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1 General description

The PCA85162 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD)1 with low

multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes

and up to 32 segments. It can be easily cascaded for larger LCD applications. The PCA85162 is compatible

with most microcontrollers and communicates via the two-line bidirectional I2C-bus. Communication overheads

are minimized by a display RAM with auto-incremented addressing, by hardware subaddressing, and by display

memory switching (static and duplex drive modes).

2 Features and benefits

? AEC-Q100 compliant for automotive applications

? 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 segments/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 8.0 V for guest-host LCDs and high-threshold twisted nematic LCDs

? Low power consumption

? Extended temperature range up to 95 °C

? 400 kHz I2C-bus interface

? No external components required

? Manufactured in silicon gate CMOS process