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PDF HT1647 Data sheet ( Hoja de datos )
| Número de pieza | HT1647 | |
| Descripción | 4-Level Gray Scale 64x16 LCD Controller for I/O C | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HT1647 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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HT1647
4-Level Gray Scale 64´16 LCD Controller for I/O mC
Features
· Operating voltage: 2.7V~5.2V
· Built-in 32kHz RC oscillator
· External 32.768kHz crystal oscillator or
32kHz frequency source input
· Standby current < 1mA at 3V, < 2mA at 5V
· Internal resistor type: 1/5 bias or 1/4
bias, 1/16 duty
· Two selectable LCD frame frequencies:
89Hz or 170Hz
· Max. 64´16 patterns, 64 segments and 16
commons
· Built-in bit-map display RAM: 2048 bits
(=64´16´2 bits)
· Built-in internal resistor type bias generator
· Six-wire interface (four data wires)
· Eight kinds of time base/WDT selection
· Time base or WDT overflow output
· R/W address auto increment
Applications
· Toys
· Games
· Personal digital assistant
General Description
HT1647 is a peripheral device specially de-
signed for I/O type mC used to expand the dis-
play capability. The max. display segment of
the device are 1024 patterns (64 segments and
16 commons). It also supports four data bits in-
terface, buzzer sound, Watchdog Timer or time
base timer functions. The HT1647 is a memory
mapping and multi-function LCD controller.
Since the HT1647 can control ECB-type (Elec-
trically Controlled Birefringence) LCDs in ad-
dition to current TN-type (Twisted Nematic) or
STN-type (Super Twisted Nematic) LCDs, it
can support 4-color display as well as 4-level
· Built-in buzzer driver (2kHz/4kHz)
· Power down command reduces power
consumption
· Software configuration feature
· Data mode and Command mode
instructions
· Three data accessing modes
· Provides VLCD pin to adjust LCD operating
voltage
· Provides three kinds of bias current
programming
· Control of TN-type, STN-type LCDs and
ECB-type LCDs
· Four-level gray scale output for TN-type,
STN-type LCDs panel
· Four-color output for ECB-type LCDs panel
· Available in 100-pin QFP and in chip form
· Cellular phone
· Global positioning system
· Consumer electronics
gray scale display. It displays 4-level gray scale
output when HT1647 drives TN-type,
STN-type LCDs. It displays four color output
when HT1647 drives ECB-type. HT1647 uses
PWM (Pulse Width Modulation) technique. The
software configuration feature of the HT1647
make it suitable for multiple LCD applications
including LCD modules and display subsys-
tems. Only six lines (CS, WR, DB0~DB3) are
required for the interface between the host con-
troller and the HT1647. The HT164X series
have many kinds of products that match vari-
ous applications.
1 April 21, 2000
1 page  
HT1647
Pad Coordinates
Unit: mm
Pad No.
X
Y
1 -1774.50 1708.30
2 -1779.30 1409.80
3 -1779.30 1281.80
4 -1779.30 1150.00
5 -1779.30 1022.00
6 -1779.30 890.20
7 -1779.30 762.20
8 -1779.30 630.40
9 -1779.30 502.40
10 -1779.30 370.60
11 -1779.30 242.60
12 -1779.30 110.80
13 -1779.30 -17.20
14 -1779.30 -149.00
15 -1779.30 -277.00
16 -1779.30 -408.80
17 -1779.30 -536.80
18 -1779.30 -668.60
19 -1779.30 -796.60
20 -1779.30 -928.80
21 -1779.30 -1056.80
22 -1779.30 -1189.00
23 -1690.00 -1375.40
24 -1690.00 -1515.40
25 -1690.00 -1651.00
26 -1430.20 -1599.90
27 -1294.80 -1599.90
28 -1149.50 -1599.90
29 -1013.90 -1599.90
30 -872.80 -1600.00
31 -738.30 -1600.00
32 -600.10 -1600.00
33 -465.60 -1600.00
Pad No.
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
60
61
62
63
64
65
66
X
-331.40
-194.50
-48.00
87.40
235.20
383.40
530.40
678.60
875.00
1003.00
1134.80
1262.80
1394.60
1522.60
1654.40
1782.40
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
1775.70
Y
-1600.00
-1558.30
-1600.00
-1600.00
-1600.00
-1600.00
-1600.00
-1600.00
-1712.30
-1712.30
-1712.30
-1712.30
-1712.30
-1712.30
-1712.30
-1712.30
-1411.10
-1283.10
-1151.30
-1023.30
-891.50
-763.50
-631.70
-503.70
-371.90
-243.90
-112.10
15.90
147.70
275.70
407.50
535.50
667.30
Pad No.
X
67 1775.70
68 1775.70
69 1775.70
70 1775.70
71 1775.70
72 1775.70
73 1775.70
74 1775.70
75 1471.10
76 1343.10
77 1211.30
78 1083.30
79 951.50
80 823.50
81 691.70
82 563.70
83 431.90
84 303.90
85 172.10
86 44.10
87 -87.70
88 -215.70
89 -347.50
90 -475.50
91 -607.30
92 -735.30
93 -867.10
94 -995.10
95 -1126.90
96 -1254.90
97 -1386.70
98 -1514.70
99 -1646.50
Y
795.30
927.10
1055.10
1186.90
1314.90
1446.70
1574.70
1706.50
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
1708.30
5 April 21, 2000
5 Page 
HT1647
Name
FRAME 170Hz
FRAME 89Hz
Command Code
X100-0001-1000-XXXX
X100-0001-1101-XXXX
Function
Select 170Hz frame frequency and active segment
signal width can be divided into 13 sections
Select 89Hz frame frequency and active segment sig-
nal width can be divided into 24 sections
Frame frequency selection command code
factory gray scale in every level. HT1647 provides
5-bit PWM data to control the length of the sec-
tion. In other words, a max. 24 gray scales are gen-
erated by 5-bit binary PWM data. At FRAME
89Hz mode, the HT1647 only provides a max. of
24 adjustable gray scales although 32 is the ex-
pressed max. value by 5 bits binary code. When 5
bits binary code value is more than 23, the PWM
control circuit uniformly regards 23. To increase
PWM data indicates to increase the length of the
active segment signal. The varied length of the ac-
tive segment signal displays varied gray scale in
TN-type, STN-type LCDs (refer to table 1). Simi-
larly, it displays varied color in ECB-type LCDs.
The color display is derived from ECB-type LCD
specification. At FRAME 170Hz mode, the
HT1647 only provides a max. of 13 adjustable
gray scales although 32 is the expressed max.
value by 5 bits binary code. When the 5 bits bi-
nary code value is more than 12, the PWM con-
trol circuit uniformly regards 12. The user must
appoint four kinds of PWM data to four kinds of
different gray scale level by commanding PWM
data (refer to table 2).
Name
Command Code
Function
GRS LEVEL 1 X100-001 B4-B3 B2 B1 B0-XXXX Set PWM data in gray scale level 1
GRS LEVEL 2 X100-010 B4-B3 B2 B1 B0-XXXX Set PWM data in gray scale level 2
GRS LEVEL 3 X100-011 B4-B3 B2 B1 B0-XXXX Set PWM data in gray scale level 3
GRS LEVEL 4 X100-100 B4-B3 B2 B1 B0-XXXX Set PWM data in gray scale level 4
Four kinds of gray scale level command code
11 April 21, 2000
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet HT1647.PDF ] | |
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