PT6552

DESCRIPTION The PT6552 is ½ duty dynamic LCD display driver. In addition to being able to directly Drive LCD panels with up to 90 segments, it can also control up to 4 general purpose output ports. This product also includes a key scan circuit that allows it to accept input from keypads with up to 30 keys. This allows the end product front panel wiring to be simplified. APPLICATIONS Cellular phone Data bank, organizer Electronic dictionary/translator P.D.A. P.O.S. Information appliance Caller ID Pager Electronic equipment with LCD display BLOCK DIAGRAM PT6552 ½ Duty LCD Driver with On-Chip Key Input Function FEATURES Up to 4 general purpose output ports Up to 90 segments outputs Up to 30 key inputs (Key scan is only performed when a key is pressed) ½ duty - ½ bias (up to 90 segments) Serial data control sleep mode and the all segments off function Serial data controlled segment output port/general-purpose output port usage Serial data I/O supports CCB format communication with the system controller High generality since display data is displayed directly without decoder intervention Reset pin that can establish the initial state Available in 64 pin QFP and 64 pin LQFP package Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan APPLICATION CIRCUIT PT6552 Note: * Since DO is an open-drain output, a pull-up resistor is required. Select a value (between 1k and 10KΩ) that...