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V6118852F Schematic ( PDF Datasheet ) - ETC

Teilenummer V6118852F
Beschreibung 2/ 4 and 8 Multiplex LCD Driver
Hersteller ETC
Logo ETC Logo 




Gesamt 14 Seiten
V6118852F Datasheet, Funktion
EM MICROELECTRONIC-MARIN SA
V6118
2, 4 and 8 Multiplex LCD Driver
Features
nV 6118 2 is 2 way multiplex with 2 rows and 38 columns
nV 6118 4 is 4 way multiplex with 4 rows and 36 columns
nV 6118 8 is 8 way multiplex with 8 rows and 32 columns
nLow dynamic current, 150 µA max.
nLow standby current, 1 µA max. at 25 oC
nVoltage bias and mux signal generation on chip
nDisplay refresh on chip, 40 x 8 RAM for display storage
nDisplay RAM addressable as 8, 40 bit words
nColumn driver only mode to have 40 column outputs
nCrossfree cascadable for large LCD applications
nSeparate logic and LCD supply voltage pins
nWide power supply range, VDD: 2 to 6 V, VLCD: 2 to 8 V
nBLANK function for LCD blanking on power up etc.
nVoltage bias inputs for applications with large pixel sizes
nBit mapped
nSerial input / output
nVery low external component count
n-40 oC to +85 oC temperature range
nNo busy states
nLCD updating synchronized to the LCD refresh signal
n QFP52 and TAB packages
Description
The V 6118 is a universal low multiplex LCD driver. The Ver-
sion V 6118 2 drives two ways multiplex (two blackplanes)
LCD, the version V 6118 4, four way multiplex LCD, and the
V 6118 8, eight way multiplex LCD. The display refresh is
handled on chip via a 40 x 8 bit RAM which holds the LCD
content driven by the driver. LCD pixels (or segments) are
addressed on a one to one basis with the 40 x 8 bit RAM ( a
set bit corresponds to an activated LCD pixel). The V 6118
has very low dynamic current consumption, 150 µA max.,
making it particularly attractive for portable and battery
powered applications. The wide operating range on both
the logic (VDD) and the LCD (VLCD) supply voltages offers
much application flexibility. The LCD bias generation is
internal. The voltage bias levels can also be provided extern-
nally for applications having large pixels sizes. The V 6118
can be used as a column only driver for cascading in large
display applications. In the column only mode, 40 column
Outputs available to address the display. A BLANK func-
tion is provided to blank the LCD, useful at power up to hold
the display blank until the microprocessor has updated the
display RAM.
Applications
nBalances and scales
nAutomotive displays
nUtility meters
nLarge displays (public information panels etc.)
nPagers
nPortable, battery operated products
nTelephones
Typical Operating Configuration
V6118 8
QFP52
V6118
1






V6118852F Datasheet, Funktion
Name
S1...S40
V3
V2
V1
VLCD
FR
DI
DO
CLK
STR
COL
VSS
Function
LCD outputs, see table 7
LCD voltage bias level 31)2)
LCD voltage bias level 21)
LCD voltage bias level 11)
Power supply for the LCD
AC input signal for LCD driver outputs
Serial data input
Serial data output
Data clock input
Data strobe, blank, synchronize input
Power supply for logic
Column only driver mode
Supply GND
1) The V6118 has internal voltage bias level generation.When
driving large pixels, an external resistor divider chain can be
connected to the voltage bias level inputs to obtain
enhanced display contrast (see Fig. 12, 13 and 14). The
external resistor divider ratio should be in accordance with
the internalresistor ratio (see table 8).
2) V3 is connected internally on the V6118 4.
LCD Voltage Bias Levels
V6118 2/4/8
VOP (*)
VOFF (rms)
VON (rms)
VOFF
1+
=
1+
=
6

6 Page









V6118852F pdf, datenblatt
V6118 2/4/8
V6118 8
By connecting the V1, V2 and V3 bias inputs as shown, the pixel load is averaged across all the drivers. The
sffective bias level source impedance is the parallel combination of the total number of drivers. For example,
if two V 6118 are cascaded as above, then the maximum bias level impedance becomes 12. 5 k .
1)When themicroprocessor is reset, the port pin will be
configured as an input and so the STR line would
float. The pullup resistor will ensure that the LCD is
blank while the system reset line is active and after
until the port pin is setup by software.
12

12 Page





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