 1 REV
REV RAM bit data = "1" RAM bit data = "0"
0 (normal) LCD pixel is illuminated LCD pixel is not illuminated
1 (reverse) LCD pixel is not illuminated LCD pixel is illuminated
Entire Display ON / OFF
Forces the whole LCD points to be turned on regardless of the contents of the display data RAM. At this time,
the contents of the display data RAM are held. This instruction has priority over the reverse display ON / OFF
instruction.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 0 0 1 0 EON
EON = 0: normal display
EON = 1: entire display ON
Select LCD Bias
Selects LCD bias ratio of the voltage required for driving the LCD.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 0 0 0 1 Bias
Duty
ratio
DUTY1 DUTY0
Bias = 0 Bias = 1
LCD bias
1/33 0 0 1/6 1/5
1/49 0 1 1/8 1/6
1/55 1 0 1/8 1/6
38
1/65 1 1 1/9 1/7
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Set Modify-Read
This instruction stops the automatic increment of the column address by the read display data instruction, but
the column address is still increased by the write display data instruction. And it reduces the load of
microprocessor when the data of a specific area is repeatedly changed during cursor blinking or others. This
mode is canceled by the reset Modify-read instruction.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 1 1 0 0 0 0 0
Reset Modify-Read
This instruction cancels the Modify-read mode, and makes the column address return to its initial value just
before the set Modify-read instruction is started.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 1 1 0 1 1 1 0
NO
Set Page Address
Set Column Address (N)
Set Modify-Read
Dummy Read
Data Read
Data Process
Data Write
Change Complete ?
YES
Reset Modify-Read
Return Column Address (N)
Figure 23. Sequence for Cursor Display
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Reset
This instruction resets initial display line, column address, page address, and common output status select to
their initial status, but dose not affect the contents of display data RAM. This instruction cannot initialize the
LCD power supply, which is initialized by the RESETB pin.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 1 1 0 0 0 1 0
SHL Select (Common Output Mode Select)
COM output scanning direction is selected by this instruction which determines the LCD driver output status.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 1 0 0 SHL
× × ×
×: Don’t care
SHL = 0: normal direction (COM0 → COM63)
SHL = 1: reverse direction (COM63 → COM0)
Power Control
Selects one of eight power circuit functions by using 3-bit register. An external power supply and part of
internal power supply functions can be used simultaneously.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 0 1 VC VR VF
VC VR VF Status of internal power supply circuits
0
1
0
1
0
1
Internal voltage converter circuit is OFF
Internal voltage converter circuit is ON
Internal voltage regulator circuit is OFF
Internal voltage regulator circuit is ON
Internal voltage follower circuit is OFF
Internal voltage follower circuit is ON
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Regulator Resistor Select
Selects resistance ratio of the internal resistor used in the internal voltage regulator. See voltage regulator
section in power supply circuit. Refer to the table 15.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 0 0 R2 R1 R0
R2 R1 R0 (1 + Rb / Ra) ratio
0 0 0 3.0
0 0 1 3.5
0 1 0 4.0
0 1 1 4.5
1 0 0 5.0 (default)
1 0 1 5.5
1 1 0 6.0
1 1 1 6.4
Reference Voltage Select
Consists of 2-byte instruction. The 1st instruction sets reference voltage mode, the 2nd one updates the
contents of reference voltage register. After second instruction, reference voltage mode is released.
The 1st Instruction: Set Reference Voltage Select Mode
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 0 0 0 0 0 1
The 2nd Instruction: Set Reference Voltage Register
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0
× ×
SV5 SV4 SV3 SV2 SV1 SV0
0 0 0 0 0 0 0
SV5 SV4 SV3 SV2 SV1 SV0
Reference voltage
parameter (αα)
V0 Contrast
Minimum
0 0 0 0 0 1 1
:
:
1 0 0 0 0 0 32 (default)
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
1 1 1 1 1 0 62
1 1 1 1 1 1 63
Maximum
Low
:
:
:
:
:
High
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Setting Reference Voltage Start
1st Instruction for Mode Setting
2nd Instruction for Register Setting
Setting Reference Voltage End
Figure 24. Sequence for Setting the Reference Voltage
Set Static Indicator State
Consists of two bytes instruction. The first byte instruction (set Static Indicator mode) enables the second
byte instruction (set Static Indicator register) to be valid. The first byte sets the Static Indicator ON / OFF.
When it is ON, the second byte updates the contents of Static Indicator register without issuing any other
instruction and this Static Indicator state is released after setting the data of indicator register.
The 1st Instruction: Set Static Indicator Mode (ON / OFF)
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 1 0 1 1 0 SM
SM = 0: static indicator OFF
SM = 1: static indicator ON
The 2nd Instruction: Set Static Indicator Register
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0
× × × × × ×
S1 S0
S1 S0 Status of static indicator output
0 0 OFF
0 1 ON (about 1 second blinking)
1 0 ON (about 0.5 second blinking)
1 1 ON (always ON)
NOP
Non Operation Instruction
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 1 1 0 0 0 1 1
Test Instruction (Test Instruction_1 & Test Instruction_2)
These are the instruction for IC chip testing. Please do not use it. If the Test Instruction is used by accident, it
can be cleared by applying “0” signal to the RESETB input pin or the reset instruction.
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 1 1 1
0 0 1 0 0 1
× × × ×
× × × ×
42
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Power Save (Compound Instruction)
If the entire display ON / OFF instruction is issued during the display OFF state, S6B0724 enters the Power
Save status to reduce the power consumption to the static power consumption value. According to the status
of static indicator mode, Power Save is entered to one mode of sleep and standby mode. When Static
Indicator mode is ON, standby mode is issued. When OFF, sleep mode is issued. Power Save mode is
released by the entire display OFF instruction.
Static Indicator OFF Static Indicator ON
[LCD Power Supply Circuit: OFF]
[All COM / SEG Outputs: VSS]
[Consumption Current: <2uA]
Power Save OFF (Compound Instruction)
− Sleep Mode
Power Save (Compound Instruction)
Sleep Mode
[Oscillator Circuit: OFF]
[Entire Display OFF]
[Static Indicator ON]
2 Bytes Command
Release Sleep Mode Release Standby Mode
[Display OFF]
[Entire Display ON]
Standby Mode
[Oscillator Circuit: ON]
[LCD Power Supply Circuit: OFF]
[All COM / SEG Outputs: VSS]
[Consumption Current: <10uA]
Power Save OFF
[Entire Display OFF]
Figure 25. Power Save (Compound Instruction)
This stops all operations in the LCD display system, and as long as there are no access from the MPU, the
consumption current is reduced to a value near the static current. The internal modes during sleep mode
are as follows:
a. The oscillator circuit and the LCD power supply circuit are halted.
b. All liquid crystal drive circuits are halted, and the segment in common drive outputs output a VSS level.
− Standby Mode
The duty LCD display system operations are halted and only the static drive system for the indicator
continues to operate, providing the minimum required consumption current for the static drive.
The internal modes are in the following states during standby mode.
a. The LCD power supply circuits are halted. The oscillator circuit continues to operate.
b. The duty drive system liquid crystal drive circuits are halted and the segment and common driver outputs
a VSS level. The static drive system does not operate.
When a reset command is performed while in standby mode, the system enters sleep mode.
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Referential Instruction Setup Flow (1)
User System Setup by External Pins
Start of Initialization
Power ON (VDD - VSS) Keeping the RESETB Pin = “L”
Waiting for Stabilizing the Power
RESETB Pin = “H”
User Application Setup by Internal Instructions
[ADC Select]
[SHL Select]
[LCD Bias Select]
User LCD Power Setup by Internal Instructions
[Voltage Converter ON]
Waiting for ≥ 1ms
User LCD Power Setup by Internal Instructions
[Voltage Regulator ON]
Waiting for ≥ 1ms
User LCD Power Setup by Internal Instructions
[Voltage Follower ON]
User LCD Power Setup by Internal Instructions
[Regulator Resistor Select]
[Reference Voltage Register Set]
Waiting for Stabilizing the LCD Power Levels
End of Initialization
Figure 26. Initializing with the Built-in Power Supply Circuits
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Referential Instruction Setup Flow (2)
User System Setup by External Pins
Start of Initialization
Power ON (VDD - VSS) Keeping the RESETB Pin = “L”
Waiting for Stabilizing the Power
RESETB Pin = “H”
Set Power Save
User Application Setup by Internal Instructions
[ADC Select]
[SHL Select]
[LCD Bias Select]
User LCD Power Setup by Internal Instructions
[Regulator Resistor Select]
[Reference Voltage Register Set]
Release Power Save
Waiting for Stabilizing the LCD Power Levels
End of Initialization
Figure 27. Initializing without the Built-in Power Supply Circuits
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Referential Instruction Setup Flow (3)
End of Initialization
Display Data RAM Addressing by Instruction
[Initial Display Line]
[Set Page Address]
[Set Column Address]
Write Display ON / OFF by Instruction
[Display ON / OFF]
Turn Display ON / OFF by Instruction
[Display ON / OFF]
End of Data Display
Figure 28. Data Displaying
46
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
Waiting for ≥ 1ms
Waiting for ≥ 1ms
LCD
Referential Instruction Setup Flow (4)
Optional Status
Turn Display ON /OFF by Instruction
[Display OFF]
User LCD Power Setup by Internal Instructions
[Voltage Regulator OFF]
Waiting for ≥ 50ms
User LCD Power Setup by Internal Instructions
[Voltage Follower OFF]
User LCD Power Setup by Internal Instructions
[Voltage Converter OFF]
Power OFF (VDD-VSS)
Figure 29. Power OFF
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Table 19. Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply voltage range
VDD - 0.3 to +7.0 V
VLCD - 0.3 to +17.0 V
Input voltage range VIN - 0.3 to VDD + 0.3 V
Operating temperature range TOPR - 40 to +85
Storage temperature range TSTR - 55 to +125
NOTES:
1. VDD and VLCD are based on VSS = 0V.
2. Voltages V0 ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ VSS must always be satisfied.(VLCD = V0 – VSS)
3. If supply voltage exceeds its absolute maximum range, this LSI may be damaged permanently.
It is desirable to use this LSI under electrical characteristic conditions during general operation.
Otherwise, this LSI may malfunction or reduced LSI reliability may result.
°C
°C
48
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
DC CHARACTERISTICS
Table 20. DC Characteristics
(VSS = 0V, VDD = 2.4 to 3.6V, Ta = -40 to 85°C)
Item Symbol Condition Min. Typ. Max. Unit Pin used
Operating voltage (1) VDD 2.4 - 3.6 V VDD *1
Operating voltage (2) V0 4.5 - 15.0 V V0 *2
Input voltage
High VIH 0.8VDD - VDD
Low VIL VSS - 0.2VDD
Output
voltage
High VOH IOH = -0.5mA 0.8VDD - VDD
Low VOL IOL = 0.5mA VSS - 0.2VDD
Input leakage current IIL VIN = VDD or VSS - 1.0 - + 1.0
Output leakage current IOZ VIN = VDD or VSS - 3.0 - + 3.0
LCD driver ON
resistance
Oscillator
frequency
Internal
External
Voltage converter
input voltage
Voltage converter
output voltage
Voltage regulator
operating voltage
Voltage follower
operating voltage
Reference voltage VREF
RON Ta = 25°C, V0 = 8V - 2.0 3.0 kΩ
fOSC 32.7 43.6 54.5
fCL
Ta = 25°C
Duty ratio = 1/65
× 2
× 3
4.09 5.45 6.81
2.4 - 3.6
2.4 - 3.6
VCI
× 4
× 5
2.4 - 3.6
2.4 - 3.2
×2 / ×3 / ×4 / ×5
VOUT
voltage conversion
95 99 - % VOUT
(no-load )
VOUT 6.0 - 16.0 V VOUT
V0 4.5 - 15.0 V V0 *9
Ta = 25°C - 0.05%/°C
2.04 2.1 2.16 V *10
V *3
V *4
µA
µA
SEGn
COMn *7
kHz
CL *8
V VCI
*5
*6
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
Dynamic Current Consumption (1) when the Built-in Power Circuit is OFF (At Operate Mode)
(Ta = 25°C)
Item Symbol Condition Min. Typ. Max. Unit Pin used
Dynamic current
consumption (1)
IDD1
VDD = 3.0V
V0 – VSS = 11.0V
1/65 duty ratio
- 15 23 µΑ *11
Display pattern OFF
Dynamic Current Consumption (2) when the Built-in Power Circuit is ON (At Operate Mode)
(Ta = 25°C)
Item Symbol Condition Min. Typ. Max. Unit Pin used
VDD = 3.0V,
(VCI = VDD, 4 times boosting)
V0 – VSS = 11.0V,
1/65 duty ratio,
- 40 60
Display pattern OFF,
Dynamic current
Normal power mode
consumption (2) IDD2
VDD = 3.0V,
(VCI = VDD, 4 times boosting)
V0 – VSS = 11.0V,
1/65 duty ratio,
- 150 200
Display pattern checker,
Normal power mode
µΑ
µΑ
*12
*12
Current Consumption during Power Save Mode
Item Symbol Condition Min. Typ. Max. Unit Pin used
Sleep mode
current
Standby mode
current
IDDS1
IDDS2 During standby - - 10.0
During sleep
(Ta = 25°C)
- - 2.0 µA
µA
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Table 21. The Relationship between Oscillation Frequency and Frame Frequency
Duty ratio Item fCL fFR
1/65
1/55
1/49
1/33
On-chip oscillator circuit is
used
On-chip oscillator circuit is
not used
On-chip oscillator circuit is
used
On-chip oscillator circuit is
not used
On-chip oscillator circuit is
used
On-chip oscillator circuit is
not used
On-chip oscillator circuit is
used
On-chip oscillator circuit is
not used
fOSC
8
External input (fCL)
fOSC
9
External input (fCL)
fOSC
10
External input (fCL)
fOSC
15
External input (fCL)
fOSC
2 × 8 × 65
fOSC
2 × 65
fOSC
2 × 9 × 55
fOSC
2 × 55
fOSC
2 × 10 × 49
fOSC
2 × 49
fOSC
2 × 15 × 33
fOSC
2 × 33
(fOSC: oscillation frequency, fCL: display clock frequency, fFR: LCD AC signal frequency)
[* Remark Solves]
*1. Though the wide range of operating voltages is guaranteed, a spike voltage change may affect the voltage
assurance during access from the MPU.
*2. In case of external power supply is applied.
*3. CS1B, CS2, RS, DB0 to DB7, E_RDB, RW_WRB, RESETB, MS, C68, PS, INTRS, HPMB, CLS, CL, M, FR,
DISP pins.
*4. DB0 to DB7, M, FR, DISP, CL pins.
*5. CS1B, CS2, RS, DB[7:0], E_RDB, RW_WRB, RESETB, MS, C68, PS, INTRS, HPMB, CLS, CL, M, FR, DISP
pins.
*6. Applies when the DB[7:0], M, FR, DISP, and CL pins are in high impedance.
*7. Resistance value when ± 0.1[mA] is applied during the ON status of the output pin SEGn or COMn.
RON= ∆V / 0.1 [kΩ] (∆V: voltage change when ± 0.1[mA] is applied in the ON status.)
*8. See table 21 for the relationship between oscillation frequency and frame frequency.
*9. The voltage regulator circuit adjusts V0 within the voltage follower operating voltage range
*10. On-chip reference voltage source of the voltage regulator circuit to adjust V0.
*11,12. Applies to the case where the on-chip oscillation circuit is used and no access is made from the MPU.
The current consumption, when the built-in power supply circuit is ON or OFF.
The current flowing through voltage regulation resistors (Ra and Rb) is not included.
It does not include the current of the LCD panel capacity, wiring capacity, etc.
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
t
t
t
t
0.9V
0.1V
t
, t
t
t
t
S6B0724
AC CHARACTERISTICS
Read / Write Characteristics (8080-series MPU)
RS
CS1B
(CS2=1)
RDB, WRB
DB0 to DB7
(Write)
DB0 to DB7
(Read)
AS80
DD
PW80(R)
DD
ACC80
PW80(W)
DS80
AH80
CY80
DH80
OD80
Figure 30. Read / Write Characteristics (8080-series MPU)
(VDD = 2.4 to 3.6V, Ta = -40 to +85°C)
Item Signal Symbol Min. Typ. Max. Unit Remark
Address setup time
Address hold time
RS
tAS80
tAH80
0
0
- - ns
System cycle time RS tCY80 300 - - ns
Pulse width (WRB) RW_WRB tPW80(W) 60 - - ns
Pulse width (RDB) E_RDB tPW80(R) 60 - - ns
Data setup time
Data hold time
Read access time
Output disable time
52
DB7
to
DB0
tDS80
tDH80
tACC80
tOD80
40
15
10
- - ns
-
-
140
100
ns CL = 100 pF
Page 57
S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
LCD
Read / Write Characteristics (6800-series Microprocessor)
RS
tAH68tAS68
CS1B
(CS2=1)
tCY68
tPW68(R), tPW68(W)
E
0.9VDD0.1VDD
tDS68
tDH68
DB0 to DB7
(Write)
tACC68
tOD68
DB0 to DB7
(Read)
Figure 31. Read / Write Characteristics (6800-series Microprocessor)
(VDD = 2.4 to 3.6V, Ta = -40 to +85°C)
Item Signal Symbol Min. Typ. Max. Unit Remark
Address setup time
Address hold time
RS
tAS68
tAH68
0
0
- - ns
System cycle time RS tCY68 300 - - ns
Data setup time
Data hold time
Access time
Output disable time
Enable pulse
width
Read
Write
DB7
to
DB0
E_RDB
tDS68
tDH68
tACC68
tOD68
tPW68(R)
tPW68(W)
40
15
-
10
120
60
- - ns
-
140
100
- - -
ns CL = 100 pF
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
t
t
S6B0724
Serial Interface Characteristics
tCHStCSS
CS1B
(CS2 = 1)
tAHStASS
RS
tCYS
DB6
(SCLK)
0.9VDD
0.1VDD
tWLS
tWHS
DB7
(SID)
Item Signal Symbol Min. Typ. Max. Unit Remark
Serial clock cycle
SCLK high pulse width
SCLK low pulse width
Address setup time
Address hold time
Data setup time
Data hold time
CS1B setup time
CS1B hold time
DSS
Figure 32. Serial Interface Characteristics
DB6
(SCLK)
RS
DB7
(SID)
CS1B
tCYS
tWHS
tWLS
tASS
tAHS
tDSS
tDHS
tCSS
tCHS
250
100
100
150
150
100
100
150
150
-
-
-
-
-
-
-
-
-
DHS
(VDD = 2.4 to 3.6V, Ta = -40 to +85°C)
-
-
ns
-
-
-
-
-
-
-
ns
ns
ns
54
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
t
LCD
Reset Input Timing
tRW
RESETB
tR
Internal
status
During reset Reset complete
Figure 33. Reset Input Timing
Item Signal Symbol Min.
Typ.
Reset low pulse width RESETB tRW 1.0 - -
Reset time - tR - - 1.0
Display Control Output Timing
CL
(OUT)
(VDD = 2.4 to 3.6V, Ta = -40 to +85°C)
Max. Unit
Remark
µs
µs
DFR
FR
Figure 34. Display Control Output Timing
(VDD = 2.4 to 3.6V, Ta = -40 to +85°C)
Item Signal Symbol Min.
Typ.
Max. Unit
Remark
FR delay time FR tDFR - 20 80 ns CL = 50 pF
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
DB0 to DB7
RESETB
V
RWERS
CS2
CS1B
DB0 to DB7
RESETB
VDDV
RS
CS2
CS1B
OPEN
RESETB
V
VDD or V
SCLK
SIDRSCS2
CS1B
S6B0724
REFERENCE APPLICATIONS
MICROPROCESSOR INTERFACE
In Case of Interfacing with 6800-series (PS = "H", C68 = "H")
CS1B
CS2
6800-series
MPU
DD
V
DD
Figure 35. Interfacing with 6800-series (PS = "H", C68 = "H")
In Case of Interfacing with 8080-series (PS = "H", C68 = "L")
RS
E_RDB
RW_WRB
DB0 to DB7
RESETB
C68
PS
S6B0724
8080-series
MPU
RDB
WRB
Figure 36. Interfacing with 8080-series (PS = "H", C68 = "L")
In Case of Serial Interface (PS = "L", C68 = "H or L")
MPU
SS
SS
SS
CS1B
CS2
RS
E_RDB
RW_WRB
DB0 to DB7
RESETB
C68
PS
CS1B
CS2
RS
DB7(SID)
DB6(SCLK)
RESETB
DB0 to DB5
C68
PS
S6B0724
S6B0724
Figure 37. Serial Interface (PS = "L", C68 = "H or L")
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
SEG0 ........... SEG131
SEG131 ............ SEG0
LCD
CONNECTIONS BETWEEN S6B0724 AND LCD PANEL
Single Chip Structure (1/65 Duty Configurations)
♣ ♦ ♥ ♠ Ξ
64 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG0 ........... SEG131
COMS
COM0
:
COM31
S6B0724
(Bottom View)
COM32
:
COM63
COMS
♣ ♦ ♥ ♠ Ξ
64 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG131 ........... SEG0
COM32
:
COM63
COMS
S6B0724
(Top View)
Figure 38. SHL = 1, ADC = 0 Figure 39. SHL = 1, ADC = 1
COM31
:
COM0
COMS
S6B0724
(Top View)
COMS
COM63
:
COM32
COMS
COM63
:
COM32
S6B0724
(Bottom View)
COMS
COM0
:
COM31
COM31
:
COM0
COMS
♣ ♦ ♥ ♠ Ξ
♣ ♦ ♥ ♠ Ξ
64 × 132 pixels 64 × 132 pixels
♣ ♦ ♥ ♠ Ξ
♣ ♦ ♥ ♠ Ξ
Figure 40. SHL = 0, ADC = 0 Figure 41. SHL = 0, ADC = 1
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
SEG0 ........... SEG131
SEG131 ............ SEG0
S6B0724
Single Chip Structure (1/55 Duty Configurations)
♣ ♦ ♥ ♠ Ξ
54 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG0 ........... SEG131
COMS
COM0
:
COM26
S6B0724
(Bottom View)
COM37
:
COM63
COMS
♣ ♦ ♥ ♠ Ξ
54 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG131 ........... SEG0
COM37
:
COM63
COMS
S6B0724
(Top View)
Figure 42. SHL = 1, ADC = 0 Figure 43. SHL = 1, ADC = 1
COM26
:
COM0
COMS
S6B0724
(Top View)
COMS
COM63
:
COM37
COMS
COM63
:
COM37
S6B0724
(Bottom View)
COMS
COM0
:
COM26
COM26
:
COM0
COMS
♣ ♦ ♥ ♠ Ξ
54 × 132 pixels
♣ ♦ ♥ ♠ Ξ
♣ ♦ ♥ ♠ Ξ
54 × 132 pixels
♣ ♦ ♥ ♠ Ξ
Figure 44. SHL = 0, ADC = 0 Figure 45. SHL = 0, ADC = 1
58
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
SEG0 ........... SEG131
SEG131 ............ SEG0
LCD
Single Chip Structure (1/49 Duty Configurations)
♣ ♦ ♥ ♠ Ξ
48 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG0 ........... SEG131
COMS
COM0
:
COM23
S6B0724
(Bottom View)
COM40
:
COM63
COMS
♣ ♦ ♥ ♠ Ξ
48 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG131 ........... SEG0
COM40
:
COM63
COMS
S6B0724
(Top View)
Figure 46. SHL = 1, ADC = 0 Figure 47. SHL = 1, ADC = 1
COM23
:
COM0
COMS
S6B0724
(Top View)
COMS
COM63
:
COM40
COMS
COM63
:
COM40
S6B0724
(Bottom View)
COMS
COM0
:
COM23
COM23
:
COM0
COMS
♣ ♦ ♥ ♠ Ξ
48 × 132 pixels
♣ ♦ ♥ ♠ Ξ
♣ ♦ ♥ ♠ Ξ
48 × 132 pixels
♣ ♦ ♥ ♠ Ξ
Figure 48. SHL = 0, ADC = 0 Figure 49. SHL = 0, ADC = 1
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132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
SEG0 ........... SEG131
SEG131 ............ SEG0
S6B0724
Single Chip Structure (1/33 Duty Configurations)
♣ ♦ ♥ ♠ Ξ
32 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG0 ........... SEG131
COMS
COM0
:
COM15
S6B0724
(Bottom View)
COM48
:
COM63
COMS
♣ ♦ ♥ ♠ Ξ
32 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG131 ........... SEG0
COM48
:
COM63
COMS
S6B0724
(Top View)
Figure 50. SHL = 1, ADC = 0 Figure 51. SHL = 1, ADC = 1
COM15
:
COM0
COMS
S6B0724
(Top View)
COMS
COM63
:
COM48
COMS
COM63
:
COM48
S6B0724
(Bottom View)
COMS
COM0
:
COM15
COM15
:
COM0
COMS
♣ ♦ ♥ ♠ Ξ
32 × 132 pixels
♣ ♦ ♥ ♠ Ξ
♣ ♦ ♥ ♠ Ξ
32 × 132 pixels
♣ ♦ ♥ ♠ Ξ
Figure 52. SHL = 0, ADC = 0 Figure 53. SHL = 0, ADC = 1
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S6B0724 PRELIMINARY SPEC. VER. 0.9 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN
SEG131 ............... SEG0
SEG131 ............... SEG0
SEG0 ................... SEG131
SEG0 ................... SEG131
LCD
Multiple Chip Structure
- 65COM (64COM + 1COMS) ×× 264SEG (132SEG ×× 2)
♣ ♦ ♥ ♠ Ξ
64 × 264 pixels
♣ ♦ ♥ ♠ Ξ
COM32
:
COM63
COMS
COM31
:
COM0
COMS
S6B0724
(Top View)
(Master)
COMS
COM0
:
COM31
COM32
:
COM63
COMS
S6B0724
(Top View)
(Slave)
Figure 54. SHL = 1, ADC = 1
♦ Connect the following pins of two chips each other:
- Display clock pins: CL, M
- Display control pin: DISP
- LCD power pins: V0, V1, V2, V3, V4
S6B0724
(Top View)
(Master)
COMS
COM63
:
COM32
♣ ♦ ♥ ♠ Ξ
COM31
:
COM0
COMS
S6B0724
(Top View)
(Slave)
COMS
COM0
:
COM31
COMS
COM63
:
COM32
64 × 264 pixels
♣ ♦ ♥ ♠ Ξ
Figure 55. SHL = 0, ADC = 0
♦ Connect the following pins of two chips each other:
- Display clock pins: CL, M
- Display control pin: DISP
- LCD power pins: V0, V1, V2, V3, V4
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Page 66
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.9
S6B0724
- 130COM (128COM + 2COMS) ×× 132SEG
COM31
:
COM0
COMS
SEG0 ................... SEG131
♣ ♦ ♥ ♠ Ξ
S6B0724
( Top View )
( Master )
128 × 132 pixels
♣ ♦ ♥ ♠ Ξ
SEG131 ................... SEG0
COM32
:
COM63
COMS
S6B0724
( Top View )
( Slave )
COMS
COM63
:
COM32
COMS
COM0
:
COM31
Figure 56. 130COM (128COM + 2COMS) ×× 132SEG
♦ Connect the following pins of two chips each other
- Display clock pins: CL, M
- Display control pin: DISP
- LCD power pins: V0, V1, V2, V3, V4
♦ Common / Segment output direction select
- Master chip: SHL = 0, ADC = 0
- Slave chip: SHL = 1, ADC = 1
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