HOLTEK HT1626 User Manual

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Features

Operating voltage: 2.7V~5.2V

·

Built-in RC oscillator

·

External 32.768kHz crystal or 32kHz

·

frequency source input
1/5 bias, 1/16 duty, frame frequency is 64Hz

·

Max. 48´16 patterns,16 commons,48 segments

·

Built-in internal resistor type bias generator

·

3-wire serial interface

·

8 kinds of time base/WDT selection

·

Time base or WDT overflow output

·

Built-in LCD display RAM

·

General Description

HT1626 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 768 patterns (48´16). It also sup
ports serial interface, buzzer sound, Watchdog
Timer or time base timer functions. The
HT1626 is a memory mapping and
multi-function LCD controller. The software

HT1626

RAM Mapping 48´16 LCD Controller for I/O mC

R/W address auto increment

·

Two selection buzzer frequencies

·

(2kHz/4kHz)
Power down command reduces power

·

consumption
Software configuration feature

·

Data mode and Command mode instructions

·

Three data accessing modes

·

VLCD pin to adjust LCD operating voltage

·

Cascade application

·

configuration feature of the HT1626 make it

­suitable for multiple LCD applications includ

­ing LCD modules and display subsystems. Only
three lines are required for the interface be

­tween the host controller and the HT1626. The
HT162X series have many kinds of products
that match various applications.

-

-

Selection Table

HT162X HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270

COM 448 8 88

SEG 32 32 32 32 48 64

Built-in Osc.

Crystal Osc.

ÖÖ Ö ÖÖÖ Ö

ÖÖ ÖÖÖ Ö

1 April 21, 2000

16

48

16 16

64 64

Block Diagram

HT1626

Pin Assignment

OSCO

OSCI

DATA

VDD

WR

DATA

NC
NC

VSS

OSCI

OSCO

VDD

VLCD

IR Q

BZ
BZ

T1
T2
T3

T4
COM 0
COM 1
COM 2
COM 3
COM 4

NC

COM 5
COM 6
COM 7
COM 8
COM 9

COM 10
COM 11
COM 12

CS

RD

WR

C ontrol

and
Tim ing
Circuit

VSS

BZ

BZ

Tone Frequency

G enerator

SEG 42

SEG 47

RD

CS

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 4445 46 4748 49 50

COM 13

COM 14

COM 15

SEG 43

SEG 46

SEG 45

SEG 44

SEG 2

SEG 0

SEG 1

SEG 3

SEG 4

W atchdog Tim er

Tim e Base G enerator

SEG 41

SEG 40

SEG 39

SEG 38

H T1626
100 Q FP

SEG 6

SEG 5

SEG 7

SEG 8

D ispla y R A M

LCD Driver/
Bias Circuit

and

SEG 37

SEG 36

SEG 35

SEG 10

SEG 11

SEG 9

COM 0

COM 15

SEG 0

SEG 47

VLCD

IR Q

SEG 34

SEG 33

SEG 32

SEG 31

SEG 30

81828384858687888990919293949596979899100

SEG29

80

SEG28

79

SEG27

78

SEG26

77

SEG25

76

SEG24

75

NC

74
73

NC

72

NC

71

NC

70

NC

69

NC

68

NC

67

NC
NC

66
65

NC

64

NC

63

NC

62

NC

61

NC

60

NC

59

NC

58

NC

57

SEG23

56

SEG22

55

SEG21

54

SEG20

53

SEG19

52

SEG18

51

SEG17

SEG 12

SEG 13

SEG 14

SEG 15

SEG 16

2 April 21, 2000

Pad Assignment

HT1626

SEG 25

SEG 24

SEG 26

SEG 27

SEG 28

SEG 29

SEG 30

SEG 31

SEG 32

SEG 33

SEG 34

SEG 35

SEG 36

SEG 37

SEG 38

SEG 39

SEG 40

SEG 41

SEG 42

SEG 43

SEG 44

SEG 45

SEG 46

WR

RD

SEG 47

CS

DATA

VSS

OSCI

OSCO

VDD

VLCD

IR Q

BZ

BZ

T1

T2
T3

T4

COM 0

COM 1
COM 2

COM 3
COM 4

1

6

10

11

12

13

14

15

16

17

COM 5

18

COM 6

19

COM 7

20

COM 8

21

COM 9

80

22

COM 10

23

COM 11

79

24

COM 12

78

25

COM 13

77

26

COM 14

27

COM 15

76

28

SEG 0

75

74

29

SEG 1

30

SEG 2

73

72

31

SEG 3

71

32

SEG 4

70

33

SEG 5

69

34

SEG 6

68

(0 , 0 )

35

SEG 7

67

36

SEG 8

66

37

SEG 9

65

38

SEG 10

64

39

SEG 11

61

62

60

63

41 2 42 3 43 4 44 5 45

40

SEG 12

SEG 13

SEG 14

SEG 15

SEG 16

59

58

SEG 17

54

55

56

57

46 7 47 8 48 9 49

SEG 18

SEG 19

SEG 20

SEG 21

53

50

SEG 22

52

51

SEG 23

Chip size: 242 ´ 196 (mil)

2

* The IC substrate should be connected to VDD in the PCB layout artwork.

3 April 21, 2000

Pad Coordinates Unit: mil

Pad No. X Y Pad No. X Y

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 1.06
35 7.69
36 14.32
37 20.95
38 27.58
39 34.21
40 40.84

-115.68

-115.68

-113.69

-114.92

-115.68

-115.68

-115.68

-114.92 -6.29

-114.92 -18.27

-114.92 -24.91

-114.92 -36.89

-114.92 -43.52

-114.92 -55.51

-114.92 -62.13

-114.92 -74.12

-114.92 -80.75

-114.92 -92.74

-105.02 -92.74

-98.39 -92.74

-91.76 -92.74

-85.13 -92.74

-78.50 -92.74

-71.87 -92.74

-65.24 -92.74

-58.61 -92.74

-51.98 -92.74

-45.35 -92.74

-38.72 -92.74

-32.09 -92.74

-25.46 -92.74

-18.83 -92.74

-12.20 -92.74

-5.57 -92.74

77.99 41 47.47

71.36 42 54.10

54.83 43 60.73

46.62 44 67.36

37.10 45 73.99

23.80 46 80.62

4.21 47 87.25
48 93.88
49 100.51
50 107.14
51 113.77
52 114.88 92.74
53 108.25 92.74
54 101.62 92.74
55 94.99 92.74
56 88.36 92.74
57 81.73 92.74
58 75.10 92.74
59 68.47 92.74
60 61.84 92.74
61 55.21 92.74
62 48.58 92.74
63 41.95 92.74
64 35.32 92.74
65 28.69 92.74
66 22.06 92.74
67 15.43 92.74
68 8.80 92.74
69 2.17 92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

70
71
72
73
74
75
76
77
78
79
80

-4.46

-11.09

-17.72

-24.35

-30.98

-37.61

-44.24

-50.87

-57.50

-68.04

-82.71

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

-92.74

92.74

92.74

92.74

92.74

92.74

92.74

92.74

92.74

92.74

92.74

91.97

HT1626

4 April 21, 2000

Pad Description

Pad No. Pad Name I/O Description

The OSCI and OSCO pads are connected to a 32.768kHz crystal
in order to generate a system clock. If the system clock comes

1 OSCI I

2 OSCO O

3 VDD

4 VLCD I LCD operating voltage input pad.

5 IRQ

6, 7 BZ, BZ

8~11 T1~T4 I Not connected

12~27 COM0~COM15 O LCD common outputs

28~75 SEG0~SEG47 O LCD segment outputs

76 CS

77 RD

78 WR

79 DATA I/O Serial data input/output with pull-high resistor

80 VSS

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 instead, the OSCI and OSCO pads can be left open.

Positive power supply

¾

Time base or Watchdog Timer overflow flag, NMOS open drain

O

output

O 2kHz or 4kHz tone frequency output pair

Chip selection input with pull-high resistor. When the CS
logic high, the data and command read from or write to the
HT1626 are disabled. The serial interface circuit is also reset.

I

But if the CS
data and command transmission between the host controller
and the HT1626 are all enabled.

READ clock input with pull-high resistor. Data in the RAM of
the HT1626 are clocked out on the rising edge of the RD

I

The clocked out data will appear on the data line. The host con­troller can use the next falling edge to latch the clocked out data.

WRITE clock input with pull-high resistor. Data on the DATA

I

line are latched into the HT1626 on the rising edge of the WR
signal.

Negative power supply, Ground

¾

is at logic low level and is input to the CS pad, the

HT1626

is

signal.

Absolute Maximum Ratings

Supply Voltage ..............................-0.3V to 5.5V

Input Voltage ................V

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi

mum Ratings² may cause substantial damage to the device. Functional operation of this de
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.

-0.3V to VDD+0.3V

SS

Storage Temperature.................-50°Cto125°C

Operating Temperature ..............-25°Cto75°C

5 April 21, 2000

-

-

HT1626

D.C. Characteristics

Symbol Parameter

V

I

DD1

I

DD2

I

DD11

I

DD22

I

STB

V

V

I

OL1

I

OH1

I

OL1

I

OH1

I

OL2

I

OH2

I

OL3

I

OH3

R

DD

IL

IH

PH

Operating Voltage

Operating Current

Operating Current

Operating Current

Operating Current

Standby Current

Input Low Voltage

Input High Voltage

BZ, BZ, IRQ

BZ, BZ

DATA

DATA

LCD Common Sink Current

LCD Common Source Current

LCD Segment Sink Current

LCD Segment Source Current

Pull-high Resistor

Test Conditions

V

DD

Conditions

¾¾

3V

No load/LCD ON
On-chip RC oscillator

5V

3V

No load/LCD ON
Crystal oscillator

5V

3V

No load/LCD OFF
On-chip RC oscillator

5V

3V

No load/LCD OFF
Crystal oscillator

5V

3V

No load
Power down mode

5V

3V

DATA, WR,CS,RD

5V 0

3V

DATA, WR,CS,RD

5V 4.0

V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V 50 100 150

=0.3V

OL

=0.5V

V

OL

V

=2.7V

OH

V

=4.5V

OH

V

=0.3V

OL

=0.5V

V

OL

V

=2.7V

OH

V

=4.5V

OH

V

=0.3V

OL

=0.5V

V

OL

V

=2.7V

OH

V

=4.5V

OH

V

=0.3V

OL

=0.5V

V

OL

V

=2.7V

OH

V

=4.5V

OH

DATA, WR,CS,RD

Min. Typ. Max. Unit

2.7

¾

155 310

¾

260 420

¾

150 310

¾

250 420

¾

830

¾

20 60

¾
¾¾
¾¾

112

¾

224

¾

0

¾
¾

2.4

¾
¾

0.9 1.8

1.7 3

-0.9 -1.8 ¾

-1.7 -3 ¾

0.9 1.8

1.7 3

-0.9 -1.8 ¾

-1.7 -3 ¾

80 160

180 360

-40 -80 ¾mA

-90 -180 ¾mA

50 100

120 240

-30 -60 ¾mA

-70 -140 ¾mA

100 200 300

Ta=25°C

5.2 V

mA
mA
mA
mA
mA
mA

20

mA

35

mA
mA
mA

0.6 V

1.0 V

3V

5V

mA

¾

mA

¾

mA

mA

mA

¾

mA

¾

mA

mA

¾mA
¾mA

¾mA
¾mA

kW
kW

6 April 21, 2000