NT7603
Single-Chip 16C X 2L Dot-Matrix LCD Controller / Driver
Features
!
Internal LCD drivers
16 common signal drivers
80 segment signal drivers
!
Maximum display dimensions
16 characters X 2 lines or
32 characters X 1 line
!
Interfaces with 4-bit or 8-bit MPU
!
Versatile display functions provided on chip:
Display Clear, Cursor Home, Display ON/OFF,
Cursor ON/OFF, Character Blinking, Cursor
Shift, and Display Shift
!
Three duty factors, selected by PROGRAM:
1/8, 1/11, and 1/16
!
Displays Data RAM (DD RAM): 80 X 8 bits
(Displays up to 80 characters)
!
Character Generator RAM (CG RAM):
64 X 8 bits for general data,
8
5 X 8 programmable dot patterns, or
4
5 X 10 programmable dot patterns
!
Low voltage reset
!
ITO option for A-type and B-type LCD waveform
!
Character Generator ROM (CG ROM):
2 kinds of CG ROM sizes:
192 characters:
160
5 X 8 dot patterns
32
5 X 10 dot patterns
240 characters:
192
5 X 8 dot patterns
48
5 X 10 dot patterns
Custom CG ROM is also available
!
Built-in power-on reset function
!
Logic power supply: 2.8V ~ 5.5V
!
LCD driver power supply: V1 ~ V5
(V
DD
+ 0.3 - V
DD
- 7.0), divided by Built-in LCD power
division resister.
!
Two oscillator operations
(Freq. = 500KHz - 540KHz):
•
Built-in RC oscillation
•
External clock
!
CMOS Process
!
Available in COG FORM
General Description
The NT7603 is a dot matrix LCD controller and driver LSI
that can operate with either a 4-bit or an 8-bit
microprocessor (MPU). The NT7603 receives control
character codes from the MPU, stores them in an internal
RAM (up to 80 characters) before transforming each
character code into a 5 X 7, 5 X 8, or 5 X 10 dot matrix
character pattern and then displaying the codes on the LCD
panel. The built-in Character Generator ROM consists of
256 different character patterns.
The NT7603 also contains Character Generator RAM where
the user can store 8 different character patterns at run time.
These memory features make the character display flexible.
NT7603 also provides many display instructions to achieve
versatile LCD display functions. The NT7603 is fabricated on
a single LSI chip using the CMOS process, resulting in very
low power requirements.
1
V2.3
NT7603
Pad Configuration
149
150
84
83
166
1
66
67
Item
Chip size
Pad pitch
Pad No.
-
1 - 166
Size
X
5156
70
Y
1349
Unit
µm
2
V2.3
NT7603
Block Diagram
V1
V2
V3
V4
V5
V
DD
GND
OSC1
OSC2
8
RS
7
7
E
CURSOR
ADDRESS
COUNTER
I/O
BUFFER
DATA
REGISTER
(DR)
7
7
DISPLAY
DATA
RAM
(DD RAM)
80 X 8 BITS
8
8
DB7 ~ DB4
4
DB3 ~ DB0
4
BUSY
FLAG
(BF)
CURSOR
/BLINK
CONTROLLER
INSTRUCTION
DECODE
7
TIMING
GENERATOR
LCD DRIVER
VOLTAGE
GENERATOR
OPT_R0
OPT_R1
OPT_LCD
8
TEST
TESTM
INSTRUCTION
REGISTER
(IR)
ADDRESS
COUNTER
7
R/W
16-BIT
SHIFT
REGISTER
16
COMMON
SIGNAL
DRIVER
16
COM1
I
COM16
8
7
8
CHARACTER
GENERATOR
RAM
(CG RAM)
64 X 8 BITS
5
CHARACTER
GENERATOR
ROM (CG ROM)
80-BIT
LATCH
CIRCUIT
80
SEGMENT
SIGNAL
DRIVER
80
SEG1
I
SEG80
5
PARALLER - TO - SERIAL
CONVERTER
TESTD
3
V2.3
NT7603
Pad Description
(Total 166 pads for COG type)
Pad No.
1 - 15
16
17
18
19
20
21
22 - 25
Designation
GND
OSC1
OSC2
V1
V2
V3
V4
V5
OPT_R0,
OPT_R1
V
DD
RS
R/W
E
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
OPT_LCD
TESTD
COM1 - 8
COM9 - 16
SEG1 - 80
TEST
TESTM
GND_OUT
I
O
O
O
O
I
O
P
ITO Option
Test output
LCD panel
LCD panel
LCD panel
Test pin
Test output
No ITO. (Option = 1): B-Type waveform
ITO On. (Option = 0): A-Type waveform
Test data output. (No connect for user)
Common signal output pins, for place on the upper glass
(IC face up)
Segment signal output pins
Test pin (internal pull down) (No connection for user)
LCD driver clock output. (No connection for user)
GND output pin, used for pull-down ITO option
I/O
MPU
Higher 4 tri-state bi-directional data bus for transmitting data
between MPU and NT7603. DB7 is also used as a busy flag.
I/O
MPU
Lower 4 tri-state bi-directional data bus for transmitting data
between MPU and NT7603. Not used during 4-bit operation.
I/O
P
I
O
P
P
P
P
P
Power supply
Power supply
Power supply
Power supply
Power supply
External
Connection
Power supply
GND: 0V
For external clock operation, clock inputs to OSC1
Clock output
Power supply for LCD driver. V
DD
≥
V1
≥
V2
≥
V3
≥
V4
≥
V5
≥
GND
Power supply for LCD driver
Power supply for LCD driver
Power supply for LCD driver
Power supply for LCD driver
The built-in bias resister select:
OPT_R1, OPT_R0: No ITO = 1. ITO on = 0
1, 1:
2.2KΩ;
1, 0:
4KΩ;
0, 1:
6.8KΩ;
0, 0:No built-in bias resistor
V
DD
: +5V
Register select signal
0: Instruction register (write), Busy flag, address counter (read)
1: Data register (write, read)
Read/Write control signal
0: Write
1: Read
Read/Write start signal
Description
26, 28
I
ITO Option
29 - 43
44, 45
46, 47
48, 49
50, 51
52, 53
54, 55
56, 57
58, 59
60, 61
62, 63
64, 65
66
68
164 - 157
69 - 76,
156 - 77
165
166
67, 27
P
I
I
I
Power supply
MPU
MPU
MPU
4
V2.3
NT7603
Functional Description
The NT7603 is a dot-matrix LCD controller and driver LSI. It
operates with either a 4-bit or an 8-bit microprocessor
(MPU). The NT7603 receives both instructions and data
from the MPU. Some instructions set operation modes, such
as the function mode, data entry mode, and display mode;
as well as some control LCD display functions, such as clear
display, restore display, shift display, and cursor. Other
instructions include reading and writing both data and
addresses. All instructions allow users convenient and
powerful functions to control the LCD dot-matrix displays.
Data is written into, and read from the Data Display RAM
(DD RAM) or the Character Generator RAM (CG RAM). As
display character codes, the data stored in the DD RAM
decodes a set of dot-matrix character patterns that are built
into the Character Generator ROM (CG ROM). The CG
ROM, with many character patterns (up to 256 patterns),
defines the character pattern fonts. The NT7603 regularly
scans the character patterns through the segment drivers.
The CG RAM stores character pattern fonts at run time if
users intend to show character patterns that are not defined
in the CG ROM. This feature makes character display
flexible. Other unused bytes can be used as
general-purpose data storage.
The LCD driver circuit consists of 16 common signal drivers
and 80 segment signal drivers allowing a variety of
application configurations to be implemented.
1. 192 Characters:
The CG ROM contains 160 5 X 8 dot character patterns and
32 5 X 10 dot character patterns. The relation between the
character codes and character patterns is shown in Table 1.
The character codes from 00H to 0FH are used to get
character patterns from the CG RAM. Character codes from
10H to 1FH, from 80H to 9FH and 20H map to null character
patterns. Character codes from E0H to FFH are assigned to
generate 5 X 10 dot character patterns, and other codes are
used to generate 5x8 dot character patterns.
2. 240 Characters:
The CG ROM contains 192 5 X 8 dot character patterns and
48 5 X 10 dot character patterns. The relation between the
character codes and character patterns is shown in Table 2.
The character codes from 00H to 0FH are used to get
character patterns from the CG RAM. Character codes from
10H to 1FH and from E0H to FFH are assigned to generate 5
X 10 dot character patterns, and other codes to generate 5 X
8 dot character patterns. Only one null character pattern
exists in this type. Note that the underlined cursor, displayed
on the 8th duty may be obscure if the 8th row of a dot
character pattern is coded. We recommend that users
display the cursor in the blinking mode if they code 5x8 dot
character patterns as their custom CG ROM.
Custom
character
patterns
are
available
by
mask-programming ROM. For convenience of character
pattern development, NOVATEK has developed a
user-friendly editor program for the NT7603 to help
determine the character patterns users prefer. By executing
the program on the computer, users can easily create and
modify their character patterns. By transferring the resulting
files generated by the program through a modem or some
other communication method, the user and NOVATEK will
have established a reliable, fast link for programming the CG
ROM.
Character Generator ROM (CG ROM)
The character generator ROM generates LCD dot character
patterns from the 8-bit character pattern codes. The NT7603
provides 2 CG ROM configurations:
5
V2.3
