EM MICROELECTRONIC - MARIN SA
EM6125
Digitally programmable 65 and 81 multiplex rate LCD
Controller and Driver
Features
Typical Applications
ꢀ Slim IC for COG, COF and COB technologies
ꢀ Mobile phones
ꢀ Smart cards
ꢀ I2C & Serial bus interface
ꢀ Internal display data RAM
ꢀ 2 digitally programmable multiplex rates :
ꢀ Automotive displays
ꢀ Portable, battery operated products
ꢀ Balances and scales, utility meters
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81 rows x 102 columns
65 rows x 118 columns
Typical Operating Configuration
ꢀ LCD supply voltage internally generated and digitally
programmable from 3V to 11V
40 row drivers
41 row drivers
ꢀ Low operating current consumption: 120µA (typ)
ꢀ No external components needed except one VLCD
102 columns outputs
capacitor
ꢀ On chip
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4 intermediate bias voltages generation
EM6125
Oscillator for LCD refresh (no external components
required)
VLCD SCL SDA RES Vss1 Vss2 VDD1 VDD2 VHV
ꢀ High noise immunity on inputs
ꢀ Row and column drivers mirroring for COG or COF
Figure 1
connections flexibility
ꢀ Partial display mode with 17 active rows for current
consumption reduction
Pin Configuration
ꢀ Sleep mode for a nearly null current consumption
ꢀ Wide VDD supply voltage from 1.8V to 5V.
ꢀ Wide temperature range: -40°C to +85°C
Description
The EM6125 is a bit map controller and driver for full dot
matrix monochrome STN LCD displays. The driving
capability is 81 rows x 102 columns (10 rows of
characters + one row of icons) or 65 rows x 118 columns
(8 rows of characters + one row of icons). There is a one
to one relation between LCD pixels and bits of the
Display Data RAM.
The EM6125 is extremely low power consumption LCD
controller and driver product. The typical current
consumption is about 120µA with no external component
except the capacitor connected to VLCD. One important
feature on EM6125 is the partial display mode, which
enables important current consumption reduction. With
this function selected, only 17 rows remain active,
needed VLCD decreases and the commutation
frequencies of row and column drivers are also
decreased. These three effects of partial display mode
reduce drastically current consumption.
Figure 2
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Copyright 2001, EM Microelectronic-Marin SA