ZETTLER DISPLAYSXIAMEN ZETTLER ELECTRONICS CO., LTD.

SPECIFICATIONS FOR
LIQUID CRYSTAL DISPLAYCUSTOMER APPROVAL※ PART NO. : AQM0802A-RN-GBW (ZETTLER DISPLAYS) VER1.0
COMPANYCHOPAPPROVALCUSTOMERCOMMENTSZETTLER DISPLAYS ENGINEERING APPROVALDESIGNED BYCHECKED BYAPPROVED BY

SDF

LIUH

GU ZH

AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

REVISION RECORDREVISIONREVISION DATE

VER1.02014-03-06

PAGE

CONTENTSFIRST ISSUEZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0※ CONTENTS
1.0 GENERAL PECS
2.0 ABSOLUTE MAXIMUM RATINGS
3.0 ELECTRICAL CHARACTERISTICS
4.0 OPTICAL CHARACTERISTICS
5.0 BLOCK DIAGRAM
6.0 PIN ASSIGNMENT
7.0 POWER SUPPLY
8.0 TIMING CHARACTERISTICS
9.0 MECHANICAL DIAGRAM
10.0 RELIABILITY TEST
11.0 DISPLAY INSTRUCTION TABLE
12.0 I2C INTERFACE
13.0 STANDARD CHARACTER PATTERNS
14.0 APPEARANCE CRITERIA
15.0 PRECAUTION FOR USING LCMZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

1.0 GENERAL SPECS
1. Display Format

8*2 Character

2. Power Supply

3.3V

3. Overall Module Size

30.0mm(W) x 19.5mm(H) x max1.8mm(D)1. Viewing Area(W*H)

27.0mm(W) x 10.5mm(H)1. Dot Size (W*H)

0.45mm(W) x 0.50mm(H)2. Dot Pitch (W*H)

0.50mm(W) x 0.55mm(H)3. Character Size (W*H)

2.45mm(W) x 4.35mm(H)4. Character Pitch (W*H)

2.95mm(W) x 4.90mm(H)5. Viewing Direction

6:00 O’Clock

6. Driving Method

1/16Duty,1/5Bias

7. Controller IC

ST7032I-0D or compatible

1. Display Mode

STN(Gray)/Positive/Reflective

1. Backlight Options

NC

1. Operating temperature-20ºC ~ 70ºC

1. Storage temperature-30ºC ~ 80ºC

2. RoHS

RoHS Compliant

2.0 ABSOLUTE MAXIMUM RATINGS
Item

Symbol

Min

Typ

Max

Unit

Operating temperature

Top

-20

-

70

ºC

Storage temperature

Tst

-30

-

80

ºC

Input voltage

Vin

Vss

--

Vdd

V

Supply voltage for logic

Vdd- Vss

2.7

-

5.5

V

Supply voltage for LCD drive

Vdd- Vo

3.0

-

7.0

V

3.0 ELECTRICAL CHARACTERISTICS
3.1 Electrical Characteristics Of LCM
Item

SymbolCondition

Min

Typ

Max

Unit

Power Supply Voltage

Vdd

25ºC

3.1

3.3

3.5

V

Power Supply Current

Idd

Vdd=3.3V

--

0.5

1.0

mA

Input voltage (high)Vih

0.8Vdd--Vdd

V

Input voltage (low)VilPins:(SDA,SCL,XRS
ETB),Vdd=3.3V

0--

0.2Vdd

V

-20ºC

--

--

5.0

25ºC

--

4.5

--

70ºC

4.0

--

--

Recommended
Driving Voltage

LC

Vdd -VoV

3.2 The Characteristics Of LED Backlight(NC)ZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

4.0 OPTICAL CHARACTERISTICS (Ta=25ºC)
Item

SymbolCondition

Min

Typ

Max

Unit

Viewing angle (Left - right)

θ2Cr ≥ 2.0

-35

-

35

deg

Viewing angle (Up-down)

θ1Cr ≥ 2.0

-20

-

35

deg

Contrast RatioCrθ1=0°, θ2=0°

-

6

-

Response time (rise)Trθ1=0°, θ2=0°

-

180

300

ms

Response time (fall)Tfθ1=0°, θ2=0°

-

150

250

ms

(1). Definition of Optical Response Time(2). Definition of Contrast Ratio(3). Definition of Viewing Angle θ2 and θ1

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

5.0 BLOCK DIAGRAM

1.V0
2.VOUT
3.CAP1N
4.CAP1P
5.VDD
6.VSS
7.SDA
8.SCL
9.XRSETB

SEG1-40

SEG1----------SEG40

ST7032iCOM1--------COM16

LCD 8X2

COM16

6.0 PIN ASSIGNMENT
Pin No.

SymbolFunction

1VO

Test PIN for VLCD,leave it open

2

VOUT

DC/DC voltage converter output

3

CAPIN

For voltage booster circuit(VDD-VSS)

4

CAPIP

External capacitor about 0.1u~4.7uf

5

VDD

+3.3V

6

VSS

Ground7

SDA

Serial data input

8

SCL

Serial clock input

9

XRSETB

Chip reset signal. Active when low

7.0 POWER SUPPLY

VDD

1.0uf

VOUT

LCM

CAP1N

1.0uf

VDD

CAP1P
VSS

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

8.0 TIMING CHARACTERISTICSZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

A

D
D

B

E
E

C

F

ZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

4
3
2
1

A

B

C

1

2

3

4

Notes:Unspecified tolerance:± 0.2mm.

5

5

6

6

7

7

8

8

F

9.0 MECHANICAL DIAGRAM

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

10.0 RELIABILITY TEST
Test Item

NO
1High temperaturestorage2

Low temperaturestorage

3

High temperature
Operation

4

Environmental
Test

5

6

Low temperature
OperationHightemperature/High
Humidity Storage

Temperature Cycle

Description
Applying the high storage
temperature Under normal humidity
for a long time Check normal
performance
Applying the low storage temperature
Under normal humidity for a long time
Check normal performance
Apply the electric stress(Volatge andcurrent) Under high temperature fora long time
Apply the electric stress Under low
temperature for a long time
Apply high temperature and highhumidity storage for a long time
Apply the low and high temperature
cycle-30ºC＜＞25ºC＜＞80ºC ＜＞25ºC
30min
10min 30min 10min

Test Condition

Remark

80 ºC
96hrs
-30ºC
96hrs
70 ºC
96hrs
-20ºC
96hrs
90% RH
40ºC
96hrs

Note1
Note1
Note2
Note2

-30ºC/80ºC
10 cycle

1 cycleCheck normal performance

7
Mechanical
Test
8
9

Vibration
test(Package
state)

Applying vibration to product checknormal performance

Shock test(package
state)

Applying shock to product checknormal performance

Freq:10-55Hz
Max
Acceleration 5G
1cycletime:1min time
X.Y.Z direction
for 15 mines
Drop themthrough 70cm
height to strikehorizontal plane

Other

Remark
Note1:Normal operations condition (25ºC±5ºC).
Note2:Pay attention to keep dewdrops from the module during this test.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

11.0 DISPLAY INSTRUCTION TABLEZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

12.0 I2C INTERFACE
It just only could write Data or Instruction to ST7032 by the IIC Interface.
It could not read Data or Instruction from ST7032 (except Acknowledge signal).
SCL: serial clock input
SDA: serial data input

Slaver address could only set to 0111110, no other slaver address could be set
The I C interface send RAM data and executes the commands sent via the I C Interface. It could send data bit to the RAM.
The I C Interface is two-line communication between different ICs or modules. The two lines are a Serial Data line (SDA)
and a Serial Clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor. Data transfer may beinitiated only when the bus is not busy.

BIT TRANSFER
One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the HIGH period of
the clock pulse because changes in the data line at this time will be interpreted as a control signal. Bit transfer is illustrated
in Fig.1.

START AND STOP CONDITIONSBoth data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line, while the clock
is HIGH is defined as the START condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH is definedas the STOP condition (P). The START and STOP conditions are illustrated in Fig.2.

SYSTEM CONFIGURATIONThe system configuration is illustrated in Fig.3.
·Transmitter: the device, which sends the data to the bus·Master: the device, which initiates a transfer, generates clock signals and terminates a transfer·Slave: the device addressedby a master
Multi-Master: more than one master can attempt to control the bus at the same time without corrupting the message·Arbitration: procedure to ensure that, if more than one master simultaneously tries to control the bus, only one is allowed to
do so and the message is not corrupted·Synchronization: procedure to synchronize the clock signals of two or more devices.

ACKNOWLEDGE
Acknowledge is not Busy Flag in I2C interface.
Each byte of eight bits is followed by an acknowledge bit. The acknowledge bit is a HIGH signal put on the bus by thetransmitter during which time the master generates an extra acknowledge related clock pulse. A slave receiver which isaddressed must generate an acknowledge after the reception of each byte. A master receiver must also generate an
acknowledge after the reception of each byte that has been clocked out of the slave transmitter. The device that
acknowledges must pull-down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during
the HIGH period of the acknowledge related clock pulse (set-up and hold times must be taken into consideration). A masterreceiver must signal an end-of-data to the transmitter by not generating an acknowledge on the last byte that has beenclocked out of the slave. In this event the transmitter must leave the data line HIGH to enable the master to generate a STOP
condition. Acknowledgement on the I C Interface is illustrated in Fig.4.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0
I2C Interface protocol
The ST7032 supports command, data write addressed slaves on the bus
Before any data is transmitted on the I C Interface, the device, which should respond, is addressed first. Only one 7-bit
slave addresses (0111110) is reserved for the ST7032. The R/W is assigned to 0 for Write only.
The I C Interface protocol is illustrated in Fig.5.
The sequence is initiated with a START condition (S) from the I 2C Interface master, which is followed by the slave address.
All slaves with the corresponding address acknowledge in parallel, all the others will ignore the I 2C Interface transfer. Afteracknowledgement, one or more command words follow which define the status of the addressed slaves.
A command word consists of a control byte, which defines Co and RS, plus a data byte.
The last control byte is tagged with a cleared most significant bit (i.e. the continuation bit Co). After a control byte with acleared Co bit, only data bytes will follow. The state of the RS bit defines whether the data byte is interpreted as a commandor as RAM data. All addressed slaves on the bus also acknowledge the control and data bytes. After the last control byte,
depending on the RS bit setting; either a series of display data bytes or command data bytes may follow. If the RS bit is set
to logic 1, these display bytes are stored in the display RAM at the address specified by the data pointer. The data pointer is
automatically updated and the data is directed to the intended ST7032i device. If the RS bit of the last control byte is set tologic 0, these command bytes will be decoded and the setting of the device will be changed according to the received
commands. Only the addressed slave makes the acknowledgement after each byte. At the end of the transmission the I 2C
INTERFACE-bus master issues a STOP condition (P).

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0
During write operation, two 8-bit registers are used. One is data register (DR), the other is instruction register(IR)
The data register (DR) is used as temporary data storage place for being written into DDRAM/CGRAM/ICON
RAM, target RAM is selected by RAM address setting instruction. Each internal operation, writing into RAM, isdone automatically. So to speak, after MPU writes data to DR, the data in DR is transferred into
DDRAM/CGRAM/ICON RAM automatically.
The Instruction register (IR) is used only to store instruction code transferred from MPU. MPU cannot use it toread instruction data.
To select register, use RS input in I C interface.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

13.0 STANDARD CHARACTER PATTERNSZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

14.0 APPEARANCE CRITERIA
Item

Description

Dot defects

Scratches
black dot
white dot on
the polarizer
dirty spot andbubblebetween thepolarizer andglass in thedisplay area.

（black/whi
te dot）

black/whiteline defect(straight
line orcurve etc.
Line typedefects)
Chip oncornerFibres inactive area,
scratchesand blackline on theglass orpolarizer.

PictureMA≤0.1

Ignored0.1＜φ≤0.20

2J＞50.20＜φ≤0.25

1

J＞10

MI

J:the distance
between dot and dot.

J:the distance
between dot and dot.

sidestep on
the lower
glass

Crack

Y:width of crack
X:length of crack
L:width of sidestep
T:deepth of crack
Z:thickness of single
glass

0.25＜φ≤0.30

0

0φ>0.30W≤0.01

IgnoredW≤0.02 L≤52

J＞5W≤0.03 L≤4

1

J＞10

W≤0.04 L≤3

0

J＞10

W≤0.05 L≤2

0Y≤1/2L, X≤1

IgnoredY≤1/2L, X≤2

2

Y≤1/2L, X≤3

1

Y≤1/2L, X≤1/3J0J≤3

Y≤1/2L, X≤2/3J

0J≤3

Y≤1/5L X≤5
≤1/2T

Z

IgnoredY≤1/4L X≤5
≤1/2T

Z

2

Y≤1/3L X≤5 Z≤
1/2T

1Y≤1/3L X≤10 Z
≤1/2T

0

Y≤1/3L X≤15 Z
≤1/2T

0

Cracks in any
area

Inspection
MethodVisual/contrast
byInspection
standard
film●

Y:width of chip
X:length of chip
L:width of sidestep
J:distance between
electrode and thefarthermost edge.

Crack

Specification

Visual/contrast
byInspection
standard
film

●

●

Visual/contrast
byInspection
standard
film

Visual/contrast
byInspection
standard
film●

rejected

Visual●Polarizer≤0.8

Accepted

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●

Visual/15

AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0
be applicable forup/bottom polarizer

0.8＜L≤1.0

Rejected

1.0＜L≤1.5

Rejected

1.5＜L≤2.0

Rejected

contrast
byInspection
standard
film

Any seeable polarizer slanting or
excursion in active area will be rejected.
The polarizer edge should be even andbe line. Any indention within 1/3 ofsilkscreen line will be rejected.
Wrong direction, missing or extra,
incorrect sticking for polarizer and dirty
surface(grease) on polarizer will berejected.
seeable black silkscreen line from thearond can be accepted.
Refer to the drawing size requirement.

End seal

L:The distance fromthe block to edge ofglass.

Silkscreenline

UV glue of sealon the glass
surface

Rejected

The UV glue ofseal overflow
into the activearea.

Rejected

Direction ofend seal isdifferent fromthe drawing.

Rejected

Glue capacityof end seal ＜(1/3)*L

Rejected

the height andlength of end
seal is out ofthe drawing
requirements.

Rejectedsilkscreen line
overflow into
the active area.

Rejectedsilkscreen line
deviated in
active area.

Rejected

bubble ofsilkscreen line
≥ 1/3 witdth ofsilkscreen line

Rejected

Visual/contrast
byInspection
standard
film

●

●

ZETTLER DISPLAYS XIAMEN ZETTLER ELECTRONICS CO., LTD.

Visual/contrast
byInspection
standard
film

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0
PIN

Protective
film

Rainbowbackgroud
color

Glue on PIN：there is glue on the PIN
without pin clip will be rejected. PIN glue
solidification：PIN glue doesn't solidify
completely. The sunken or glue stain bytouching will be rejected.
PIN deflection：if deflection angle ＞±
5°，rejected；contrarily, please referto the drawing requirement. Without
continuous glue on pins will be rejected.
PIN glue stains on polarizer or inleakagepolarizer and glass, rejected.
PIN glue exceeds the up polarizer,
rejected.
Missing or extra, broken pin, rejected.
PIN loosen：no permission for pin looseor drop.
Clip
PIN:pin center exceeds 1/3 ITO width，
rejected.
No pinglue, rejected.
UV glue
range: UV glue must be exceeded over1~1.5 pin distance from both side. if not,rejected.
PIN length and direction
must be same with the drawing
requirements.
LCD protective film can not stick on thepolarizer and the product protective film
raised ≤1/3 length or width of polarizer
from same direction of axis and its total
length should be ≤15mm . This defectcan be accepted.
rainbow is not in
active area.

Accepted

Rainbow inactive area.

Rejected

with obvious
discoloration
and unevencolor.

Rejected

There areobvious different
backgroundcolor from thesame productlot.

Rejected

Visual/contrast
byInspection
standard
film●

Visual●Visual/co
ntrast by
goldensample●●Visual/co
ntrast by
goldensampleNOTE:
Inspection condition:
Viewing distance for cosmetic inspection is 30cm with bare eyes, and under an environment of 800 lux(20W*2--40W) light intensity, all directions for inspecting the sample should be within 45° against perpendicular

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0

15.0 PRECAUTION FOR USING LCM
1. When design the product with this LCD Module, make sure the viewing angle matches to its purpose of usage.
2. As LCD panel is made of glass substrate, Dropping the LCD module or banging it against hard objects may cause
cracking or fragmentation. Especially at corners and edges.
3. Although the polarizer of this LCD Module has the anti-glare coating, always be careful not to scratch its surface. Useof a plastic cover is recommended to protect the surface of polarizer.
4. If the LCD module is stored at below specified temperature, the LC material may freeze and be deteriorated. If it isstored at above specified temperature, the molecular orientation of the LC material may change to Liquid state and it
may not revert to its original state. Excessive temperature and humidity could cause polarizer peel off or bubble.
Therefore, the LCD module should always be stored within specified temperature range.
5. Saliva or water droplets must be wiped off immediately as those may leave stains or cause color changes if remained
for a long time. Water vapor will cause corrosion of ITO electrodes.
6. If the surface of LCD panel needs to be cleaned, wipe it swiftly with cotton or other soft cloth. If it is not still clean
enough, blow a breath on the surface and wipe again.
7. The module should be driven according to the specified ratings to avoid malfunction and permanent damage.
Applying DC voltage cause a rapid deterioration of LC material. Make sure to apply alternating waveform bycontinuous application of the M signal. Especially the power ON/OFF sequence should be kept to avoid latch-up ofdriver LSIs and DC charge up to LCD panel.
8. Mechanical Considerationsa) LCM are assembled and adjusted with a high degree of precision. Avoid excessive shocks and do not make any
alterations or modifications. The following should be noted.
b) Do not tamper in any way with the tabs on the metal frame.
c) Do not modify the PCB by drilling extra holes, changing its outline, moving its components or modifying its
pattern.
d) Do not touch the elastomer connector; especially insert a backlight panel (for example, EL).
e) When mounting a LCM makes sure that the PCB is not under any stress such as bending or twisting. Elastomer
contacts are very delicate and missing pixels could result from slight dislocation of any of the elements.
f) Avoid pressing on the metal bezel, otherwise the elastomer connector could be deformed and lose contact,
resulting in missing pixels.
9. Static Electricitya) Operator
Ware the electrostatics shielded clothes because human body may be statically charged if not ware shielded clothes. Never
touch any of the conductive parts such as the LSI pads; the copper leads on the PCB and the interface terminals with any
parts of the human body.
b) Equipment
There is a possibility that the static electricity is charged to the equipment, which has a function of peeling or friction action(ex: conveyer, soldering iron, working table). Earth the equipment through proper resistance (electrostatic earth: 1x108
ohm).
Only properly grounded soldering irons should be used.
If an electric screwdriver is used, it should be well grounded and shielded from commutator sparks.
The normal static prevention measures should be observed for work clothes and working benches; for the latter
conductive (rubber) mat is recommended.
c) Floor
Floor is the important part to drain static electricity, which is generated by operators or equipment.
There is a possibility that charged static electricity is not properly drained in case of insulating floor. Set the electrostatic
earth (electrostatic earth: 1x108 ohm).
d) Humidity
Proper humidity helps in reducing the chance of generating electrostatic charges. Humidity should be kept over 50%RH.
e) Transportation/storage
The storage materials also need to be anti-static treated because there is a possibility that the human body or storage materials
such as containers may be statically charged by friction or peeling.
The modules should be kept in antistatic bags or other containers resistant to static for storage.
f) Soldering
Solder only to the I/O terminals. Use only soldering irons with proper grounding and no leakage.
Soldering temperature : 280°C ± 10°C
Soldering time: 3 to 4 sec.
Use eutectic solder with resin flux fill.

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AQM0802A-RN-GBW(ZETTLER DISPLAYS) CHARACTER MODULE VER1.0
If flux is used, the LCD surface should be covered to avoid flux spatters. Flux residue should be removed afterwards.
g) Others
The laminator (protective film) is attached on the surface of LCD panel to prevent it from scratches or stains. It should bepeeled off slowly using static eliminator.
Static eliminator should also be installed to the workbench to prevent LCD module from static charge.
10. Operationa) Driving voltage should be kept within specified range; excess voltage shortens display life.
b) Response time increases with decrease in temperature.
c) Display may turn black or dark blue at temperatures above its operational range; this is (however not pressing
on the viewing area) may cause the segments to appear “fractured”.
d) Mechanical disturbance during operation (such as pressing on the viewing area) may cause the segments toappear “fractured”.
11. If any fluid leaks out of a damaged glass cell, wash off any human part that comes into contact with soap and water.
The toxicity is extremely low but caution should be exercised at all the time.
12. Disassembling the LCD module can cause permanent damage and it should be strictly avoided.
13. LCD retains the display pattern when it is applied for long time (Image retention). To prevent image retention, do not
apply the fixed pattern for a long time. Image retention is not a deterioration of LCD. It will be removed after display
pattern is changed.
14. Do not use any materials, which emit gas from epoxy resin (hardener for amine) and silicone adhesive agent(dealcohol or deoxym) to prevent discoloration of polarizer due to gas.
15. Avoid the exposure of the module to the direct sunlight or strong ultraviolet light for a long time.

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