MINILOGIC ML2002-2U

ML2002 Preliminary
ML2002 Series Static/Half Duty LCD COG Driver
Application
Features
General Purpose Clock
High quality instrument
Telephone, mobile phone
Automotive
Handheld Device like PDA, MP3, or PMP
A Gold Bump Chip which can reduce pin count and area.
Simplest design with no charge pump to supply high voltage to
LCD
Only 5 pin is needed which can reduce space.
Low operating current
Can disable internal clock to reduce current.
Wide Logic & LCD power supply: 2.5V to 6.0V
No need to add external voltage regulator
Static or 1/2 Duty driving with 1/2 Bias
Number of segments: (Static) 48, (1/2 Duty) 96
Cascading structure to increase the number of driving
segments, it’s more flexible for different application.
Build-in LCD voltage driver, crystal oscillator,
internal RC oscillator and display control circuit.
Offer best contrast and widest viewing angle of TN LCD
technology especially in static mode.
No temperature compensation is needed for Topr = -40oC to 80oC.
General Description
ML2002 (COG) LCD driver can be cascaded to increase the number of segments drive, with Static
driving it can form a single piece of 48 (1 ICs) or 96 (2 ICs cascaded) segments driver. With 1/2 Duty, the
number of segment drive would be doubled. It targets at custom TN LCD COG Module product which
requires the best quality of TN LCD technology and small to medium number of segment display.
ML2002 series driver offers the best contrast, the widest viewing angle, the widest range of operating
voltage and temperature when compared to the high duty cycle driver. EMI and Noise protection circuit
has been added which tailor made for COG application.
Ordering Information
Part Number
Description
Package Form
ML2002-1U
One ML2002 LCD driver
Gold Bump Die
ML2002-2U
Two ML2002 LCD driver
Gold Bump Die
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Block Diagram
Absolute Maximum Ratings
Parameter
Symbol Condition
MIN
MAX
Unit
Supply voltage
VDD
-0.5
+6.0
V
Supply Current
IDD
-50
+50
mA
Input Voltage
VIN
GND-0.3
VDD +0.3
V
Output Voltage
VOUT
GND-0.3
VDD +0.3
V
DC input Current
IIN
-10
+10
mA
DC output Current
IOUT
-10
+10
mA
Storage temperature
Tstg
-65
+150
o
Total power dissipation
Ptot
-
400
mW
VDD = 3V, no Load
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DC Characteristic
VDD = 3.0V; Tamb = 25oC ; unless otherwise specified
Parameter
Symbol Condition
Supplies
Supply voltage
VDD
Supply Current
IDD
Disable Oscillator and
1/2 PVDD opamp
Supply Current
IDD
Enable Oscillator
Supply Current
IDD
Enable Oscillator and
Internal 1/2 PVDD
opamp
Logic
LOW-level input voltage VIL
HIGH-level input voltage VIH
LOW-level output current IOL
VOL = 1.0V
HIGH-level output
IOH
VOH = 2.0V
current
LCD outputs
Output resistance at pads RSEG
S1 to S40
Output resistance at pads RCOM
COM1A and COM1B
MIN
TYP
MAX
Unit
2.5
-
0.1
6.0
0.5
V
uA
-
25
80
60
100
uA
uA
GND
0.7*VDD
1
-1
-
0.3*VDD
VDD
-
V
V
mA
mA
-
85
150
ohm
-
45
100
ohm
MIN
21
TYP
32
MAX
48
Unit
kHz
0.4
-
-
us
0.4
-
-
us
-
-
10
us
-
-
10
us
1
-
250
kHz
AC Characteristic
VDD =3.0V; Tamb = 25oC; unless otherwise specified
Parameter
Symbol Conditions
Oscillator frequency at
foout
pad OOUT
FIN, LOAD, DIN, DCLK tH
High time
FIN, LOAD, DIN, DCLK tL
Low time
FIN, LOAD, DIN, DCLK tr
Rise time
FIN, LOAD, DIN, DCLK tf
Fall time
DCLK Frequency
FDCLK
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Timing Diagram for slave mode display
With MS connected to GND, it represents it is in slave mode, it will treat all the DIN data as display data
and will be sent to ML2002’s display shift register directly through DIN and DCLK.
To Load display data onto the screen, LAI need to be high, then a rising edge of DCLK would load the
display, the LAI need to keep low again.
Functional Description
There are 48 Segments in Static Mode, and 96 Segments in 1/2 Duty Mode with 1/2 Bias. The display
data should be input in reverse order, for static it’s starting from SEG48, SEG47… SEG2 to SEG1, for
1/2 duty it’s starting from SEG48-COMB, SEG48-COMA … SEG1-COMB to SEG1-COMA for proper
display of data. When updating the display, it will require inputting 48 Segments in Static Mode and 96
Segments in 1/2 Duty Mode.
i) Internal Power on reset
At power on the ML2002 will reset the internal display Data RAM as cleared.
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ii) Oscillator
The LCD driving signal of ML2002 is clocked either by the built-in oscillator, crystal oscillator or from
an external clock.
a) Internal clock
When the internal oscillator is used, BIOEN should be connected to GND and the OOUT should be
connected to FIN. The internal oscillator will oscillate at 32 kHz and the frequency is independent in the
range of 2.5V < VDD < 6.0V . Then connect OOUT to FIN.
b) Crystal clock
When using the crystal oscillator, BCOEN is connected to GND, then connect
the crystal to OSC+, and OSC-. Then connect OSC- to FIN. The OSC+ and
OSC- should connect as:
c) External clock
When using an external clock, BCOEN & BIOEN is connected to VDD then connects the external clock
to FIN (32 KHz) or LCLK (125Hz)
iii) Timing
ML2002 have several frequencies of clock signal for the users to choose for the LCD display clock (ie.
LCLK) and the blink clock (ie.BCLK). They include the following clock signals:
Frequency of Clock Signal at FIN = 32 kHz
256/128 Hz
128/64 Hz
4 Hz
2 Hz
1 Hz
Actual Divider of FIN
1/256(1/2 Duty) or 1/128(Static)
1/128(1/2 Duty) or 1/64(Static)
1/8192
1/16384
1/32768
Target Input Pin
LCLK
BCLK
iv) Segment outputs
ML2002 has 48 segment outputs which should be connected directly to the LCD. If less than 48 segments,
the unused segments should be left open circuit.
v) Common outputs
ML2002 consists of 2 common signals (ie. COM1A & COM1B). The common outputs should be left
open-circuit if the outputs are unused. Users can disable the COM1A and COM1B by connecting the
CEN1A and CEN1B to VDD respectively. The common outputs will change to GND after disabling it.
vi) Blink
ML2002 has a blink function that users shall connect BEN to GND and input the blink clock (ie. BCLK)
either by connecting ML2002 output clock signal from Frequency Divider or an external clock signal.
Users shall disable blink function by connecting BEN to VDD.
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Pad Configuration
Chip Size :
Part Number Description
Chip Size
ML2002-1U
One ML2002 LCD driver
3660 x 660
ML2002-2U
Two ML2002 LCD driver
7320 x 660
Chip Thickness : 700 um + 25 um
Gold Bump Pad Size : 32 um x 72 um
Gold Bump Height : 18 um + 2 um
Note :
The die faces up in the diagram
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* Pad Orientation and Alignment Mark:
Note: Pad 1, 49 and 50 are DUM Pads which must be open.
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Application Circuit
ML2002 Single Chip Connection
1. ML2002 1U Static Slave Mode
2. ML2002 1U 1/2 Duty Slave Mode
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ML2002 Cascode Structure Connection
1. ML2002 2U 1/2Duty-1/2Duty Slave-Slave Mode
Working Glass Size:
Length = 64.80 V.A
Width = 35.40 V.A
(Unit: mm)
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2. ML2002 2U Static Slave-Slave Mode
Working Glass Size:
Length = 76.00 V.A
Width = 59.95 V.A
(Unit: mm)
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Pin Description
SYMBOL
PAD
BRES
I
I
I
I
I
I/O
O
LGND
INT
LVDD
MS
DIN
DCLK
LAI
LAO
CEI
CEO
DOUT
CNT
Q15
FIN
4,2,1Hz
256/125 Hz
125/62 Hz
LCLK
SEG1 .. SEG48
COM1A / B
PVDD
1/2 PVDD
1/2 Duty
CEN1A , CEN1B
T0
OOUT
COEN
IOEN
HPVDDEN
BEN
BCLK
OSC+ / SYNC
TFI
SYEN
TOUT
DUM1,2,3
DESCRIPTION
I
O
O
I
O
I
O
O
O
I
O
O
I
I
I
I
O
I
I
External reset input (active LOW)
Logic Ground
Alarm interrupt output
Logic Supply voltage
Input “0”, for slave mode
Data line input
Data clock input
It is an input pin which LOAD the display onto the LCD screen during rising edge.
Send out LOAD signal to the cascade slave ML2002 for displaying data onto LCD
screen.
Enable Chip for receive data/command in the DIN pin
Send out chip enable signal to the following cascade slave IC
Data output from the display data RAM
Input clock, count number of rising edge clock
Output High on the 16th clock from CNT
32768Hz Oscillator input
4, 2, 1Hz clock output
125Hz clock output for static/ 250 clock output for 1/2 duty
62Hz clock output for static/125 clock output for 1/2 duty
LCD Clock signal frequency
Segment output
Common output
Power VDD supply
1/2 PVDD LCD driving voltage
“1” – Halfduty, “0” – Static
Common Enable. “0” – Enable, “1” – Disable
Test mode. “0” – Normal mode, “1” – Testing Mode
32K internal clock output
Crystal oscillator enable. “0” – Enable, “1” – Disable
32K internal clock enable. “0” – Enable, “1” – Disable
I
1/2 PVDD enable. “0” – Enable, “1” – Disable
I
I
I
I/O
I
I
O
-
Blink control circuit enable “0” – Enable, “1” – Disable
Blink clock input
Crystal oscillator input
To synchronize COMMON signal to the following cascade IC
Master mode 2/4 pin interface, “1” - 2pin , “0” - 4pin
SYNC enable. SYEN is “1” – SYNC output, “0” – SYNC will be high impredence.
When select 4pin interface, it would output timer data.
Dummy Pad, Left it open only
Note : 1. In cascade format of ML2002(ie. ML2002-2U and –3U), one pin is the input of current ML2002
and the other is for the connection with the corresponding input pin of next ML2002.
2. Condition : FIN = 32 KHz Clock.
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Application Note
1. To ensure the good flip-chip assembly quality, we suggest flip-chip bonding house add a “CHECK”
pin for each COG module as shown on the section of “Application Example”. Pin “LOAD” and Pin
“CHECK” shall be connected together if the flip-chip assembly is in good condition. The measured
resistance between Pin “LOAD” and Pin “CHECK” shall not more than 5 kohm.
2. The resistance of ITO glass shall between 15 ohm/□ to 25 ohm/□.
3. Each Common (ie. COM1A and COM1B) shall not cover more than 2,000 mm2 area. In case the
Viewing area of LCD has to be more than 2,000 mm2, IOEN pin has to be connected to outside. At the
time where data is transferring into the IC, internal oscillator has to be disabled through IOEN pin to
prevent abnormal behavior. When data transfer finishes, internal oscillator has to be enabled again.
Suggested programming steps:
1
Disable internal oscillator through IOEN pin
2
Delay (Necessary for fast MCU)
3
Transfer data through DIN, DCLK, LOAD
4
Delay (Necessary for fast MCU)
5
Enable internal oscillator through IOEN pin
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Example :
Note : COM1A and COM1B shall cover half of the Viewing Area (ie. Area = 1,300mm2)
Each Common shall not connect to each other.
Revision History
Version 0.1 – Preliminary
Version 0.2 – Change Alignment mark co-ordinate on page 7
Add application note on page 12
Modify Application Circuit on page 8 – 10.
Updating Feature list on page 1
Updating Functional Description on page 4
Version 0.3 – Change Supply current condition with disable oscillator and internal PVDD opamp
Remove Real time clock in block diagram
Version 0.4 – Add Application Note when glass size area is larger than 2000mm2 for each COM
Version 0.5 – Add Timing diagram for using large LCD panel
Version 0.6 – Add remark on page 8, for FIN connect to GND if OOUT don’t connect with FIN.
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