ST7549T Datasheet, PDF (1/52 Pages) Sitronix Technology Co., Ltd. – 68 x 102 Dot Matrix LCD Controller/Driver

ST
Sitronix
ST7549T
68 x 102 Dot Matrix LCD Controller/Driver
1. INTRODUCTION
The ST7549T is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 102 segment
and 67 common with 1 ICON driver circuits. This chip is connected directly to a microprocessor, accepts 3-line or 4-line
serial peripheral interface (SPI), I2C interface or 8-bit parallel interface, display data can stores in an on-chip display data
RAM of 68 x 102 bits. It performs display data RAM read/write operation with no external operating clock to minimize
power consumption. In addition, because it contains power supply circuits to drive liquid crystal, it is possible to make a
display system with the fewest components.
2. FEATURES
Single-chip LCD controller & driver
Driver Output Circuits
102 segment / 67 common+1 ICON common (1/68 duty)
102 segment / 32 common+1 ICON common (1/33 duty)
102 segment / 16 common+1 ICON common (1/17 duty)
(1/33 duty and 1/17 duty are under partial screen mode)
On-chip Display Data Ram
n Capacity: 68X102=6,936 bits
Microprocessor Interface
n 8-bit parallel bi-directional interface with
6800-series or 8080-series
n 4-line SPI (serial peripheral interface) available
(only write operation)
n 3-line SPI (serial peripheral interface) available
n I²C (Inter-Integrated Circuit) Interface
On-chip Low Power Analog Circuit
n Generation of LCD supply voltage (externally VOUT
voltage supply is possible)
n Generation of intermediate LCD bias voltages
n Oscillator without external components
(external clock also possible)
n Voltage Booster (X2,X3,X4,X5)
n Voltage Regulator
(temperature gradient -0.11%/°C)
n Voltage Follower
n On-chip electronic contrast control function (255
steps)
External RESB (reset) pin
Supply voltage range
n VDD1 -VSS : 1.7 to 3.3V
n VDD2 -VSS : 2.4 to 3.3V
n VOUT -VSS : 13.5V (Max.)
Temperature range: -30 to +85 degree
Package Type: COG
ST7549T-G2
ST7549Ti-G2
6800, 8080,
4-Line, 3-Line interface
(without I²C interface)
I²C interface
Ver 1.3
1/52
2005/12/06