ST7571 Datasheet, PDF (1/76 Pages) Sitronix Technology Co., Ltd. – 4 Gray Scale Dot Matrix LCD Controller/Driver

Sitronix
ST7571
4 Gray Scale Dot Matrix LCD Controller/Driver
1. INTRODUCTION
ST7571 is a driver & controller LSI for 4-level gray scale graphic dot-matrix liquid crystal display systems. This chip is
connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI), I²C or 8-bit parallel display data and
stores in an on-chip display data RAM of 128 x 129 x 2 bits. It performs display data RAM write operation with no external
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.
2. FEATURES
4-level (White, Light Gray, Dark Gray, Black) Gray Scale Display with PWM Method
DDRAM Data [ 2n : 2n+1 ]
2n
2n + 1
Gray Scale
0
0
White
0
1
Light gray
1
0
Dark gray
1
1
(Accessible column address, n = 0, 1, 2, ……, 125, 126, 127)
Black
Driver Output Circuits
On-chip Low Power Analog Circuits
- 128 segment outputs / 128+1 common outputs
- On-chip oscillator circuit
Applicable Duty Ratios
- Various partial display
- Build-in Voltage converter ( x8)
- Voltage regulator (temperature gradient: -0.13%/°C)
- Partial window moving & data scrolling
- On-chip contrast control function (64 steps x 8)
On-chip Display Data RAM
- Voltage follower (LCD bias : 1/5 to 1/12)
- Capacity: 128 x 129 x 2= 33,024 bits
Operating Voltage Range
Microprocessor Interface
- Digital Power (VDD1):
- 8-bit parallel interface supports
1.8V~3.3V (cover 1.7V~3.4V)
6800-series or 8080-series MCU
- Analog Power (VDD2, VDD3):
- 4-line serial interface (4-Line SPI)
2.7V~3.3V (cover 2.6V~3.4V)
- 3-line serial interface (3-Line 8-bit SPI)
- I²C serial interface
Package Type
- Application for COG
ST7571
ST7571i
6800 , 8080 ,
4-Line , 3-Line interface
(without I²C interface)
I²C interface
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice.
Ver 1.5a
1/76
2009/7/21