Samsung S6A0078 Datasheet
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
S6A0078
written permission of LCD Driver IC Team.
June. 2000.
Ver. 0.0
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
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
INTRODUCTION
S6A0078 is a dot matrix LCD driver & controller IC which is fabricated by low power CMOS technology. It can
display 1, 2, or 4 lines with 5 x 8 or 6 x 8 dots format.
FUNCTIONS
• Character type dot matrix LCD driver & controller
• Internal driver: 34 common and 120 segment signal output
• Easy interface with 4-bit or 8-bit MPU
• Clock synchronized serial interface
• 5 x 8 dots matrix possible
• 6 x 8 dots matrix possible
• Bi-directional shift function
• All character reverse display
• Display shift per line
• Voltage converter for LCD drive voltage: 13V max (2 times/3 times)
• Various instruction functions
• Automatic power on reset
FEATURES
• Internal Memory
- Character Generator ROM (CGROM): 9,600 bits (240 characters x 5 x 8 dot)
- Character Generator RAM (CGRAM): 64 x 8 bits (8 characters x 5 x 8 dot)
- Segment Icon RAM (SEGRAM): 16 x 8 bits (96 icons max.)
- Display Data RAM (DDRAM): 96 x 8 bits (96 characters max.)
• Low power operation
Power supply voltage range: 2.7 - 5.5V (VDD)
LCD drive voltage range: 3.0 - 13.0V (VDD - V5)
• CMOS process
• Programmable duty cycle: 1/17, 1/33
• Internal oscillator with an external resistor
• Bare chip available
2
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
PROGRAMMABLE DUTY CYCLES
5-dot Font Width
Display Line
Numbers
1 1/17 1 line of 48 characters 80
2 1/33 2 lines of 48 characters 80
4 1/33 4 lines of 24 characters 80
6-dot Font Width
Display Line
Numbers
1 1/17 1 line of 40 characters 96
2 1/33 2 lines of 40 characters 96
4 1/33 4 lines of 20 characters 96
Duty Ratio
Single-chip operation
Displayable Characters Possible Icons
Single-chip operation
Duty Ratio
Displayable Characters Possible Icons
3
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
BLOCK DIAGRAM
OSC1 OSC2IE
RESET
IM
RS/CS
E/SCLK
RW/SID
DB4-DB7
DB3-DB1
DB0-SOD
Power on Reset
(POR)
System
Interface
Serial
4-bit
8-bit
Input/
Output
Buffer
Instruction
8
Register
(IR)
7
Data
8 8
Register
(DR)
8
Busy Flag
Oscillator
Instruction
Decoder
Address
Counter
7
3 7 8
Timing Generator
7
Display Data
RAM (DDRAM)
96 x 8-bit
8
8
120-bit
Shift
Register
34-bit
Shift
Register
120-bit
Latch
Circuit
Common
Driver
Segment
LCD Driver
Voltage Selector
COM0COM33
COM1COM120
Driver
V5OUT2
V5OUT3
GND(VSS)
4
Vci
C1
C2
VDD
Voltage Converter
Segment
RAM
(SEGRAM)
16 bytes
Character
Generator
RAM
(CGRAM)
64 bytes
5/6
Parallel/Serial Converter and
Character
Generator
(CGROM)
9600 bits
Smooth Scroll Circuit
ROM
5
Cursor and
Blink
Controller
V1 - V5
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
DB0/SOD
PAD CONFIGURATION
SEG78
SEG77
SEG76
SEG75
SEG74
SEG73
SEG72
SEG71
SEG70
SEG69
SEG68
SEG67
SEG66
SEG65
SEG64
SEG63
SEG62
SEG61
SEG60
SEG59
SEG58
SEG57
SEG56
SEG55
SEG54
SEG53
SEG52
SEG51
SEG50
SEG49
SEG48
SEG47
SEG46
SEG45
SEG44
SEG43
183
182
181
180
179
178
177
176
175
174
173
172
171
170
169
168
167
166
165
164
163
162
161
160
159
158
157
156
155
154
153
152
151
150
149
148
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
SEG105
SEG106
SEG107
SEG108
SEG109
SEG110
SEG111
SEG112
SEG113
SEG114
SEG115
SEG116
SEG117
SEG118
SEG119
SEG120
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
COM25
COM26
COM27
COM28
COM29
COM30
COM31
COM32
COM33
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
51
52
53
54
55
56
57
58
59
S6A0078
Y
(0, 0) X
Chip size: 5340
PAD size: 100
Unit : µm
×
8740
×
100
147
146
145
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
SEG42
SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM17
COM18
COM19
COM20
COM21
COM22
COM23
COM24
6061626364656667686970717273747576777879808182838485868788
OSC1
RESET
IE
IM
VSS1
RS/CS
E/SCLK
RW/SID
DB1
DB2
DB3
DB4
DB5
DB6
DB7
Vci
C2
C1
VSS2
V5OUT2
V5V4V3V2V1
V5OUT3
DD
V
OSC2
5
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
PAD CENTER COORDINATES
Table 1. Pad Location
Pad
No.
1 SEG79 -2504 3540 33 SEG111 -2504 -459 65 IE -1125 -4119
2 SEG80 -2504 3415 34 SEG112 -2504 -584 66 VSSI -1100 -4119
3 SEG81 -2504 3290 35 SEG113 -2504 -709 67 RS/CS -875 -4119
4 SEG82 -2504 3165 36 SEG114 -2504 -834 68 RW/SID -750 -4119
5 SEG83 -2504 3040 37 SEG115 -2504 -959 69 E/SCLK -625 -4119
6 SEG84 -2504 2915 38 SEG116 -2504 -1084 70 DB0/SOD -500 -4119
7 SEG85 -2504 2790 39 SEG117 -2504 -1209 71 DB1 -375 -4119
8 SEG86 -2504 2665 40 SEG118 -2504 -1334 72 DB2 -250 -4119
9 SEG87 -2504 2540 41 SEG119 -2504 -1459 73 DB3 -125 -4119
10 SEG88 -2504 2415 42 SEG120 -2504 -1584 74 DB4 0 -4119
11 SEG89 -2504 2290 43 COM9 -2504 -1822 75 DB5 125 -4119
12 SEG90 -2504 2165 44 COM10 -2504 -1947 76 DB6 250 -4119
13 SEG91 -2504 2040 45 COM11 -2504 -2072 77 DB7 375 -4119
14 SEG92 -2504 1915 46 COM12 -2504 -2197 78 Vci 500 -4119
15 SEG93 -2504 1790 47 COM13 -2504 -2322 79 C2 625 -4119
16 SEG94 -2504 1665 48 COM14 -2504 -2447 80 C1 750 -4119
17 SEG95 -2504 1540 49 COM15 -2504 -2572 81 VSS2 875 -4119
18 SEG96 -2504 1425 50 COM16 -2504 -2697 82 V5OUT2 1000 -4119
19 SEG97 -2504 1290 51 COM25 -2504 -2822 83 V5OUT3 1125 -4119
20 SEG98 -2504 1165 52 COM26 -2504 -2947 84 V5 1250 -4119
21 SEG99 -2504 1040 53 COM27 -2504 -3072 85 V4 1375 -4119
22 SEG100 -2504 915 54 COM28 -2504 -3197 86 V3 1500 -4119
23 SEG101 -2504 790 55 COM29 -2504 -3322 87 V2 1625 -4119
24 SEG102 -2504 665 56 COM30 -2504 -3447 88 V1 1750 -4119
25 SEG103 -2504 540 57 COM31 -2504 -3572 89 COM24 2504 -3822
26 SEG104 -2504 415 58 COM32 -2504 -3697 90 COM23 2504 -3697
27 SEG105 -2504 290 59 COM33 -2504 -3822 91 COM22 2504 -3572
28 SEG106 -2504 165 60 VDD -1750 -4119 92 COM21 2504 -3447
29 SEG107 -2504 40 61 OSC2 -1625 -4119 93 COM20 2504 -3322
30 SEG108 -2504 -84 62 OSC1 -1500 -4119 94 COM19 2504 -3197
31 SEG109 -2504 -209 63 RESET -1375 -4119 95 COM18 2504 -3072
32 SEG110 -2504 -334 64 IM -1250 -4119 96 COM17 2504 -2947
Pad
Name
Coordinate Coordinate Coordinate
X Y
Pad
No.
Pad Name
X Y
Pad
No.
Pad Name
X Y
6
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
Table 1. Pad Location (Continued)
Pad
Pad Name
No.
97 COM8 2504 -2822 130 SEG25 2504 1415 163 SEG58 312 4119
98 COM7 2504 -2697 131 SEG26 2504 1540 164 SEG59 187 4119
99 COM6 2504 -2572 132 SEG27 2504 1665 165 SEG60 62 4119
100 COM5 2504 -2447 133 SEG28 2504 1790 166 SEG61 -62 4119
101 COM4 2504 -2322 134 SEG29 2504 1915 167 SEG62 -187 4119
102 COM3 2504 -2197 135 SEG30 2504 2040 168 SEG63 -312 4119
103 COM2 2504 -2072 136 SEG31 2504 2165 169 SEG64 -437 4119
104 COM1 2504 -1947 137 SEG32 2504 2290 170 SEG65 -562 4119
105 COM0 2504 -1822 138 SEG33 2504 2415 171 SEG66 -687 4119
106 SEG91 2504 -1584 139 SEG34 2504 2540 172 SEG67 -812 4119
107 SEG2 2504 -1459 140 SEG35 2504 2665 173 SEG68 -937 4119
108 SEG3 2504 -1334 141 SEG36 2504 2790 174 SEG69 -1062 4119
109 SEG4 2504 -1209 142 SEG37 2504 2915 175 SEG70 -1187 4119
110 SEG5 2504 -1084 143 SEG38 2504 3040 176 SEG71 -1312 4119
111 SEG6 2504 -959 144 SEG39 2504 3165 177 SEG72 -1437 4119
112 SEG7 2504 -834 145 SEG40 2504 3290 178 SEG73 -1562 4119
113 SEG8 2504 -709 146 SEG41 2504 3415 179 SEG74 -1687 4119
114 SEG9 2504 -584 147 SEG42 2504 3540 180 SEG75 -1812 4119
115 SEG10 2504 -459 148 SEG43 2187 4119 181 SEG76 -1937 4119
116 SEG11 2504 -334 149 SEG44 2062 4119 182 SEG77 -2062 4119
117 SEG12 2504 -209 150 SEG45 1937 4119 183 SEG78 -2187 4119
118 SEG13 2504 -84 151 SEG46 1812 4119
119 SEG14 2504 40 152 SEG47 1687 4119
120 SEG15 2504 165 153 SEG48 1562 4119
121 SEG16 2504 290 154 SEG49 1437 4119
122 SEG17 2504 415 155 SEG50 1312 4119
123 SEG18 2504 540 156 SEG51 1187 4119
124 SEG19 2504 665 157 SEG52 1062 4119
125 SEG20 2504 790 158 SEG53 937 4119
126 SEG21 2504 915 159 SEG54 812 4119
127 SEG22 2504 1040 160 SEG55 687 4119
128 SEG23 2504 1165 161 SEG56 562 4119
129 SEG24 2504 1290 162 SEG57 437 4119
Coordinate Coordinate Coordinate
X Y
Pad
No.
Pad Name
X Y
Pad
No.
Pad
Name
X Y
7
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
PAD DESCRIPTION
Table 2. Pad Description
PAD (No)
Input/
Output
Name Description Interface
VDD (60) for logical circuit (+3V, +5V)
VSS1, VSS2
(66, 81)
V1-V5
(88-84)
Power supply
0V (GND)
Bias voltage level for LCD driving.
Power supply
Input voltage to the voltage converter to
Vci (78) Input
generate LCD drive voltage
(Vci = 2.5 - 4.5V).
SEG1-SEG80
(106-183, 1-42)
COM0-COM33
(105-89, 43-59)
OSC1, OSC2
(61, 62)
C1, C2
(80, 79)
Output
Output
Input
(OSC1),
Output
(OSC2)
Input
Segment
output
Common
output
Oscillator
External
capacitance
input
Segment signal output for LCD drive. LCD
Common signal output for LCD drive. LCD
When use internal oscillator, connect
external Rf resistor.
If external clock is used, connect it to
OSC1.
To use the voltage converter (2 times/3
times), these pins must be connected to the
external capacitance.
External
resistor/oscillator
(OSC1)
External
capacitance
RESET (63) Input Reset pin Initialized to low -
When IE = "High", Instruction set is
IE (65) Input
Select pin of
instruction set
selected as Table 6.
When IE = "Low", Instruction set is selected
as Table 10.
The value of Vci is converted two times.
To use three times converter, the same
capacitance as that of C1-C2 should be
connected here.
V5 capacitance
V5OUT2 (82)
Two times
converter
output
Output
Three times
V5OUT3 (83)
converter
The value of Vci is converted three times. V5
output
IM (64) Input
Interface
mode
selection
Select Interface mode with the MPU.
When IM = "Low": Serial mode,
When IM = "High": 4-bit/8-bit bus mode.
-
-
8
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
Table 2. Pad Description (Continued)
PAD (No)
Input/
Output
RS/CS (67) Input
RW/SID (68) Input
E/SCLK (69) Input
Input
DB0/SOD (70)
Output/
Output
DB1-DB3
(71-73)
Input.
Ouptut
DB4-DB7
(74-77)
Name Description Interface
When bus mode, used as register selection
input. When RS/CS = "High", data register
Register
select/chip
select
is selected. When RS/CS = "Low",
Instruction register is selected.
When serial mode, used as chip selection
input. When RS/CS = "Low", selected.
When RS/CS = "High", not selected.
(low access enable)
When bus mode, used as read/write
Read
write/serial
input data
selection input. When RW/SID = "High",
read operation. When RW/SID = "Low",
write operation.
When serial mode, used for data input pin.
Read write
enable/serial
clock
When bus mode, used as read write enable
signal.
When serial mode, used as serial clock
input pin.
When 8-bit bus mode, used as lowest biData bus 0
bit/serial
output data
directional data bit. During 4-bit bus mode,
open this pin.
When serial mode, used as serial data
output pin. If not in read operation, open
this pin.
When 8-bit bus mode, used as low order bi-
directional data bus.
During 4-bit bus mode or serial mode, open
these pins.
Data bus 1- 7
When 8-bit bus mode, used as high order
bi-directional data bus. In case of 4-bit bus
mode, used as both high and low order.
DB7 used for Busy Flag output.
During serial mode, open these pins.
MPU
MPU
MPU
MPU
MPU
MPU
9
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
FUNCTION DESCRIPTION
SYSTEM INTERFACE
This chip has all three kinds interface type with MPU: Serial, 4-bit bus and 8-bit bus. Serial and bus (4-bit/8-bit) is
selected by IM input, and 4-bit bus and 8-bit bus is selected by DL bit in the instruction register. During read or
write operation, two 8-bit registers are used. one is data register (DR), the other is instruction register (IR). The
data register (DR) is used as temporary data storage place for being written into or read from
DDRAM/CGRAM/SEGRAM, target RAM is selected by RAM address setting instruction. Each internal operation,
reading from or writing into RAM, is done automatically. So to speak, after MPU reads DR data, the data in the
next DDRAM/CGRAM/SEGRAM address is transferred into DR automatically. Also after MPU writes data to DR,
the data in DR is transferred into DDRAM/CGRAM/SEGRAM automatically. The Instruction register (IR) is used
only to store instruction code transferred from MPU. MPU cannot use it to read instruction data. To select
register, use RS/CS input pin in 4-bit/8-bit bus mode (IM = "High") or RS bit in serial mode (IM = "Low").
RS R/W Operation
0 0 Instruction Write operation (MPU writes Instruction code into IR)
0 1 Read busy flag (DB7) and address counter (DB0-DB6)
1 0 Data write operation (MPU writes data into DR)
1 1 Data read operation (MPU reads data from DR)
BUSY FLAG (BF)
When BF = "High", it indicates that the internal operation is being processed. So during this time the next
instruction cannot be accepted. BF can be read, when RS = low and R/W = high (read instruction operation),
through DB7 Before executing the next instruction, be sure that BF is not high.
10
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
DISPLAY DATA RAM (DDRAM)
DDRAM stores display data of maximum 96 x 8 bits (96 characters). DDRAM address is set in the address
counter (AC) as a hexadecimal number. (refer to Figure 1)
MSB LSB
AC6 AC5 AC4 AC3 AC2 AC1 AC0
Figure 1. DDRAM Address
Display of 5-dot Font Width Character
5-dot 1-line Display
In case of 1-line display with 5-dot font, the address range of DDRAM is 00H-5FH (Refer to Figure 2).
COM1
COM8
COM1
COM8
COM1
COM8
1 2 3 4 5
00 01 02 03 04
SEG1
1 2 3 4 5
1 2 3 4 5
00 01 02 035F
20 21 22 23 24
. . . . 13 14 15 16 17
SEG120
S6A0078 S6A0078
20 21 22 23 24
0501 02 03 04
. . . . 14 15 16 17
(After Shift Left)
20 21 22 23 24
. . . . 13 14 15 16 17
12
(After Shift Right)
25 26 27 28 29
18 19 1A 1B 1C
SEG1
25 26 27 28 29
19 1A 1B 1C
18 1D
25 26 27 28 29
18 19 1A 1B
Figure 2. 1-line X 48ch. Display
Display Position
44 45 46 47 48
. . . . 2B 2C 2D 2E 2F
DDRAM Address
44 45 46 47 48
. . . . 2C 2D 2E 2F 30
44 45 46 47 48
. . . . 2A 2B 2C 2D 2E
COM9
COM16
SEG120
COM9
COM16
COM9
COM16
11
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
5-dot 2-line Display
In case of 2-line display with 5-dot font, the address range of DDRAM is 00H-2FH, 40H-6FH (refer to Figure 3).
Display Position
COM1
COM8
COM17
COM24
COM1
COM8
COM17
COM24
COM1
COM8
COM17
COM24
1 2 3 4 5
00 01 02 03 04
40 41 42 43 44
SEG1
1 2 3 4 5
41 42 43 44
1 2 3 4 5
00 01 02 032F
6F 40 41 42
20 21 22 23 24
. . . . 13 14 15 16 17
. . . . 53 54 55 56 57 58 59 5A 5B 5C . . . . 6B 6C 6D 6E 6F
SEG120
S6A0078 S6A0078
20 21 22 23 24
0501 02 03 04
. . . . 14 15 16 17
. . . . 54 55 56 57 58 59 5A 5B 5C . . . . 6C 6D 6E 6F
45 5D 40
(After Shift Left)
20 21 22 23 24
. . . . 13 14 15 16 17
. . . . 52 53 54 55 56 57 58 59 5A . . . . 6A 6B 6C 6D
43 5B 6E
12
(After Shift Right)
25 26 27 28 29
18 19 1A 1B 1C
SEG1
25 26 27 28 29
19 1A 1B 1C
18 1D
25 26 27 28 29
18 19 1A 1B
44 45 46 47 48
. . . . 2B 2C 2D 2E 2F
SEG120
DDRAM Address
44 45 46 47 48
. . . . 2C 2D 2E 2F 00
44 45 46 47 48
. . . . 2A 2B 2C 2D 2E
Figure 3. 2-line X 48ch. Display (5-dot Font Width)
COM9
COM16
COM25
COM32
COM9
COM16
COM25
COM32
COM9
COM16
COM25
COM32
12
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
5-dot 4-line Display
In case of 4-line display with 5-dot font, the address range of DDRAM is 00H-17H, 20H-37H, 40H-57H, 60H-77H
(refer to Figure 4).
Display Position
COM1
COM8
COM9
COM16
COM17
COM24
COM25
COM32
COM1
COM8
COM9
COM16
COM17
COM24
COM25
COM32
COM1
COM8
COM9
COM16
COM17
COM24
COM25
COM32
1 2 3 4 5
00 01 02 03 04
61 62 63 6460
SEG1
1 2 3 4 5
01 02 03 04
2421 22 23
4441 42 43
61 62 63 64
1 2 3 4 5
00 01 02 03
17
20 21 22 23
37
40 41 42 43
57
77
61 62 6360
20 21 22 23 24
. . . . 13 14 15 16 17
2420 21 22 23
. . . . 33 34 35 36 37
4440 41 42 43
. . . . 53 54 55 56
. . . . 74 75 76 7773
DDRAM Address
S6A0078
20 21 22 23 24
. . . . 14 15 16 17
05
. . . . 34 35 36 37
25
. . . . 54 55 56
45
. . . . 74 75 76 77
65
(After Shift Left)
20 21 22 23 24
. . . . 13 14 15 1612
. . . . 33 34 35 3632
. . . . 53 54 55 56
. . . . 74 75 7672 73
(After Shift Right)
52
57
SEG120
00
20
57
40
60
Figure 4. 4-line X 24ch. Display (5-dot Font Width)
13
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
Display of 6-dot Font Width Character
6-dot 1-line Display
In case of 1-line display with 6-dot font, the address range of DDRAM is 00H-5FH (refer to Figure 5).
Display Position
COM1
COM8
COM1
COM8
COM1
COM8
1 2 3 4 5
00 01 02 03 04
SEG1
1 2 3 4 5
1 2 3 4 5
00 01 02 035F
16 17 18 19 20
. . . . 0F 10 11 12 13
SEG120
S6A0078 S6A0078
16 17 18 19 20 21 22 23 24 25
0501 02 03 04
. . . . 10 11 12 13
(After Shift Left)
16 17 18 19 20 21 22 23 24 25
. . . . 0F 10 11 12 13
0E
(After Shift Right)
21 22 23 24 25
14 15 16 17 18
SEG1
15 16 17 18 . . . . 24 25 26 27 28
14 19
14 15 16 17 . . . . 22 23 24 25 26
Figure 5. 1-line X 40ch. Display
36 37 38 39 40
. . . . 23 24 25 26 27
DDRAM Address
36 37 38 39 40
36 37 38 39 40
COM9
COM16
SEG120
COM9
COM16
COM9
COM16
14
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
6-dot 2-line Display
In case of 2-line display with 6-dot font, the address range of DDRAM is 00H-2FH, 40H-6FH (refer to Figure 6).
Display Position
COM1
COM8
COM17
COM24
COM1
COM8
COM17
COM24
COM1
COM8
COM17
COM24
1 2 3 4 5
00 01 02 03 04
40 41 42 43 44
SEG1
1 2 3 4 5
41 42 43 44
1 2 3 4 5
00 01 02 032F
6F 40 41 42
16 17 18 19 20
. . . . 0F 10 11 12 13
. . . . 4F 50 51 52 53 54 55 56 57 58 . . . . 63 64 65 66 67
SEG120
S6A0078 S6A0078
16 17 18 19 20 21 22 23 24 25 36 37 38 39 40
0501 02 03 04
. . . .
. . . . 50 51 52 53 54 55 56 57 58 . . . . 64 65 66 67
45 59 68
. . . . 0F 10 11 12 13
. . . . 4E 4F 50 51 52 53 54 55 56 . . . . 62 63 64 65
43 57 66
10 11 12 13 14 15 16 17 18 19
(After Shift Left)
16 17 18 19 20 21 22 23 24 25 36 37 38 39 40
0E
(After Shift Right)
21 22 23 24 25
14 15 16 17 18
SEG1
14 15 16 17 . . . . 22 23 24 25 26
. . . . 23 24 25 26 27
DDRAM Address
. . . . 24 25 26 27 28
36 37 38 39 40
SEG120
Figure 6. 2-line X 40ch. Display (6-dot Font width)
COM9
COM16
COM25
COM32
COM9
COM16
COM25
COM32
COM9
COM16
COM25
COM32
15
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
6-dot 4-line Display
In case of 4-line display with 6-dot font, the address range of DDARM is 00H-17H, 20H-37H, 40H-57H, 60H-77H
(refer to Figure 7).
Display Position
COM1
COM8
COM9
COM16
COM17
COM24
COM25
COM32
COM1
COM8
COM9
COM16
COM17
COM24
COM25
COM32
COM1
COM8
COM9
COM16
COM17
COM24
COM25
COM32
1 2 3 4 5
00 01 02 03 04
61 62 63 6460
SEG1
1 2 3 4 5
01 02 03 04
2421 22 23
4441 42 43
61 62 63 64
1 2 3 4 5
00 01 02 03
17
20 21 22 23
37
40 41 42 43
57
77
61 62 6360
16 17 18 19 20
. . . . 0F 10 11 12 13
2420 21 22 23
. . . . 2F 30 31 32 33
4440 41 42 43
. . . . 4F 50 51 52
. . . . 70 71 72 736F
DDRAM Address
S6A0078
16 17 18 19 20
. . . . 10 11 12 13
05
. . . . 30 31 32 33
25
. . . . 50 51 52
45
. . . . 70 71 72 73
65
(After Shift Left)
16 17 18 19 20
. . . . 0F 10 11 120E
. . . . 2F 30 31 322E
. . . . 4F 50 51 52
. . . . 70 71 726E 6F
(After Shift Right)
4E
53
SEG120
14
34
53
54
74
16
Figure 7. 4-line X 20ch. Display (6-dot Font Width)
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
TIMING GENERATION CIRCUIT
Timing generation circuit generates clock signals for the internal operations.
ADDRESS COUNTER (AC)
Address Counter (AC) stores DDRAM/CGRAM/SEGRAM address, transferred from IR. After writing into (reading
from) DDRAM/CGRAM/SEGRAM, AC is automatically increased (decreased) by 1. When RS = "Low" and R/W =
"High", AC can be read through DB0-DB6
CURSOR/BLINK CONTROL CIRCUIT
It controls cursor/blink ON/OFF and black/white inversion at cursor position.
LCD DRIVER CIRCUIT
LCD Driver circuit has 34 common and 120 segment signals for LCD driving. Data from
SEGRAM/CGRAM/CGROM is transferred to 120-bit segment latch serially, and then it is stored to 120-bit shift
latch. When each common is selected by 34-bit common register, segment data also output through segment
driver from 100-bit segment latch. In case of 1-line display mode, COM0-COM17 have 1/17 duty, and in 2-line or
4-line mode, COM0-COM33 have 1/33 duty ratio.
17
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
CGROM (CHARACTER GENERATOR ROM)
CGROM has 5 × 8-dot 240 character pattern
CGRAM (CHARACTER GENERATOR RAM)
CGRAM has up to 5 × 8-dot 8 characters. By writing font data to CGRAM, user defined character can be used
(refer to Table 4).
5x8 Dot Character Pattern
Table 4. Relationship between Character Code (DDRAM) and Character Pattern (CGRAM)
Character Code (DDRAM data) CGRAM Address CGRAM Data
D7 D6 D5 D4 D3 D2 D1 D0 A5 A4 A3 A2 A1 A0 P7 P6 P5 P4 P3 P2 P1 P0
0 0 x0 0 0 0 0 0 0 0 0 0
0 0
0 0
.
.
.
.
.
.
.
0 0 0 x0 1 1 1 1 1 1 0 0 0
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1
0
1 1
0 0
1
0
1 1
1 1
1 1 1
.
.
0 0
0 0
1
0
1 1
0 0
1
0
1 1
1 1
1 1 1
B1 B0 x 0 0
1
.
.
.
.
.
0
B1 B0 x
1
.
.
.
.
.
0
1 1 10
1
0 0 0
1
0 0 0
1
1 1 1 1
1
0 0 0
1
0 0 0
1
0 0 0
0
0 0 0 0
.
.
01 10 0
1
0 0 0
1
0 0 0
1
1 1 1 1
1
0 0 0
1
0 0 0
1
0 0 0
0
0 0 0 0
Pattern
Number
Pattern 1
1
1
1
1
1
.
.
Pattern 8
1
1
1
1
1
18
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
6 x 8 Dots Character Pattern
Character Code (DDRAM data) CGRAM Address CGRAM Data
D7 D6 D5 D4 D3 D2 D1 D0 A5 A4 A3 A2 A1 A0 P7 P6 P5 P4 P3 P2 P1 P0
0 0 x0 0 0 0 0 0 0 0 0 0
0 0
0 0
.
.
.
.
.
.
.
0 0 0 x0 1 1 1 1 1 1 0 0 0
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1
0
1 1
0 0
1
0
1 1
1 1
1 1 1
.
.
0 0
0 0
1
0
1 1
0 0
1
0
1 1
1 1
1 1 1
B1 B0 0 0 0
1
0
B1 B0 0
1
0
0
0
.
0
.
.
0
.
0
.
0
0
0
0
.
0
.
.
0
.
0
.
0
0
1 1 10
1
0 0 0
1
0 0 0
1
1 1 1 1
1
0 0 0
1
0 0 0
1
0 0 0
0
0 0 0 0
.
.
01 10 0
1
0 0 0
1
0 0 0
1
1 1 1 1
1
0 0 0
1
0 0 0
1
0 0 0
0
0 0 0 0
Pattern
Number
Pattern 1
1
1
1
1
1
.
.
Pattern 8
1
1
1
1
1
1. When BE (Blink Enable bit) = "High", blink is controlled by B1 and B0 bit.
In case of 5-dot font width, when B1 = "1", enabled dots of P0-P4 will blink, and when B1 = "0" and B0 = "1",
enabled dots in P4 will blink, when B1 = "0" and B0 = "0", blink will not happen.
In case of 6-dot font width, when B1 = "1", enabled dots of P0-P5 will blink, and when B1 = "0" and B0 = "1",
enabled dots of P5 will blink, when B1 = "0" and B0 = "0", blink will not happen.
2. "X": Don't care
19
S6A0078 120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD
SEGRAM (SEGMENT ICON RAM)
SEGRAM has segment control data and segment pattern data. During 1-line display mode, COM0 (COM17)
makes the data of SEGRAM enable to display icons. When used in 2/4-line display mode COM0 (COM33) does
that. Its higher 2-bits are blinking control data, and lower 6-bits are pattern data (refer to Table 5 and Figure 7).
Table 5. Relationship Between SEGRAM Address and Display Pattern
SEGRAM Address
5-dot Font Width 6-dot Font Width
A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 B1 B0 X S1 S2 S3 S4 S5 B1 B0 S1 S2 S3 S4 S5 S6
0 0 0 1 B1 B0 X S6 S7 S8 S9 S10 B1 B0 S7 S8 S9 S10 S11 S12
0 0 1 0 B1 B0 X S11 S12 S13 S14 S15 B1 B0 S13 S14 S15 S16 S17 S18
0 0 1 1 B1 B0 X S16 S17 S18 S19 S20 B1 B0 S19 S20 S21 S22 S23 S24
0 1 0 0 B1 B0 X S21 S22 S23 S24 S25 B1 B0 S25 S26 S27 S28 S29 S30
0 1 0 1 B1 B0 X S26 S27 S28 S29 S30 B1 B0 S31 S32 S33 S34 S35 S36
0 1 1 0 B1 B0 X S31 S32 S33 S34 S35 B1 B0 S37 S38 S39 S40 S41 S42
0 1 1 1 B1 B0 X S36 S37 S38 S39 S40 B1 B0 S43 S44 S45 S46 S47 S48
1 0 0 0 B1 B0 X S41 S42 S43 S44 S45 B1 B0 S49 S50 S51 S52 S53 S54
1 0 0 1 B1 B0 X S46 S47 S48 S49 S50 B1 B0 S55 S56 S57 S58 S59 S60
1 0 1 0 B1 B0 X S51 S52 S53 S54 S55 B1 B0 S61 S62 S63 S64 S65 S66
1 0 1 1 B1 B0 X S56 S57 S58 S59 S60 B1 B0 S67 S68 S69 S70 S71 S72
1 1 0 0 B1 B0 X S61 S62 S63 S64 S65 B1 B0 S73 S74 S75 S76 S77 S78
1 1 0 1 B1 B0 X S66 S67 S68 S69 S70 B1 B0 S79 S80 S81 S82 S83 S84
1 1 1 0 B1 B0 X S71 S72 S73 S74 S75 B1 B0 S85 S86 S87 S88 S89 S90
1 1 1 1 B1 B0 X S76 S77 S78 S79 S80 B1 B0 S91 S92 S93 S94 S95 S96
SEGRAM Data Display Pattern
• B1, B0: Blinking control bit
Control Bit Blinking Port
BE B1 B0 5-dot font width 6-dot font width
0 X X No blink No blink
1 0 0 No blink No blink
1 0 1 D4 D5
1 1 X D4 - D0 D5 - D0
• S1-S80: Icon pattern ON / OFF in 5-dot font width
S1-S96: Icon pattern ON / OFF in 6-dot font width
• "X": Don't care
20
120 SEG / 34 COM DRIVER & CONTROLLER FOR DOT MATRIX LCD S6A0078
SEG120
SEG91
SEG92
SEG93
SEG94
SEG95
SEG111
SEG112
SEG113
SEG114
SEG116
SEG117
SEG118
SEG119
SEG96
SEG115
SEG120
SEG109
SEG110
5-Dot Font Width (FW = 0)
S1 S2 S3 S4 S5
SEG1
SEG2
SEG3
SEG4
SEG5
6-Dot Font Width (FW = 1)
S1 S2 S3 S4 S5
S6
S76 S77 S78 S79 S80 S111S112S113S114S115 S116S117S118S119S120
. . .. . .
SEG76
SEG77
SEG78
SEG79
SEG80
S91 S92 S93 S94 S95 S109S110 S113 S116 S117 S118 S119
S96
SEG111
SEG112
SEG113
S111S112 S114
SEG114
SEG115
S115
SEG116
SEG117
SEG118
SEG119
S120
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
. . .. . .
Figure 7. Relationship between SEGRAM and Segment Display
21
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