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LH155BA Datasheet(PDF) 4 Page - Sharp Corporation

Part # LH155BA
Description  128-Segment and 64-Common Outputs LCD Driver IC with A Built-in RAM
PDF  51 Pages
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Manufacturer  SHARP [Sharp Corporation]
Direct Link  http://sharp-world.com/
Logo SHARP - Sharp Corporation

LH155BA Datasheet(HTML) 4 Page - Sharp Corporation

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LH155BA
SYMBOL
1. PIN DESCRIPTION
1.1. Power Supply Pins
I/O
DESCRIPTION
VDD
Power Supply Power supply pin for logic, connected to +1.8 to +5.5 V.
VSS
Power Supply Ground pin, connected to 0 V.
V0
V1
V2
V3
V4
VA
VB
VC
VD
Power Supply
V0-V4 for
Graphic
Display
VA-VD for
Segment
Display
Bias power supply pins for LCD drive voltage.
• When using an external power supply, convert impedance by using resistance-
division of LCD drive power supply or operational amplifier before adding voltage to
the pins.
• When using the external power supply, maintain the following power supply
conditions.
VSS < V4 < V3 < V2 < V1 < V0, VSS ≤ VD < VC < VB < VA
• When the power supply circuit is ON at master operation, LCD drive voltages of V0
to V4 are generated by the internal booster circuit and voltage converter. When
using segment display, input VA, VB, VC and VD level externally.
• When using the internal power supply, be sure to connect each capacitor between
V0 to V4, VA to VD, and VSS.
1.2. LCD Power Supply Circuit Pins
SYMBOL
I/O
DESCRIPTION
CAP+
O
Connecting pin for the internal booster's capacitor + side.
The capacitor is connected between CAP– and CAP+.
CAP–
O
Connecting pin for the internal booster's capacitor – side.
The capacitor is connected between CAP+ and CAP–.
VR1
VR2
I
Used as input pins for graphic display voltage converter.
Voltage must be input between the VEE and VOUT pins by voltage divided by resistors.
VEE3
O
Connecting pin for the internal booster's capacitor + side.
The capacitor is connected between VSS and VEE3.
VEE2
O
Connecting pin for the internal booster's capacitor + side.
The capacitor is connected between VSS and VEE2.
Voltage supply pin for generating boosted voltage in the internal booster circuit.
Usually the same voltage level as VDD.
Power supply
VEE
VOUT
Power supply/
O
Output pin of boosted voltage in the internal booster circuit.
The capacitor must be connected between VSS and VOUT.
Non-connected.
–
SVOUT
Non-connected.
–
SVR
PMODE
Pin for controlling LCD power supply.
A combination of PMODE pin and ON/OFF command of power supply (PON)
enables selection of a specific drive operation.
I



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