suitable for driving medium/small scale dot-matrix
LCD panels, and which is capable of being directly
connected to the bus line of a microcomputer. The
LH155BA stores in the RAM the 8-bit parallel or
serial display data transferred from the
microcomputer and generates LCD drive signals.
Since the LH155BA features a bit-map type LCD
driver that one bit of data in the display RAM
corresponds to one dot in the LCD, there is a lot of
freedom in displaying. The LH155BA has 128
segment outputs and 64 common outputs in a
single chip, making it possible to create an LCD
system with the fewest number of the chips. The
LH155BA enables an LCD system for battery-
operated, hand-carrying information equipment by
securing lower power consumption and wider
operating voltage range.
128-Segment and 64-Common Outputs
LCD Driver IC with A Built-in RAM
鈥?Abundant command functions
鈥?Display data read/write
鈥?Setting up LCD alternating signal cycle
鈥?Setting up display starting-line : per line
鈥?Display ON/OFF
鈥?Display control of normal and reverse modes
鈥?Increment control of display RAM address
鈥?Write control of read modifying
鈥?Internal register read
鈥?Power saving mode
鈥?LCD drive power circuit
鈥?Built-in booster circuit : Two, three or four times
voltage boost is possible
鈥?Built-in voltage converter : Generates LCD
drive voltages (V
0
, V
1
, V
2
, V
3
and V
4
) based
on the boosted voltage
鈥?Built-in power bias ratio : 1/7 or 1/9 bias
(selectable by command)
鈥?Built-in electronic volume : Controllable in 16
steps
鈥?Supply voltages
Logic system : +1.8 to +5.5 V
LCD drive system : +4.0 to +14.0 V
鈥?Operating temperature : 鈥?0 to +85 藲C
鈥?Package : 260-pin TCP (Tape Carrier Package)
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Graphic display output pin : 64 x 128 pins
Segment display output pin : 3 x 12 pins
Icon display output pin : 1 x 1 pin
LCD display by graphic display RAM
鈥?Normal mode : RAM data "0"/not lighted,
RAM data "1"/lighted
鈥?Reverse mode : RAM data "1"/not lighted,
RAM data "0"/lighted
Display RAM memory capacity
鈥?128 x 64 = 8 192 bits (For graphic display)
鈥?12 x 3 = 36 bits (For segment display)
鈥?1 x 1 = 1 bit (For icon display)
General 8-bit MPU interface : Possible to directly
connect 80-family and 68-family MPUs to bus line
Possible to make serial interface
Ratio of display duty cycle :
1/16, 1/32, 1/48 or 1/64 (selectable by command)
128-bit automatic transfer from display RAM to
display data latch
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in
catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
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