PCF85134 Datasheet, PDF (1/40 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

PCF85134
Universal LCD driver for low multiplex rates
Rev. 01 — 17 December 2009
Product data sheet
1. General description
The PCF85134 is a peripheral device which interfaces to almost any LCD¹ with low
multiplex rates. It generates the drive signals for any static or multiplexed LCD containing
up to four backplanes and up to 60 segments. In addition, the PCF85134 can be easily
cascaded for larger LCD applications. The PCF85134 is compatible with most
microprocessors or microcontrollers and communicates via a two-line bidirectional
I²C-bus. Communication overheads are minimized using display RAM with
auto-incremented addressing, hardware subaddressing, and display memory switching
(static and duplex drive modes).
2. Features
I Single-chip LCD controller and driver
I Selectable backplane drive configurations: static, 2, 3, or 4 backplane multiplexing
I 60 segment outputs allowing to drive:
N 30 7-segment alphanumeric characters
N 16 14-segment alphanumeric characters
N Any graphics of up to 240 elements
I Cascading supported for larger applications
I 60 × 4-bit display data storage RAM
I Wide 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
I Internal LCD bias generation with voltage follower buffers
I Selectable display bias configurations: static, ¹â„₂, or ¹â„₃
I Wide logic power supply range: from 1.8 V to 5.5 V
I LCD and logic supplies may be separated
I Low power consumption
I 400 kHz I²C-bus interface
I Compatible with any microprocessor or microcontroller
I No external components required
I Display memory bank switching in static and duplex drive mode
I Auto-incremented display data loading
I Versatile blink modes
I Silicon gate CMOS process
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 17.