HT0313A Tomato LSI, Inc., HT0313A Datasheet - Page 5

• Manufacturer Part Number: HT0313A
• Description: 65COM/132SEG DRIVER & CONTROLLER FOR STN LCD
• Manufacturer: Tomato LSI, Inc.

HT0313A
TOMATO LSI Inc.
1. INTRODUCTION
2. FEATURES
The HT0313A is a driver and controller LSI for graphic dot-matrix liquid crystal display systems. It contains
65 common and 132 segment driver circuits. This chip is connected directly to a microprocessor (MPU),
accepts serial or 8-bit parallel display data and stores in an on-chip Display Data RAM (DDRAM) of 65 x
132 bits. It provides a high-flexible display section due to one to one correspondences between on-chip
DDRAM bits and LCD panel pixels. And it performs DDRAM read / write operation with no externally
operating clock to minimize power consumption. In addition, because it contains power supply circuits
necessary to drive liquid crystal, it is possible to make a display system with the fewest components.
On-chip display data RAM (DDRAM)
Multi-chip operation
Applicable duty-ratios
Microprocessor (MPU) interface
Built-in analog circuits
Driver output circuits
Various Function set
-. 65 common outputs / 132 segment outputs
-. Capacity: 65 x 132=8,580 bits
-. Master and slave mode available
-. 8-bit parallel bi-directional interface with 6800-series or 8080-series
-. Serial interface (write operation only)
-. Display ON/OFF, set initial display line, set page address, set column address, read status, write /
-. H/W and S/W reset available
-. Static drive circuit equipped internally for indicators with 4 flashing modes
-. On-chip Oscillator circuit for display clock(external clock can also be used)
-. High performance voltage converter
-. High accuracy voltage regulator(Temperature coefficient: -0.05% /
-. Electronic contrast control function (64 steps)
-. Vref = 2.0V
-. High performance voltage follower
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.
(V1 to V4 voltage divider resistors and OP-Amp for increasing drive capacity)
(with booster ratios of x2, x3, x4 and x5, where the step-up reference voltage can be used
externally)
Duty ratio
65COM / 132SEG DRIVER & CONTROLLER FOR STN LCD
1/65
1/49
1/33
3% (V0 voltage adjustment voltage)
5
Applicable LCD bias
1/7 or 1/9
1/6 or 1/8
1/5 or 1/6
Maximum display area
o
C, -0.2% /
65 x 132
49 x 132
33 x 132
Ver 0.0
o
C mask option)