描述 Description

PCF8551 is an ultra low-power LCD segment driver with 4 backplane- and 36segment-driver outputs, with either an I2C- (PCF8551A) or an SPI-bus (PCF8551B)interface. It comprises an internal oscillator, bias generation, instruction decoding, anddisplay controller.

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 buffers
? 36 segment drives:
? Up to 18 7-segment numeric characters
? Up to 9 14-segment alphanumeric characters
? Any graphics of up to 144 segments/elements
? Auto-incrementing display data and instruction loading
? Versatile blinking modes
? Independent supplies of VLCD and VDD
? Power supply ranges:
? 1.8 V to 5.5 V for VLCD
? 1.8 V to 5.5 V for VDD
? Ultra low-power consumption
? 400 kHz I2C-bus interface (PCF8551A)
? 3 MHz SPI-bus interface (PCF8551B)
? Internally generated or externally supplied clock signal

應(yīng)用 Application

Metering equipment
Consumer healthcare devices
Battery operated devices
Measuring equipment