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LH155BA Datasheet(PDF) 25 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) 25 Page - Sharp Corporation

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LH155BA
2.23. Initialization
The LH155BA is initialized by setting RESB pin to "L".
Normally, RESB pin is initialized together with MPU
by connecting to the reset pin of MPU.
When power is ON, be sure to reset operation.
3. PRECAUTIONS
Precautions when connecting or disconnecting
the power supply
This IC may be permanently damaged by a high
current which may flow if voltage is supplied to the
LCD drive power supply while the logic system
power supply is floating. The details are as follows.
q When using an external power supply
ø When connecting the power supply
After connecting the logic system power supply,
make reset operation and then apply external
LCD drive voltages to corresponding pins. (V0,
V1, V2, V3, V4 or VOUT, VR1 and VR2)
ø When disconnecting the power supply
After executing HALT command, disconnect
external LCD drive voltages and then disconnect
the logic system power supply.
w When using the internal power supply
ø When connecting the power supply
After connecting the logic system power supply,
make reset operation and then execute PON
command.
ø When disconnecting the power supply
After executing HALT command, disconnect the
logic system power supply.
It is advisable to connect the serial resistor (50 to
100 $) or fuse to the LCD drive power VOUT or V0
of the system as a current limiter. Set up a suitable
value of the resistor in consideration of the display
grade.
PARAMETER
INITIAL STATE
Display RAM
Not fixed
X-address
00H set
Y-address
00H set
Display starting line
Set at the first line (0H)
Display ON/OFF
Display OFF
Display normal/reverse
Normal
Display duty
1/64
n-line alternating
Every frame unit
Common shift direction
COM0/COM63
Increment mode
Increment OFF
REF mode
Normal
Data SWAP mode
OFF
Register in electronic volume
(1, 1, 1, 1)
Power supply
OFF



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