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PDF HCD66774 Data sheet ( Hoja de datos )
| Número de pieza | HCD66774 | |
| Descripción | 240-Channel Gate Driver | |
| Fabricantes | Hitachi | |
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HD66774
Rev. 1.0 July 2002
HD66774
240-Channel Gate Driver for Color-TFT Liquid Crystal
Displays
mRev.1.0
oJuly 2002
.cDescription
UHD66774 is a gate-driver IC for systems with color-TFT-liquid-crystal dot-matrix graphic displays.
t4It incorporates a circuit for driving 240 channels of TFT gate-line driving and all the power-supply
circuits that are required for liquid crystal displays, and realizes the liquid crystal display by adding
only an external capacitor.
eeWhen used with the HD66770 396-channel source driver with on-chip RAM, and used with the
HD66772 528-channel source driver with on-chip RAM, this LSI is suitable for color TFT displays
hof cellular phones having 132-by-176 and 176-by-240 dots, respectively.
SFeatures
ta• TFT gate-line driving circuits
a 240 outputs
.D• Gate-line scanning
Centering-screen function (vertically separated, comb type)
w• Internal power-supply circuit
Step-up circuit: five to nine times, positive-polarity inversion
w Structure of TFT-display retention capacitor: Cst or Cadd
w• Alternating functions for TFT-display counter-electrode power supply
N-line alternating drive of Vcom (Vgoff is also available for N-line alternating drive for
Cadd)
Adjustment of Vcom (Vgoff) amplitude: internal 22-level digital potentiometer
• Output power-supply voltage
For the source driver: DDVDH - GND = 4.5 to 5.5 V (power supply for HD66770/772
liquid crystal output circuits), VDH - GND = 3.0 to DDVDH-0.5V (reference power supply
for HD66770/772 grayscale voltages)
1
1 page  
HD66774
Rev. 1.0 July 2002
Table 1 Pin Functions (cont)
Signal Name
VREG1OUT
Quantity*
1
VREG1
1
VREG2OUT
1
VREG2
1
C11+, C11- to 10
C23+, C23-
C31+, C31-
2
C41+, C41-
2
Vcom1
Vcom2
Vcom3
3
Input/
Output
Output
Input
Output
Input
-
-
-
Output
Connected to
Capacitor for
stabilization
and VREG1 or
open
VREG1OUT
or power
supply
Capacitor for
stabilization
and VREG2 or
open
VREG2OUT
or power
supply
Step-up
capacitor
Step-up
capacitor
Step-up
capacitor
TFT-display
common
electrode
Function
This pin generates and outputs a reference
voltage for VREG1 between DDVDH and GND
from the reference voltage between Vci and
GND that is internally generated. The
amplification can be set in an internal register.
Connect this pin to VREG1 and a capacitor for
stabilization. When this pin is not used, leave it
open.
A reference voltage for generating Vcom.
Connect VREG1OUT. When VREG1OUT is
not used, connect an external power supply
lower than DDVDH.
This pin generates and outputs a reference
voltage for VREG2 between GND and VGL
from the reference voltage between Vci and
GND that is internally generated. The
amplification can be set in an internal register.
Connect this pin to VREG2 and a capacitor for
stabilization. When this pin is not used, leave it
open.
A reference voltage for generating Vgoff.
Connect VREG2OUT. When VREG2OUT is
not used, connect an external power supply
lower than VGL.
Connect the step-up capacitor according to the
step-up factor. When the internal step-up
circuit is not used, leave this pin open.
Connect a step-up capacitor for generating the
VGL level from the VGH and GND levels.
When the internal step-up circuit is not used,
leave these pins open.
Connect a step-up capacitor for generating the
–Vci4 level from the Vci4 and GND levels.
When the internal step-up circuit is not used,
leave these pins open.
A power supply for the TFT-display common
electrode. When the reversing Vcom
alternation is not driven, the amplitude between
VcomH and VcomL is output. The alternating
cycle can be set by the M pin. Connect this pin
to the TFT-display common electrode.
5
5 Page 
HD66774
Rev. 1.0 July 2002
No. Pin Name
1 DUMMY1
2 Vcom1
3 Vcom1
4 DUMMY5
5 Vcom2
6 Vcom2
7 C31-
8 C31+
9 C21-
10 C21+
11 C22-
12 C22+
13 C23-
14 C23+
15 C41-
16 C41+
17 C11-
18 C11+
19 C12-
20 C12+
21 VGL
22 VGL
23 VLOUT3
24 Vci3
25 VGH
26 VGH
27 VLout2
28 VCL
29 VCL
30 VLout4
31 Vci1
32 Vciout
33 iDUMMY1
34 iDUMMY2
35 iDUMMY3
36 iDUMMY4
37 iDUMMY5
38 iDUMMY6
39 iDUMMY7
40 iDUMMY8
41 iDUMMY9
42 iDUMMY10
43 iDUMMY11
44 iDUMMY12
45 iDUMMY13
46 iDUMMY14
47 iDUMMY15
48 iDUMMY16
49 VDH
50 Vci2
51 DDVDH
52 DDVDH
53 VLOUT1
54 Vgoff
55 VgoffOUT
56 VgoffH
57 VgoffL
58 TESTA3
59 VREG2
60 VREG2OUT
X (um)
-6870
-6680
-6580
-6480
-6380
-6280
-6180
-6080
-5980
-5880
-5780
-5680
-5580
-5480
-5380
-5280
-5180
-5080
-4980
-4880
-4780
-4680
-4580
-4480
-4380
-4280
-4180
-4080
-3980
-3880
-3780
-3680
-3520
-3460
-3400
-3340
-3280
-3220
-3160
-3100
-3040
-2980
-2920
-2860
-2800
-2740
-2680
-2620
-2460
-2360
-2260
-2160
-2060
-1960
-1860
-1760
-1660
-1560
-1460
-1360
Y (um) No. Pin Name
-1470 61
VcomL
-1437 62
TESTA4
-1437 63
VcomH
-1437 64
TESTA1
-1437 65
VcomR
-1437 66 VREG1OUT
-1437 67
VREG1
-1437 68
REGN
-1437 69
REGP
-1437 70
TESTA2
-1437 71
VTEST
-1437 72
Vcc1
-1437 73
Vcc1
-1437 74
Gnd
-1437 75
Gnd
-1437 76
Vcc2
-1437 77
Vcc2
-1437 78
Vci4
-1437 79
Vci
-1437 80
Vci
-1437 81 iDUMMY17
-1437 82 iDUMMY18
-1437 83 iDUMMY19
-1437 84 iDUMMY20
-1437 85 iDUMMY21
-1437 86 iDUMMY22
-1437 87 iDUMMY23
-1437 88 iDUMMY24
-1437 89 iDUMMY25
-1437 90 iDUMMY26
-1437 91 iDUMMY27
-1437 92 iDUMMY28
-1460 93 iDUMMY29
-1460 94 iDUMMY30
-1460 95 iDUMMY31
-1460 96 iDUMMY32
-1460 97 iDUMMY33
-1460 98 iDUMMY34
-1460 99 iDUMMY35
-1460 100 iDUMMY36
-1460 101 iDUMMY37
-1460 102 iDUMMY38
-1460 103 iDUMMY39
-1460 104 iDUMMY40
-1460 105 iDUMMY41
-1460 106 iDUMMY42
-1460 107 iDUMMY43
-1460 108 iDUMMY44
-1437 109 iDUMMY45
-1437 110 iDUMMY46
-1437 111 iDUMMY47
-1437 112 iDUMMY48
-1437 113 iDUMMY49
-1437 114 iDUMMY50
-1437 115 iDUMMY51
-1437 116 iDUMMY52
-1437 117 iDUMMY53
-1437 118 iDUMMY54
-1437 119 iDUMMY55
-1437 120
DCCLK
X (um)
-1260
-1160
-1060
-960
-860
-760
-660
-560
-460
-360
-260
-160
-60
40
140
240
340
440
540
640
740
800
860
920
980
1040
1100
1160
1220
1280
1340
1400
1460
1520
1580
1640
1700
1760
1820
1880
1940
2000
2060
2120
2180
2240
2300
2360
2420
2480
2540
2600
2660
2720
2780
2840
2900
2960
3020
3180
Y (um)
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1437
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
No.
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
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
Pin Name
GCL
GCS*
GDA
EQ
M
FLM
CL1
DISPTMG
RESET*
VccDMY
SCM1
SCM2
GndDMY
DCTEST
PONTEST
OPOFF
Vcom3
Vcom3
GTEST2
G2
G4
G6
G8
G10
G12
G14
G16
G18
G20
G22
G24
G26
G28
G30
G32
G34
G36
G38
G40
G42
G44
G46
G48
G50
G52
G54
G56
DUMMY2
G58
G60
G62
G64
G66
G68
G70
G72
G74
G76
G78
G80
X (um)
3280
3380
3480
3580
3680
3780
3880
3980
4080
4180
4280
4380
4480
4580
4680
4780
4880
4980
5075
5135
5195
5255
5315
5375
5435
5495
5555
5615
5675
5735
5795
5855
5915
5975
6035
6095
6155
6215
6275
6335
6395
6455
6515
6575
6635
6695
6755
6870
6860
6860
6860
6860
6860
6860
6860
6860
6860
6860
6860
6860
Y (um)
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1437
-1437
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1460
-1470
-1280
-1220
-1160
-1100
-1040
-980
-920
-860
-800
-740
-680
-620
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HCD66774.PDF ] | |
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