s6b0724 Densitron Corporation, s6b0724 Datasheet - Page 5

• Manufacturer Part Number: s6b0724
• Description: 132 Seg / 65 Com Driver & Controller For Stn Lcd
• Manufacturer: Densitron Corporation

S6B0724
INTRODUCTION
The S6B0724 is a single chip driver & controller LSI for graphic dot-matrix liquid crystal display systems. This chip
can be connected directly to a microprocessor, accepts serial or 8-bit parallel display data from the microprocessor,
stores the display data in an on-chip display data RAM of 65 x 132 bits and generates a liquid crystal display drive
signal independent of the microprocessor. It provides a high-flexible display section due to 1-to-1 correspondence
between on-chip display data RAM bits and LCD panel pixels. It contains 65 common driver circuits and 132
segment driver circuits, so that a single chip can drive a 65 x 132 dot display. And the capacity of the display can be
increased through the use of master/slave multi-chip structures.
These chip are able to minimize power consumption because it performs display data RAM read / write operation
with no external operation clock. In addition, because it contains power supply circuits necessary to drive liquid
crystal, which is a display clock oscillator circuit, high performance voltage converter circuit, high-accuracy voltage
regulator circuit, low power consumption voltage divider resistors and OP-Amp for liquid crystal driver power voltage,
it is possible to make the lowest power consumption display system with the fewest components for high
performance portable systems.
FEATURES
Display Driver Output Circuits
On-chip Display Data RAM
Applicable Duty Ratios
Microprocessor Interface
Various Function Set
65 common outputs / 132 segment outputs
Capacity: 65 x 132 = 8,580 bits
RAM bit data “1”: a dot of display is illuminated.
RAM bit data “0”: a dot of display is not illuminated.
High-speed 8-bit parallel bi-directional interface with 6800-series or 8080-series
Serial interface (only write operation) available
Display ON / OFF, set initial display line, set page address, set column address, read status, write / read display
data, select segment driver output, reverse display ON / OFF, entire display ON / OFF, select LCD bias,
set/reset modify-read, select common driver output, control display power circuit, select internal regulator
resistor ratio for V0 voltage regulation, electronic volume, set static indicator state.
H/W and S/W reset available
Static drive circuit equipped internally for indicators with 4 flashing modes
PRELIMINARY SPEC. VER. 1.1
Duty ratio
1/65
1/55
1/49
1/33
Applicable LCD bias
1/7 or 1/9
1/6 or 1/8
1/6 or 1/8
1/5 or 1/6
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
Maximum display area
65
55
49
33
132
132
132
132
1