S6B0728 Datasheet, PDF (9/60 Pages) Samsung semiconductor – 132 SEG / 128 COM DRIVER & CONTROLLER FOR STN LCD

132 SEG / 128 COM DRIVER & CONTROLLER FOR STN LCD
PRELIMINARY SPEC. VER. 0.1 S6B0728
PIN DESCRIPTION
Name
VDD
Vss
V0
V1
V2
V3
V4
Table 3. Power Supply Pins
I/O
Description
Supply Power supply
Supply Ground
LCD drivers supply voltages
The voltage determined by LCD pixel is impedance-converted by an operational amplifier
for application.
Voltages should have the following relationship: V0 ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ Vss
When the internal power circuit is active, these voltages are generated as following table
I/O _{according to the state of LCD bias.}
LCD bias
V1
V2
V3
V4
1/N bias
(N-1)/N x V0
(N-2)/N x V0
2/N x V0
1/N x V0
NOTE : *N = 5 to 12
Table 4. LCD Driver Supply Pins
Name
I/O
Description
C1-, C2- I/O Capacitor negative connection pins used for voltage converter
C1+, C2+
C3+, C4+ I/O Capacitor positive connection pins used for voltage converter
C5+, C6+
VOUT
I/O
Voltage converter input/output pin.
VOUT = Boost level × VCI, for internal booster
VCI
I Voltage converter input voltage pin for internal booster.
VR
I V0 voltage adjustment pin used to adjust V0 by means of external resistors(INTRS = “L”)
REF
Selects the external VREF voltage via VEXT pin
I − REF = "L": using the external VREF
− REF = "H": using the internal VREF
VEXT
I
Externally-input reference voltage(VREF) for the internal voltage regulator.
It is valid only when REF is “L”.
INTRS
Internal resistors select pin used to select resistors for adjusting V0 voltage level.
I
− INTRS = "H”: use the internal resistors.
− INTRS = "L”: use the external resistors. VR pin and external resistive divider control V0
voltage.
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