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ST7541 Datenblatt(PDF) 1 Page - Sitronix Technology Co., Ltd.

Teilenummer ST7541
Bauteilbeschribung  4 Gray Scale Dot Matrix LCD Controller/Driver
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Hersteller  SITRONIX [Sitronix Technology Co., Ltd.]
Direct Link  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7541 Datenblatt(HTML) 1 Page - Sitronix Technology Co., Ltd.

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ST
Sitronix
ST7541
4 Gray Scale Dot Matrix LCD Controller/Driver
Ver 1.9
1/78
2007/9/3
INTRODUCTION
ST7541 is a driver & controller LSI for 4-level gray scale graphic dot-matrix liquid crystal display systems. This chip can
connect directly to a microprocessor which supports: Serial Peripheral Interface (SPI), IIC or 8-bit parallel interface. Display
data stores in an on-chip display data RAM of 128 x 129 x 2 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 necessary to
drive liquid crystal, it is possible to make a display system with the fewest components.
FEATURES
4-level Gray Scale
– Display with PWM and FRC Methods
DDRAM Data [2n:2n+1]
2n
2n + 1
Gray Scale
0
0
White
0
1
Light gray
1
0
Dark gray
1
1
Black
(Accessible column address, n = 0~127)
Driver Output Circuits
128 segment outputs / 128+1 common outputs
Applicable Duty Ratios
– Various partial display
– Partial window moving & data scrolling
On-chip Display Data RAM
– Capacity: 128 × 129 × 2= 33,024 bits
Microprocessor Interface
– 8-bit bi-directional parallel interface supports 6800-series
or 8080-series MPU
– 4-line serial interface (4-Line SPI)
– 3-line serial interface (3-Line 8-bit SPI)
– IIC serial interface
On-chip Low Power Analog Circuit
– On-chip oscillator circuit
– Voltage booster (x3, x4, x5 or x6)
– Voltage regulator (temperature coefficient: -0.144%/˚C, or
external input)
– On-chip electronic contrast control function (64 steps X 8)
– Voltage follower (LCD bias : 1/5 to 1/12)
Operating Voltage Range
– Supply voltage (VDD): 1.8 to 3.3V
– Supply voltage (VDD2): 2.4 to 3.3V
– LCD driving voltage (VLCD = V0 - VSS): 3.5 to 15.0 V
Package Type
– Application for COG
ST7541
6800 , 8080 ,
4-Line , 3-Line interface
(without IIC interface)
ST7541i
IIC interface
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice.


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