描述 Description

1. INTRODUCTION
The ST7637 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 outputsApplicable Duty Ratios
? Various partial display
? Partial window moving & data scrollingGray-Scale Display
? 4FRC & 31 PWM function circuit to display 64 gray-scale display
? Support 8 color mode (Idle mode)On-chip Display Data RAM
? Capacity: 132 x 132 x 16 =278,784 bitsColor support by Interface
? 256 colors (RGB)=(332) mode
? 4k colors (RGB)=(444) mode
? 65K colors (RGB)=(565) mode
? Truncated 262K colors (RGB)=(666) mode
? Truncated 16M colors (RGB)=(888) modeMicroprocessor Interface
? 8/16-bit parallel bi-directional interface with 6800-series or 8080-series
? 4-line serial interface
? 3-line (9-bits) serial interfaceOn-chip Low Power Analog Circuit
? On-chip oscillator circuit
? Voltage converter (x2~x8) with internal capacitors.
? Extremely Few Outsider Components. (3 Capacitors)
? On-chip Voltage Regulator
? On-chip electronic contrast control function
? Voltage follower (LCD bias: 1/5~1/12) Operating Voltage Range
? Supply Digital Voltage (VDD, VDD1): 1.65 to 3.0V
? Supply Analog Voltage (VDD2~VDD5): 2.4 to 3.3V
? LCD driving voltage (VOP = V0 - VSS): Max: 18V LCD Driving Voltage (OTP)
? Contrast Adjustment Value is stored in the Built-In OTP-ROM for better display quality. LCD Driving setting suggestion
? VOP = 14V, BIAS=1/9. (VDD=2.8V)
? VOP=15.5V,BIAS=1/10. (VDD=2.8V)Package Type
? Application for COG

特性 Features

Driver Output Circuits
? 396 segment outputs / 132 common outputsApplicable Duty Ratios
? Various partial display
? Partial window moving & data scrollingGray-Scale Display
? 4FRC & 31 PWM function circuit to display 64 gray-scale display
? Support 8 color mode (Idle mode)On-chip Display Data RAM
? Capacity: 132 x 132 x 16 =278,784 bitsColor support by Interface
? 256 colors (RGB)=(332) mode
? 4k colors (RGB)=(444) mode
? 65K colors (RGB)=(565) mode
? Truncated 262K colors (RGB)=(666) mode
? Truncated 16M colors (RGB)=(888) modeMicroprocessor Interface
? 8/16-bit parallel bi-directional interface with 6800-series or 8080-series
? 4-line serial interface
? 3-line (9-bits) serial interfaceOn-chip Low Power Analog Circuit
? On-chip oscillator circuit
? Voltage converter (x2~x8) with internal capacitors.
? Extremely Few Outsider Components. (3 Capacitors)
? On-chip Voltage Regulator
? On-chip electronic contrast control function
? Voltage follower (LCD bias: 1/5~1/12) Operating Voltage Range
? Supply Digital Voltage (VDD, VDD1): 1.65 to 3.0V
? Supply Analog Voltage (VDD2~VDD5): 2.4 to 3.3V
? LCD driving voltage (VOP = V0 - VSS): Max: 18V LCD Driving Voltage (OTP)
? Contrast Adjustment Value is stored in the Built-In OTP-ROM for better display quality. LCD Driving setting suggestion
? VOP = 14V, BIAS=1/9. (VDD=2.8V)
? VOP=15.5V,BIAS=1/10. (VDD=2.8V)Package Type
? Application for COG?