SPECIFICATIONS FOR
LIQUID CRYSTAL DISPLAY
MGD2004B-NSW-BBS-01
DATE：2009-12-11
DOC VER：1.0
P/N:MGD2004B-NSW-BBS-01 11/12/2009 VER: 1.0
MGD2004B SERIES LCD MODULE
1.0 MECHANICAL SPECS
1. Overall Module Size 84.0mm(W) x 44.0mm(H) x max 11.5mm(D)
2. Dot Size 0.42mm(W) x 0.46mm(H)
3. Dot Pitch 0.47mm(W) x 0.51mm(H)
4. Duty 1/16
5. Controller IC ST7066U or Equivalent
6. LC Fluid Options STN
7. Polarizer Options Negative Blue and Transmissive
8. Viewing Angle 6:00 o'clock
9. Backlight Options LED(White)
Standard temp.:(Operating: 0ºC ~ 50ºC; Storage:-20ºC ~
10. Temperature Range Options
70ºC)
2.0 ABSOLUTE MAXIMUM RATINGS
Item Symbol Min Typ Max Unit
Operating temperature (Standard) Top 0 - 50 ºC
Storage temperature (Standard) Tst -20 - 70 ºC
Input voltage Vin Vss Vdd V
Operating temperature (Wide temperature) Top -20 - 70 ºC
Storage temperature (Wide temperature) Tst -30 - 80 ºC
Supply voltage for logic Vdd- Vss 2.7 - 5.5 V
Supply voltage for LCD drive Vdd- Vo 3.0 4.6 6.5 V
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MGD2004B SERIES LCD MODULE
3.0 ELECTRICAL CHARACTERISTICS
Item Symbol Condition Min Typ Max Unit
Vdd fosc=270kHz -- 5.0 -- V
Power Supply Valtage
Vdd=5.0V, -
Power Supply Current Idd 2.0 3.0 mA
fosc=270kHz
0ºC - 4.8 5.4
Recommended LC Driving Vdd - Vo 25ºC 4.2 4.5 - V
Voltage (Standard Temp)
50ºC 3.9 4.3 -
-20ºC - 6.4 7.2
Recommended LC Driving 0ºC - 4.8 -
Vdd -Vo V
Voltage (Wide Temp)
50ºC - 4.2 -
70ºC 3.5 4.0 -
BackLight Power Supply Vf R=0Ω - 5.0 5.5 V
Voltage
BackLight Power Supply If R=0Ω - 40 - mA
Current
4.0 OPTICAL CHARACTERISTICS (Ta=25ºC, Vdd= 5.0V±0.5V, STN LC fluid)
Item Symbol Condition Min Typ Max Unit
Viewing angle (horizontal) θ Cr ≥ 2.0 -60 - 35 deg
Viewing angle (vertical) φ Cr ≥ 2.0 -40 - 40 deg
Contrast Ratio Cr φ=0°, θ=0° - 6 -
Response time (rise) Tr φ=0°, θ=0° - 150 250 ms
Response time (fall) Tf φ=0°, θ=0° - 150 250 ms
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MGD2004B SERIES LCD MODULE
5.0 BLOCK DIAGRAM
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MGD2004B SERIES LCD MODULE
6.0 PIN ASSIGNMENT 7.0 POWER SUPPLY
Pin No. Symbol Function Vdd
1 Vss Ground
2 Vdd +5.0V Vo Vr +5.0V
3 Vo LCD contrast adjust
4 RS Register select
Vss
5 R/W Read / write
6 E Enable
STANDARD TEMP RANGE
7 DB0 Data bit 0
8 DB1 Data bit 1
9 DB2 Data bit 2 Vdd
10 DB3 Data bit 3
11 DB4 Data bit 4 Vo Vr +5.0V
12 DB5 Data bit 5 -5.0V
13 DB6 Data bit 6 Vss
14 DB7 Data bit 7
15 A Power Supply for +5.0V WIDE TEMP RANGE
16 K Power Supply for VSS Vr = 10KΩ ~ 20KΩ
8.0 TIMING CHARACTERISTICS
Item Symbol Test Condition Min. Typ. Max. Unit
Enable cycle time tC Fig. a, Fig. b 500 - - ns
Enable pulse width tW Fig. a, Fig. b 220 - - ns
Enable rise/fall time tR , tF Fig. a, Fig. b - - 25 ns
RS, R/W set up time tSU Fig. a, Fig. b 40 - - ns
RS, R/W hold time tH Fig. a, Fig. b 10 - - ns
Data delay time tD Fig. b - - 120 ns
Data set up time tDSU Fig. a 60 - - ns
Data hold time tDH Fig. a, Fig. b 20 - - ns
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MGD2004B SERIES LCD MODULE
VIH1 VIH1
RS VIL1 VIL1
t SU tH
R/W V IL1 VIL1
tW tH
tF
VIH1 VIH1
E
VIL1 VIL1 VIL1
tR t DSU t DH
VIH1 VIH1
DB0~DB7 Valid Data
VIL1 VIL1
tC
Fig. a Interface timing (data write)
VIH1 VIH1
RS VIL1 VIL1
t SU tH
V IH1 VIH1
R/W
tW tH
tF
VIH1 VIH1
E
VIL1 VIL1 VIL1
tR
t DSU t DH
tD
VIH1 VIH1
DB0~DB7 Valid Data
VIL1 VIL1
tC
Fig. b Interface timing (data read)
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MGD2004B SERIES LCD MODULE
9.0 MECHANICAL DIAGRAM
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MGD2004B SERIES LCD MODULE
10.0 RELIABILITY TEST
Evaluations and Assessment*
Storage Condition Content Current Oozing Contrast Other Appearances
Consumption
Operation at high 40ºC,90% Twice initial none More than 80% of No abnormality
temperature and RH,240hrs value or less initial value
humidity
High temperature 60ºC, Twice initial none More than 80% of No abnormality
storage 240hrs value or less initial value
Low temperature -20ºC, Twice initial More than 80% of No abnormality
storage 240hrs value or less initial value
*Evaluations and assessment to be made two hours after returning to room temperature (25ºC±5ºC).
*The LCDs subjected to the test must not have dew condensation.
11.0 DISPLAY CHARACTER ADDRESS
20*4 Module DDRAM Address:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53
14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27
54 55 56 56 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67
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MGD2004B SERIES LCD MODULE
12.0 DISPLAY INSTRUCTION TABLE
COMMAND R R/ DB DB DB DB DB DB DB DB DESCRIPTION Executing
S W 7 6 5 4 3 2 1 0 time
fosc=250khz
Clear Display 0 0 0 0 0 0 0 0 0 1 Clears Display & Returns to Address 0. 1.64ms
Cursor at 0 0 0 0 0 0 0 0 1 x Returns Cursor to Address 0. Also 1.64ms
Home returns the display being shifted to the
original position. DDRAM contents
remain unchanged.
Entry Mode 0 0 0 0 0 0 0 1 I/D S I/D: Set Cursor Moving Direction
Set I/D=1: Increment 40µs
I/D=0: Decrement
S: Specify Shift of Display
S=1: The display is shifted
S=0: The display is not shifted
Display 0 0 0 0 0 0 1 D C B Display D=1: Display on
ON/OFF D=0: Display off 40µs
Control Cursor C=1: Cursor on
C=0: Cursor off
Brink B=1: Brink on
B=0: Brink off
Cursor / 0 0 0 0 0 1 S/C R/L x x Moves cursor or shifts the display w/o 40µs
Display changing DD RAM contents
Shift S/C=0: Cursor Shift (RAM unchanged)
S/C=1: Display Shift (RAM unchanged)
R/L=1: Shift to the Right
R/L=0: Shift to the Left
Function 0 0 0 0 1 DL N F x x Sets data bus length (DL), # of display
Set lines (N), and character fonts (F).
DL=1: 8 bits F=0: 5x7 dots 40µs
DL=0: 4 bits F=1: 5x10 dots
N=0: 1 line display
N=1: 2 lines display
Set CG RAM 0 0 0 1 Character Generator (CG) RAM Sets CG RAM address. CG RAM data 40µs
Address Address is sent and received after this
instruction.
Set DD RAM 0 0 1 Display Data (DD) RAM Address / Sets DD RAM address. DD Ram data 40µs
Address Cursor Address is sent and received after this
instruction.
Busy Flag / 0 1 B Address counter used for both DD & Reads Busy Flag (BF) and address 40µs
Address Read F CG RAM address counter contents.
Write Data 1 0 Write Data Writes data into DDRAM or CGRAM. 46µs
Read Data 1 1 Read Data Reads data from DDRAM or CGRAM. 46µs
X: Don't Care
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MGD2004B SERIES LCD MODULE
13.0 STANDARD CHARACTER PATTERNS
Note: The character generator RAM is the RAM with which the user can rewrite character patterns by program.
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