ST
Sitronix
1. INTRODUCTION
ST7636
65K Color
Dot Matrix LCD Controller/Driver
The ST7636 is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 396
Segment and 132 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral
Interface (SPI) or
8-bit/16-bit parallel display data and stores in an on-chip display data RAM. 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.
2. FEATURES
Driver Output Circuits
♦
396 segment outputs / 132 common outputs
On-chip Low Power Analog Circuit
♦
On-chip oscillator circuit
♦
Voltage converter (x2, x3, x4, x5, x6, x7, x8)
♦
Voltage regulator
♦
On-chip electronic contrast control function (406 steps)
♦
Voltage follower (LCD bias: 1/5 to 1/12)
Applicable Duty Ratios
♦
Various partial display
♦
Partial window moving & data scrolling
Gray-Scale Display
♦
4FRC & 31 PWM function circuit to display
♦
64 gray-scale display.
Operating Voltage Range
♦
Supply voltage (VDD, VDD1): 2.4 to 3.3V
(VDD2, VDD3, VDD4, VDD5): 2.4 to
3.3V
♦
LCD driving voltage (VOP = V0 - VSS): 3.76 to 18.0 V
♦
the suggested value of V0 is 12~15 V under bias =1/11.
On-chip Display Data RAM
♦
Capacity: 132
·
132
·
16 =278,784bits
♦
65K colors (RGB)=(565) mode
♦
Dithered 262K colors (RGB)=(666) mode
♦
Dithered 16M colors (RGB)=(888) mode
LCD Driving Voltage (EEPROM)
♦
To store contrast adjustment value for better display
Microprocessor Interface
♦
8/16-bit parallel bi-directional interface with 6800-series
or 8080-series
♦
4-line serial interface (4-line-SIF)
♦
3-line serial interface (3-line-SIF)
Package Type
♦
Application for COG
ST7636
6800 , 8080 ,4-Line , 3-Line interface
Ver 1.3
1/99
2006/08/15
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
