PEDL9040A-03
¡ Semiconductor
¡ Semiconductor
ML9040A-Axx/-Bxx
SEGMENT DRIVER
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PEDL9040A-03
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ML9040A-Axx/-Bxx
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version: Oct. 2000
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Previous version: Sep. 2000
DOT MATRIX LCD CONTROLLER WITH 16-DOT COMMON DRIVER AND 40-DOT
GENERAL DESCRIPTION
The ML9040A-Axx/-Bxx is a dot matrix LCD controller which is fabricated in low power CMOS
silicon gate technology. Character display on the dot matrix character type LCD can be
controlled in combination with a 4-bit or 8-bit microcontroller. This LSI consists of 16-dot
COMMON driver, 40-dot SEGMENT driver, display data RAM, character generator RAM,
character generator ROM and control circuit.
The ML9040A-Axx/-Bxx has the character generator ROM that can be programmed by custom
mask. The ML9040A-A01/-B01 is a standard version having 160 characters with lowercase (5
x 7 dots), and 32 characters with uppercase (5 x 10 dots) in this ROM.
FEATURES
• Easy interface with an 8-bit or 4-bit microcontroller.
• Dot matrix LCD controller/driver for lowercase (5 x 7 dots) or uppercase (5 x 10 dots).
• Automatic power ON reset.
• COMMON signal drivers (16) and SEGMENT signal drivers (40).
• Can control up to 80 characters when used in combination with MSM5259.
• Character generator ROM for 160 characters with lowercase (5 x 7 dots) and 32 characters with
uppercase (5 x 10 dots).
• Character patterns are programmable by character generator RAM. (Lowercase: 5 x 8 dots,
8 patterns, uppercase: 5 x 11 dots, 4 patterns).
• Built-in oscillation circuit to connect with external resistor or ceralock.
• 1/8 duty (1 line; 5 x 7 dots + cursor), 1/11 duty (1 line; 5 x 10 dots + cursor), or 1/16 duty (2
lines; 5 x 7 dots + cursor), selectable.
• Clear display even at 1/5 bias, 3.0V LCD driving voltage.
• LCD driving waveform
ML9040A-Axx: A mode
ML9040A-Bxx: B mode
• Package options:
80-pin plastic QFP(QFP80-P-1420-0.80-BK)(Product name: ML9040A-Axx/-BxxGA)
Al pad chip
(Product name: ML9040A-Axx/-BxxWA)
xx indicates code number.
01 indicates standard code number.
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PEDL9040A-03
¡ Semiconductor
ML9040A-Axx/-Bxx
PIN DESCRIPTIONS
Symbol
R/W
RS
E
DB
0
- DB
7
OSC
1
, OSC
2
COM
1
- COM
16
SEG
1
- SEG
40
DO
CP
L
DF
V
DD
GND
V
1
, V
2
, V
3
, V
4
, V
5
TEST
Read/write selection input pin.
"H" : Read, and "L" : Write
Register selection input pin.
"H" : Data register, and "L" : Instruction register
Input pin for data input/output with CPU and for instruction register activation.
Input/output pins for data send/receive with CPU
Clock oscillating pins required for internal operation upon receipt of the LCD drive signal
and CPU instruction.
LCD COMMON signal output pins.
LCD SEGMENT signal output pins.
Output pin to be connected to MSM5259 to expand the number of characters to be
displayed.
Clock output pin used when DO pin data output shifts inside of MSM5259.
Clock output pin for the serially transferred data to be latched to MSM5259.
The alternating current signal (Display Frequency) output pin.
Power supply pin.
Ground pin.
Bias voltage input pins to drive the LCD.
This is the pin for testing the IC chip.
Leave this pin open during normal use.
*This pin is available only for Al pad chip.
Description
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