Holtek Semiconductor Inc HT1647 Datasheet

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 < 1mAat3V,<2mAat5V

·

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

·

HT1647

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

·

General Description

HT1647 is a peripheral device specially de­signed for I/O type mC used to expand the dis­play 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

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

­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

,WR, DB0~DB3) are

-

-

-

4-Level Gray Scale LCD Controller Product Line Selection Table

HT164X *HT1642 *HT1645 HT1647

COM 88

SEG 32 64

*Under development

Block Diagram

HT1647

16

64

OSCO

OSCI

CS

RD

WR

DB0

DB3

VDD

VSS

BZ

BZ

N ote: C S : C hip selection

Tone Frequency

G enerator

BZ, B Z: Tone outputs
W R, RD: W RITE clock, READ clock
D B 0~D B3: D ata bus
C O M 0~C O M 15, S E G 0~S EG 63: LC D outputs
IR Q : Tim e base or W D T overflow output

C ontrol

&
Tim ing
Circuit

D ispla y R A M

LC D D river/
Bias Circuit

W atchdog Tim er

Tim e Base G enerator

&

COM 0

COM 15

SEG 0

SEG 63

VLCD

IR Q

2 April 21, 2000

Pin Assignment

HT1647

SEG 44

SEG 45

SEG 46

SEG 47

SEG 48

SEG 49

SEG 50

SEG 51

SEG 52

SEG 53

SEG 54

SEG 55

SEG 56

SEG 57

SEG 58

SEG 59

SEG 60

SEG 61

SEG 62

SEG 63

CS
RD

WR
DB0
DB1
DB2
DB3
VSS

OSCI

OSCO

VDD

VLCD

IR Q

BZ
BZ

T1
T2
T3
T4

NC
COM 0
COM 1
COM 2
COM 3
COM 4
COM 5
COM 6
COM 7
COM 8
COM 9

1

H T1647

100 Q FP

30

31 50

COM 10

COM 11

COM 12

COM 13

COM 14

COM 15

SEG 0

SEG 1

SEG 2

SEG 4

SEG 5

SEG 6

SEG 7

SEG 8

SEG 9

SEG 10

SEG 11

SEG 3

SEG 12

81100

80

51

SEG 13

SEG 43
SEG 42
SEG 41
SEG 40
SEG 39
SEG 38
SEG 37
SEG 36
SEG 35
SEG 34
SEG 33
SEG 32
SEG 31
SEG 30
SEG 29
SEG 28
SEG 27
SEG 26
SEG 25
SEG 24
SEG 23
SEG 22
SEG 21
SEG 20
SEG 19
SEG 18
SEG 17
SEG 16
SEG 15
SEG 14

3 April 21, 2000

Pad Assignment

SEG 40

SEG 41

HT1647

SEG 17

SEG 18

SEG 19

SEG 20

SEG 22

SEG 24

SEG 25

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 21

SEG 23

SEG 42

SEG 43

SEG 44

SEG 45

SEG 46

SEG 47

SEG 48

SEG 49

SEG 50

SEG 51

SEG 52

SEG 53

SEG 54

SEG 55

SEG 56

SEG 57

SEG 58

SEG 59

SEG 60

SEG 61

SEG 62

SEG 63

CS

RD

WR

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

99

23

24

25

26762777287829

DB0

DB1

DB2

74

75

73

72

71

70

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

4494459546964797489849

COM 2

COM 3

COM 6

COM 5

COM 4

SEG 16

SEG 15

SEG 14

SEG 13

SEG 12

SEG 11

SEG 10

SEG 9

SEG 8

SEG 7

SEG 6

SEG 5

SEG 4

SEG 3

SEG 2

SEG 1

SEG 0

COM 15

COM 14

COM 13

COM 12

COM 11

COM 10

COM 9

COM 8

COM 7

T4

7930803181328233833484358536863787

COM 0

COM 1

9142924393

(0 , 0 )

38883989409041

DB3

VSS

OSCI

OSCO

VDD

VLCD

BZ

IR Q

BZ

T1T3T2

Chip size: 3865 ´ 3770 (mm)

2

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

4 April 21, 2000

HT1647

Pad Coordinates

Pad No. X Y Pad No. X Y Pad No. X Y

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

1

-1774.50

2

-1779.30

3

-1779.30

4

-1779.30

5

-1779.30

6

-1779.30

7

-1779.30

8

-1779.30

9

-1779.30

-1779.30

-1779.30

-1779.30

-1779.30 -17.20

-1779.30 -149.00

-1779.30 -277.00

-1779.30 -408.80

-1779.30 -536.80

-1779.30 -668.60

-1779.30 -796.60

-1779.30 -928.80

-1779.30 -1056.80

-1779.30 -1189.00

-1690.00 -1375.40

-1690.00 -1515.40

-1690.00 -1651.00

-1430.20 -1599.90

-1294.80 -1599.90

-1149.50 -1599.90

-1013.90 -1599.90

-872.80 -1600.00

-738.30 -1600.00

-600.10 -1600.00

-465.60 -1600.00

1708.30 34

1409.80 35

1281.80 36

1150.00 37 87.40

1022.00 38 235.20

890.20 39 383.40

762.20 40 530.40

630.40 41 678.60

502.40 42 875.00

370.60 43 1003.00

242.60 44 1134.80

110.80 45 1262.80
46 1394.60
47 1522.60
48 1654.40
49 1782.40
50 1775.70
51 1775.70
52 1775.70
53 1775.70
54 1775.70
55 1775.70
56 1775.70
57 1775.70
58 1775.70
59 1775.70
60 1775.70
61 1775.70 15.90 94
62 1775.70 147.70 95
63 1775.70 275.70 96
64 1775.70 407.50 97
65 1775.70 535.50 98
66 1775.70 667.30 99

-331.40 -1600.00

-194.50 -1558.30

-48.00 -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

67 1775.70 795.30
68 1775.70 927.10
69 1775.70 1055.10
70 1775.70 1186.90
71 1775.70 1314.90
72 1775.70 1446.70
73 1775.70 1574.70
74 1775.70 1706.50
75 1471.10 1708.30
76 1343.10 1708.30
77 1211.30 1708.30
78 1083.30 1708.30
79 951.50 1708.30
80 823.50 1708.30
81 691.70 1708.30
82 563.70 1708.30
83 431.90 1708.30
84 303.90 1708.30
85 172.10 1708.30
86 44.10 1708.30
87
88
89
90
91
92
93

-87.70

-215.70

-347.50

-475.50

-607.30

-735.30

-867.10

-995.10

-1126.90

-1254.90

-1386.70

-1514.70

-1646.50

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

Unit: mm

5 April 21, 2000

HT1647

Pad Description

Pad No. Pad Name I/O Description

Chip selection input with pull-high resistor. When the CS
logic high, the data and command read from or write to the
HT1647 are disabled. The serial interface circuit is also reset.

23 CS

24 RD

25 WR

26~29 DB0~DB3 I/O Parallel data input/output with a pull-high resistor

30 VSS

31 OSCI I The OSCI and OSCO pads are connected to a 32.768kHz crystal

32 OSCO O

33 VDD

34 VLCD I Power supply for LCD driver circuit

35 IRQ

36, 37 BZ, BZ

38~41 T1~T4 I Not connected

42~57 COM0~COM15 O LCD common outputs

58~99,
1~22

SEG0~SEG63 O LCD segment outputs

I

But if the CS
data and command transmission between the host controller
and the HT1647 are all enabled.

READ clock input with pull-high resistor. Data in the RAM of
the HT1647 are clocked out on the rising edge of the RD

I

The clocked out data will appear on the data line. The host con
troller 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 HT1647 on the rising edge of the WR
signal.

Negative power supply for logic circuit, ground

¾

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

Positive power supply for logic circuit

¾

Time base or Watchdog Timer overflow flag, NMOS open drain

O

output.

O 2kHz or 4kHz frequency output pair (tristate output buffer)

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

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 device
at other conditions beyond those listed in the specification is not implied and prolonged expo
sure to extreme conditions may affect device reliability.

-0.3V to VDD+0.3V

SS

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

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

6 April 21, 2000

-

-

HT1647

D.C. Characteristics

Symbol Parameter

V

DD

I

DD1

I

DD2

I

DD11

I

DD22

I

STB

V

IL

V

IH

I

OL1

I

OH1

I

OL2

I

OH2

I

OL3

I

OH3

I

OL4

I

OH4

R

PH

Operating Voltage

Operating Current

Operating Current

Operating Current

Operating Current

Standby Current

Input Low Voltage

Input High Voltage

BZ, BZ, IRQ Sink Current

BZ, BZ Source Current

DB0~DB3 Sink Current

DB0~DB3 Source Current

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

DB0~DB3, WR
RD

5V 0

3V

DB0~DB3, WR
RD

5V 4.0

V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V 60 125 180

=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

DB0~DB3, WR
RD

,CS,

,CS,

,CS,

Min. Typ. Max. Unit

2.7

¾

150 250

¾

250 370

¾

135 200

¾

200 300

¾

15 30

¾

50 70

¾

210

¾

310

¾

¾¾

¾¾

0

¾

¾

2.4

¾

¾

1.2 2.5

36

-0.9 -1.8 ¾

-2 -4 ¾

1.2 2.5

36

-0.9 -1.8 ¾

-2 -4 ¾

50 100

100 200

-25 -50 ¾mA

-50 -100 ¾mA

30 60

60 120

-20 -40 ¾mA

-35 -70 ¾mA

150 250 350

Ta=25°C

5.2 V

mA

mA

A

m

mA

mA

mA

mA

mA

1

mA

2

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

7 April 21, 2000

HT1647

A.C. Characteristics

Symbol Parameter

f

SYS1

f

SYS2

f

SYS3

f

LCD1

f

LCD2

f

LCD3

t

COM

f

CLK1

f

CLK2

t

CS

t

CLK

t

r,tf

t

su

t

h

t

su1

t

h1

System Clock

System Clock

System Clock

LCD Frame Frequency

LCD Frame Frequency

LCD Frame Frequency

LCD Common Period

4-Bit Data Clock (WR Pin)

4-Bit Data Clock (RD Pin)

4-Bit Interface Reset Pulse
Width (Figure 3)

WR,RDInput Pulse Width

Rise/Fall Time Serial Data
Clock Width (Figure 1)

Setup Time for DB to WR,
RD

Clock Width (Figure 2)

Hold Time for DB to WR,RD
Clock Width (Figure 2)

Setup Time for CS to WR,RD
Clock Width (Figure 3)

Hold Time for CS to WR,RD
Clock Width (Figure 3)

(Figure 1)

Ta=25°C

Test Conditions

V

DD

3V

5V 24 32 40 kHz

3V

5V

3V

5V

3V

5V 48 64 80 Hz

3V

5V

3V

5V

¾

3V

5V

3V

5V

¾

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

3V

5V

Conditions

On-chip RC oscillator

Crystal oscillator

External clock source

On-chip RC oscillator

Crystal oscillator

External clock source

n: Number of COM

Duty cycle 50%

Duty cycle 50%

CS

Write mode 3.34

Read mode 6.67

Write mode 1.67

Read mode 3.34

¾¾

¾¾

¾¾

¾¾

¾¾

Min. Typ. Max. Unit

22 32 40 kHz

¾

¾

¾

¾

32.768

32.768

32

32

¾

¾

¾

¾

kHz

kHz

kHz

kHz

44 64 80 Hz

64

¾

64

¾

64

¾

64

¾

n/f

¾

¾¾

¾¾

¾¾

¾¾

250

¾

LCD

¾

¾

¾

¾

¾

150 kHz

300 kHz

75 kHz

150 kHz

¾

¾¾ms

¾¾ms

120

120

120

100

100

¾

¾

¾

¾

¾

Hz

Hz

Hz

Hz

sec

ns

ns

ns

ns

ns

ns

8 April 21, 2000