低复用率的通用LCD驱动器 Universal LCD driver for low multiplex rates
General description
The PCF85176 is a peripheral device which interfaces to almost any Liquid Crystal Display LCD1 with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 40 segments. It can be easily cascaded for larger LCD applications.
Features and benefits
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 generationwith voltage-follower buffers
40 segment drives:
Up to twenty 7-segment alphanumeric characters
Up to ten 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 instatic 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 insilicon gate CMOS process