R
EM MICROELECTRONIC -
MARIN SA
EM6124
Digitally Programmable 8 to 25 Multiplex
LCD Controller & Driver
Description
The EM6124 is a low power CMOS LCD controller and
driver. The 8, 16, 20 and 24 way multiplex are digitally
programmable by the command byte. One additional line
can be added for Icons or Inverted Video by programming
9, 17, 21 or 25 way multiplex. The display refresh is
handled on chip by an internal RC oscillator via one
selectable 25 x 116 RAM which holds the LCD content
driven by the driver. LCD pixels (or segments) are
addressed on a one to one basis with the 25 x 116 bit
RAM (a set bit corresponds to an activated LCD pixel).
The EM6124 has very low dynamic current consumption,
typically 70 µA at V
DD
= 2 V, V
LCD
= 7 V making it
particularly attractive for portable and battery powered
products. The wide operating range on supply voltages
and temperature offers much application flexibility. The
LCD voltage, bias generation and frame frequency are
generated on chip. The clock signal can be used to shift
and to latch the data into the RAM.
Applications
•
Mobile phones (GSM, DECT)
•
Smart cards
•
Automotive displays
•
Portable, battery operated products
•
Balances and scales, utility meters
Features
•
Slim IC for chip-on-board, with gold bumps for Chip-On-
Glass and Chip-On-Flex technologies
•
Very simple 2-wire interface
•
Digitally programmable multiplex rates:
8 x 113, 9 x 112, 16 x 105, 17 x 104, 20 x 101, 21 x 100,
24 x 97, 25 x 96
•
No lost pads while row driver from 8 up to 25
•
On chip: Voltage multiplier, V
LCD
up to 7 V (3 to 6 V at
25 °C), 64 V
LCD
digitally programming steps, 4 V
LCD
temperature compensation factors, bias generation, V
ON
/ V
OFF
generation, frame frequency, display refresh RAM
•
No busy state
•
High noise immunity in inputs
•
No external components needed, except a V
LCD
capacitor
•
Digitally reversing row data
•
Digitally reversing column data
•
Inverting data function
•
Blank function
•
Set function
•
Checker and Inverted Checker functions
•
Sleep modes
•
Low LCD operating current consumption
•
Wide V
DD
voltage supply range, 2 to 5 V
•
Wide temperature range: -40 to + 85 °C
•
Direct display of RAM data through the display data
RAM
(To cascade ICs, please see Fig. 19 and contact EM
Microelectronic-Marin S.A.)
Typical Operating Configuration
Pad Assignment
Slim Form Chip
Fig. 1
(To
contact
Power
Supplies, please see
Fig. 20)
Fig. 2
Copyright
©
2004, EM Microelectronic-Marin SA
1
www.emmicroelectronic.com
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
