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PDF NT3881DH-01 Data sheet ( Hoja de datos )
| Número de pieza | NT3881DH-01 | |
| Descripción | Dot Matrix LCD Controller and Driver | |
| Fabricantes | ETC | |
| Logotipo |  |
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NT3881D
Dot Matrix LCD Controller and Driver
Features
! Internal LCD drivers
16 common signal drivers
40 segment signal drivers
(can be externally extended to 400 segments
using NT3882)
! Maximum display dimensions
40 characters * 2 lines or
80 characters * 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, 11/11, 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
! NOVATEK Identification code
! Bonding option for A-type and B-type waveform
! Character Generator ROM (CG ROM):
3 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
256 characters:
192 5 X 8 dot patterns
64 5 X 10 dot patterns
Custom CG ROM is also available
! Built-in power-on reset function
! Logic power supply: single +5V supply
! LCD driver power supply: V1 - V5
(VDD+0.3 - VDD-13.5)
! Three oscillator operations
(Freq. = 250KHz - 270KHz):
• Internal oscillation
• Ceramic resonator
• External clock
! CMOS Process
! Available in 80-pin QFP or in CHIP FORM
General Description
The NT3881D is a dot matrix LCD controller and driver
LSI that can operate with either a 4-bit or an 8-bit
microprocessor (MPU). NT3881D receives control
character codes from the MPU, stores them in an internal
RAM (up to 80 characters), transforms each character
code into a 5 X 7, 5 X 8, or 5 X 10 dot matrix character
pattern, and then displays the codes on the LCD panel.
The built-in Character Generator ROM consists of 256
different character patterns.
The NT3881D also contains Character Generator RAM
where the user can store 8 different character patterns at
run time. These memory features make character display
flexible. NT3881D also provides many display instructions
to achieve versatile LCD display functions. The NT3881D
is fabricated on a single LSI chip using the CMOS
process, resulting in very low power requirements.
With several NT3882 driver ICs connected to the
NT3881D, up to 80 characters can be displayed.
1 V2.4
1 page  
NT3881D
Pin and Pad Descriptions
Pin and Pad No.
Designation
I/O
External
Connection
Description
1 - 22
SEG22 - SEG1
O
LCD panel Segment signal output pins
24, 25
OSC1, OSC2
Pins connected to resistor or ceramic filter for
internal clock oscillation. For external clock
operation, clock inputs to OSC1.
26 - 30
V1 - V5
P Power supply Power supply for LCD driver
31
CL1
O
NT3882
Clock to latch serial data D sent to NT3882.
32
33, 81
23
CL2
VDDB, VDDA
GND
O
NT3882
Clock to shift serial data D
P Power supply VDD: +5V
A-Type waveform: VDD bond to VDDA
B-Type waveform: VDD bond to VDDB
P Power supply GND: 0V
34
M
O
NT3882
Switch signal to convert LCD drive waveform to
AC
35
D
O
NT3882
Character pattern data corresponding to each
common signal is transmitted serially from this
output. 0-Non selection, 1-selection.
36
RS
I
MPU
Register select signal
0: Instruction register (write)
Busy flag, address counter (read)
1: Data register (write, read)
37
R/W
I
MPU
Read/Write control signal
0: Write
1: Read
38
E
I
MPU
Read/Write start signal
39 - 42
DB0 - DB3
I/O
MPU
Lower 4 tri-state bi-directional data bus for
transmitting data between MPU and NT3881D.
Not used during 4-bit operation.
43 - 46
DB4 - DB7
I/O
MPU
Higher 4 tri-state bi-directional data bus for
transmitting data between MPU and NT3881D.
DB7 is also used as busy flag.
47 - 62
COM1 - COM16
O
LCD panel Common signal output pins
63 - 80
SEG40 - SEG23
O
LCD panel Segment signal output pins
5 V2.4
5 Page 
NT3881D
Timing Waveforms (continued)
Interface Signals with Segment Driver LSI
CLK1
0.9 VDD
0.9 VDD
CLK2
D
M
0.1 VDD
tCWH
tCSU
0.9 VDD
tCSU
tCWH
0.1 VDD
0.9 VDD
tCWL
0.1 VDD
0.9 VDD
0.1 VDD
tSU
0.9 VDD
0.1 VDD
tDH
0.1 VDD
tDM
Figure 3. Sending Data to Segment Driver LSI NT3882
Interface Signals with Segment Driver LSI (continued)
VDD
0.2V
0.1ms > tRON > 10ms
tRON
4.5V
0.2V
tOFF > 1ms
tOFF
0.2V
Figure 4. tOFF stipulates the time of power OFF for instantaneous
power supply to or when power supply repeats ON and OFF.
Note 1: The NT3881D has three clock options:
A. Internal Oscillator Operation (With Ceramic Filter)
OSC1
OSC2
Rf : 1MΩ ± 10%
Rd : 3.3KΩ ± 5%
C1 = C2 : 680pF ± 10%
CERAMIC
FILTER
C1 C2
11 V2.4
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet NT3881DH-01.PDF ] | |
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