描述 Description

The PCF85176 is a peripheral device which interfaces to almost any Liquid CrystalDisplay (LCD) with low multiplex rates. It generates the drive signals for any static ormultiplexed LCD containing up to four backplanes and up to 40 segments. It can be easilycascaded for larger LCD applications. The PCF85176 is compatible with mostmicrocontrollers and communicates via the two-line bidirectional I2C-bus. Communicationoverheads are minimized by a display RAM with auto-incremented addressing, byhardware subaddressing, and by display memory switching (static and duplex drivemodes).

特性 Features

Single chip LCD controller and driver
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
Selectable display bias configuration: static, 1/2, or 1/3
Internal LCD bias generation with voltage-follower buffers
40 segment drives: Up to 20 7-segment numeric characters
Up to 10 14-segment alphanumeric characters
Any graphics of up to 160 elements
40 × 4-bit RAM for display data storage
Auto-incremented display data loading across device subaddress boundaries
Display memory bank switching in static and duplex drive modes
Versatile blinking modes
Independent supplies possible for LCD and logic voltages
Wide power supply range: from 1.8 V to 5.5 V
Wide logic LCD supply range: From 2.5 V for low-threshold LCDs
Up to 6.5 V for guest-host LCDs and high-threshold twisted nematic LCDs
Low power consumption
400 kHz I2C-bus interface
May be cascaded for large LCD applications (up to 2560 elements possible)
No external components required
Manufactured in silicon gate CMOS process