ST
Sitronix
1. INTRODUCTION
2
ST7558
65 x 102 Dot Matrix LCD Controller/Driver
The ST7558 is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 102 segment
and 65 common with 1 ICOM driver circuits. This chip is connected directly to a microprocessor, accepts 4-line serial
interface (SPI), I C interface or 8-bit parallel interface, display data can stores in an on-chip display data RAM of 66 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
Driver Output Circuits
102 segment outputs / 65 common outputs
On-chip Display Data Ram
-
Capacity: 66X102=6732 bits
-
-
-
Oscillator requires no external components
(external clock also possible)
Voltage converter (x2, x3, x4, x5)
Voltage regulator (temperature gradient
-0.05%/
°C
)
-
-
Voltage follower
On-chip electronic contrast control function (128
stepsX2)
-
Liquid crystal driving voltage :
V0 -VSS = max 12 V (external power supply)
External RESB (reset) pin
Logic supply voltage range V
DD
-V
SS
-
1.8 to 3.3V
Microprocessor Interface
-
8-bit parallel bi-directional interface with
6800-series or 8080-series
-
4-line SPI (serial peripheral interface) available
(only write operation)
-
I C (Inter-Integrated Circuit) Interface
2
On-chip Low Power Analog Circuit
-
Generation of LCD supply voltage (externally
Vout voltage supply is possible)
-
Generation of intermediate LCD bias voltages
Temperature range: -30 to +85 degree
ST7558
6800 , 8080 , 4-Line
(without I
2
C interface)
I
2
C interface
ST7558i
Ver 2.3
1/56
2005/10/05
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
