LH1594 Datasheet, PDF (1/48 Pages) Sharp Electrionic Components – 80-Segment and 17-Common Outputs LCD Driver IC with A Built-in CGROM

LH1594/LH1595
LH1594/LH1595 80-Segment and 17-Common Outputs
LCD Driver IC with A Built-in CGROM
DESCRIPTION
The LH1594/LH1595 are LCD drivers with a built-in
character ROM suitable for driving small scale dot-
matrix LCD panels, and which are capable of being
directly connected to the bus line of a
microcomputer. The 8-bit parallel or serial data
transferred from a microcomputer is used to
generate LCD drive signals for displaying characters.
Incorporating a character ROM which has font
characters configured in the format of 5 x 8 dots and
a character RAM which allows the user to define
characters, the LH1594/LH1595 provide a higher
freedom of display. Since the LH1594/LH1595 have
80 output pins for a segment drive circuit and 17
output pins for a common drive circuit in a single
chip, a display system for 16 characters x 2 lines
can be implemented easily. The LH1594/LH1595
enable an LCD system for battery-operated, hand-
carrying information equipment by securing lower
power consumption and wider operating voltage
range.
FEATURES
• Built-in CGROM : 240 characters
(5 x 8 x 240 = 9 600 bits)
• Built-in CGRAM : 8 characters
(5 x 8 x 8 = 320 bits)
• Built-in SEGRAM : 80 segments
(16 x 7 = 112 bits)
• Built-in display data RAM : 32 characters
(32 x 8 = 256 bits)
• Format of font character : 5 x 8 dots including 1
dot which also serves to display a cursor
• General 8-bit MPU interface : Possible to directly
connect 80-family or 68-family MPU to bus line
• Possible to make serial interface
(I²C BUS^* format is for LH1594)
• Ratio of display duty cycle :
1/8, 1/9, 1/16 or 1/17 (selectable by command)
• Abundant command functions
– Display of 2 lines by 16 characters
– Display ON/OFF
– Normal/reverse display control
– Busy flag readout
– Cursor display
– Blinking : per character
– Display double fonts lengthwise
– Power saving mode
• LCD drive power circuit
– Built-in booster circuit : Two or three times
voltage boost is possible
– Built-in voltage converter : Generates LCD
drive voltages (V0, V1, V2, V3 and V4) based
on the boosted voltage
– Built-in power bias ratio :
1/4 or 1/5 bias (selectable by command)
– Built-in electronic volume : Controllable in 16
steps
– Supply voltages
Logic system : +2.2 to +5.5 V
LCD drive system : +4.0 to +11.0 V
• Operating temperature : –30 to +85 ˚C
• Package : 151-pin TCP (Tape Carrier Package)
* Purchase of I²C components of Sharp Corporation, or one
of its sublicensed Associated Companies conveys a
license under the Philips I²C Patent Rights to use these
components in an I²C system, provided that the system
conforms to the I²C Standard Specification as defined by
Philips.
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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