
S6B1400X SPEC. VER. 0.0 104 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
1
INTRODUCTION
The S6B1400X 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 104 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 104
segment driver circuits, so that a single chip can drive a 65 x 104 dot display. This chip is able to minimize power
consumption because it performs display data RAM read/write operation wth 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
65 common outputs and 104 segment outputs
Applicable Duty Ratios
Capacity: 65 x 104 = 6,760 bits
RAM bit data “ 1” : a dot of display is illuminated
RAM bit data “ 0” : a dot of display is not illuminated
Duty ratio
Applicable LCD bias
Maximum display area
65
×
104
55
×
104
49
×
104
33
×
104
1/65
1/7 or 1/9
1/55
1/6 or 1/8
1/49
1/6 or 1/8
1/33
1/5 or 1/6
Microprocessor Interface
Various Function Set
High-speed 8-bit parallel bi-directional interface with 6800-series or 8080-series
SPI (Serial Peripheral Interface) available. (only write operation)
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 V
LCD
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 mode