The PCF85162 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 32 segments. It can be easilycascaded for larger LCD applications. The PCF85162 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).
Feature
- 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
- 32 segment drives:
- Up to 16 7-segment numeric characters
- Up to 8 14-segment alphanumeric characters
- Any graphics of up to 128 elements
- 32 × 4-bit RAM for display data storage
- 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
- No external components required
- Manufactured in silicon gate CMOS process
