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PDF ( 数据手册 , 数据表 ) NT3881DF-02

零件编号 NT3881DF-02
描述 Dot Matrix LCD Controller and Driver
制造商 ETC
LOGO ETC LOGO 


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NT3881DF-02 数据手册, 描述, 功能
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







NT3881DF-02 pdf, 数据表
NT3881D
DC Electrical Character (continued)
Symbol
Parameter
Min. Typ. Max. Unit
Conditions
Applicable Pin
External Clock Operation
fCP External Clock Operating
Frequency
125 270 350 KHz
tDUTY External Clock Duty Cycle
tRCP External Clock Rise Time
tFCP External Clock Fall Time
Internal Clock Operation (RC Oscillator)
45 50 55 %
0.1 - 0.5 µs
0.1 - 0.5 µs
fOSC Oscillator Frequency
190 270 350 KHz Rf = 91KΩ ± 2%
Internal Clock Operation (Ceramic Resonator Oscillator)
fOSC Oscillator Frequency
VLCD1
VLCD2
LCD Driving Voltage
245 250 255 KHz Ceramic resonator
4.6 1/5 bias
3.0 - VDD V VDD- V5 1/4bias
AC Characteristics
Read Cycle (VDD = 5.0V, GND = VEE = 0V, TA = 25°C)
Symbol
Parameter
Min.
tCYCE
Enable Cycle Time
500
tWHE Enable "H" Level Pulse Width
300
tRE, tFE Enable Rise/Fall Time
tAS RS, R/W Setup Time
-
601
1002
tAH RS, R/W Address Hold Time
10
tRD Read Data Output Delay
-
tDHR Read Data Hold Time
20
Typ.
-
-
-
-
-
-
-
Max.
-
-
25
-
-
190
-
Unit
ns
ns
ns
Conditions
Figure 1
Figure 1
Figure 1
ns Figure 1
ns Figure 1
ns Figure 1
ns Figure 1
8 V2.4







NT3881DF-02 equivalent, schematic
NT3881D
Instruction Set
Instruction
Code
Function
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Display Clear 0 0 0 0 0 0 0 0 0
Display/
Cursor Home 0 0 0 0 0 0 0 0 1
Entry Mode
Set 0 0 0 0 0 0 0 1 I/D
Display
ON/OFF
00 0 0 0 0 1 D C
Display/
0 0 0 0 0 1 S/C R/L *
Cursor Shift
Function Set 0 0 0 0 1 DL N F *
RAM
00 0 1
Address Set
ACG
DD RAM
00
Address Set
1
ADD
Busy Flag/
Address
Counter
Read
0 1 BF
AC
CG RAM/
DD RAM
Data Write
10
Write data
CG RAM/
DD RAM
Data Read
11
Read data
Note 1: Symbol "*" signifies an insignificant bit (disregard).
Note 2: Correct input value for "N" is predetermined for each model.
Clear entire display area,
1 restore display from shift, and
load address counter with DD
RAM address 00H.
Restore display from shift and
* load address counter with DD
RAM address 00H.
Specify direction of cursor
movement and display shift
S mode. This operation takes
place after each data transfer
(read/write).
Specify activation of display
B (D) cursor (C) and blinking of
character at cursor position
(B).
* Shift display or move cursor.
Set interface data length (DL),
* number of display line (N), and
character font (F).
Load the address counter with
a CG RAM address.
Subsequent data access is for
CG RAM data.
Load the address counter with
a DD RAM address.
Subsequent data access is for
DD RAM data.
Read Busy Flag (BF) and
contents of Address Counter
(AC).
Write data to CG RAM or DD
RAM.
Read data from CG RAM or
DD RAM.
Execution
time (max)
(fOSC =
250KHz)
1.64ms
1.64ms
40µs
40µs
40µs
40µs
40µs
40µs
0µs
40µs
40µs
16 V2.4










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