HT1650 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT1650' PDF : 18 Pages View PDF
PATENTED
HT1650
Pad No.
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
X
Y
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1672.500
-1208.550
-1113.550
-1018.550
-895.500
-789.900
-694.900
-589.300
-494.300
162.100
40.300
-79.700
-201.500
-321.500
-416.500
-511.500
-606.500
-701.500
-796.500
-891.500
-986.500
-1081.500
-1176.500
-1271.500
-1366.500
-1461.500
-1556.500
-1651.500
-1880.000
-1880.000
-1880.000
-1784.900
-1784.900
-1784.900
-1784.900
-1784.900
Pad No.
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
X
857.450
971.050
1084.650
1206.800
1330.200
1427.200
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
1672.500
Y
-1770.250
-1770.250
-1770.250
-1848.100
-1880.000
-1880.000
-1880.000
-1643.600
-1548.600
-1453.600
-1358.600
-1263.600
-1168.600
-1073.600
-978.600
-883.600
-788.600
-693.600
-598.600
-503.600
-408.600
-295.600
-182.600
-69.600
43.400
156.400
269.400
Pad No.
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
X
1235.500
1140.500
1045.500
950.500
855.500
760.500
665.500
570.500
475.500
380.500
285.500
190.500
95.500
0.500
-94.500
-189.500
-284.500
-379.500
-474.500
-569.500
-664.500
-759.500
-854.500
-949.500
-1044.500
-1139.500
-1234.500
Y
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
1880.000
Pad Description
Pad No.
Pad Name
1~17
SEG47~SEG63
71~117 SEG0~SEG46
18~33
55~70
COM31~COM16
COM0~COM15
34
CS
35
RD
36
37~40
41
WR
DB0~DB3
VSS
42
OSCI
43
OSCO
44
VDD
45
VLCD
I/O
Description
O LCD segment outputs
LCD common outputs, under 80´16 command mode, COM16~COM31 will be
O shared with SEG64~SEG79. COM31/SEG64, COM30/SEG65,
COM29/SEG66....., COM18/SEG77, COM17/SEG78, COM16/SEG79
Chip selection input with pull-high resistor. When the CS is logic high, the data
and command read from or write to the HT1650 are disabled. The serial inter-
I face circuit is also reset. But if the CS is at a logic low level and is input to the
CS pad, the data and command transmission between the host controller and
the HT1650 are all enabled.
READ clock input with pull-high resistor. Data in the RAM of the HT1650 are
I
clocked out on the falling edge of the RD signal. The clocked out data will ap-
pear on the data line. The host controller can use the next rising edge to latch
the clocked out data.
I
WRITE clock input with pull-high resistor. Data on the DATA line are latched
into the HT1650 on the rising edge of the WR signal.
I/O Parallel data input/output with pull-high resistor
¾ Negative power supply for logic circuit, ground
The OSCI and OSCO pads are connected to a 32.768kHz crystal in order to
I
O
generate a system clock. If the system clock comes from an external clock
source, the external clock source should be connected to the OSCI pad. But if
an on-chip RC oscillator is selected, the OSCI and OSCO pads can be left
open.
¾ Positive power supply for logic circuit
I Power supply for LCD driver circuit
Rev. 1.80
4
November 9, 2010
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