Pad No.

X

Y

Pad No.

X

Y

Pad No.

X

Y

13

-1672.500

162.100

52

857.450

-1770.250

91

1235.500

1880.000

14

-1672.500

40.300

53

971.050

-1770.250

92

1140.500

1880.000

15

-1672.500

-79.700

54

1084.650

-1770.250

93

1045.500

1880.000

16

-1672.500 -201.500

55

1206.800

-1848.100

94

950.500

1880.000

17

-1672.500 -321.500

56

1330.200

-1880.000

95

855.500

1880.000

18

-1672.500 -416.500

57

1427.200

-1880.000

96

760.500

1880.000

19

-1672.500 -511.500

58

1672.500

-1880.000

97

665.500

1880.000

20

-1672.500 -606.500

59

1672.500

-1643.600

98

570.500

1880.000

21

-1672.500 -701.500

60

1672.500

-1548.600

99

475.500

1880.000

22

-1672.500 -796.500

61

1672.500

-1453.600

100

380.500

1880.000

23

-1672.500 -891.500

62

1672.500

-1358.600

101

285.500

1880.000

24

-1672.500 -986.500

63

1672.500

-1263.600

102

190.500

1880.000

25

-1672.500 -1081.500

64

1672.500

-1168.600

103

95.500

1880.000

26

-1672.500 -1176.500

65

1672.500

-1073.600

104

0.500

1880.000

27

-1672.500 -1271.500

66

1672.500

-978.600

105

-94.500

1880.000

28

-1672.500 -1366.500

67

1672.500

-883.600

106

-189.500

1880.000

29

-1672.500 -1461.500

68

1672.500

-788.600

107

-284.500

1880.000

30

-1672.500 -1556.500

69

1672.500

-693.600

108

-379.500

1880.000

31

-1672.500 -1651.500

70

1672.500

-598.600

109

-474.500

1880.000

32

-1208.550 -1880.000

71

1672.500

-503.600

110

-569.500

1880.000

33

-1113.550 -1880.000

72

1672.500

-408.600

111

-664.500

1880.000

34

-1018.550 -1880.000

73

1672.500

-295.600

112

-759.500

1880.000

35

-895.500 -1784.900

74

1672.500

-182.600

113

-854.500

1880.000

36

-789.900 -1784.900

75

1672.500

-69.600

114

-949.500

1880.000

37

-694.900 -1784.900

76

1672.500

43.400

115

-1044.500 1880.000

38

-589.300 -1784.900

77

1672.500

156.400

116

-1139.500 1880.000

39

-494.300 -1784.900

78

1672.500

269.400

117

-1234.500 1880.000

Pad Description

Pad No.

Pad Name

I/O

Description

1~17

71~117

SEG47~SEG63

SEG0~SEG46

O

LCD segment outputs

18~33

55~70

COM31~COM16

COM0~COM15

O

LCD common outputs, under 80

´16 command mode, COM16~COM31 will be

shared with SEG64~SEG79. COM31/SEG64, COM30/SEG65,

COM29/SEG66....., COM18/SEG77, COM17/SEG78, COM16/SEG79

34

CS

I

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-

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.

35

RD

I

READ clock input with pull-high resistor. Data in the RAM of the HT1650 are

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.

36

WR

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.

37~40

DB0~DB3

I/O

Parallel data input/output with pull-high resistor

41

VSS

¾ Negative power supply for logic circuit, ground

42

43

OSCI

OSCO

I

O

The OSCI and OSCO pads are connected to a 32.768kHz crystal in order to

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.

44

VDD

¾ Positive power supply for logic circuit

45

VLCD

I

Power supply for LCD driver circuit

HT1650

Rev. 1.80

4

November 9, 2010

PATENTED