產(chǎn)品詳情

PT16557 普誠LCD顯示驅(qū)動器 帶按鍵輸入功能

DESCRIPTIONP

The PT16557 is 1/3 duty and 1/4 duty LCD displaydrivers that can directly drive up to 164 segments andcan control up to four general-purpose output ports.These products also incorporate a key scan circuitthat accepts input from up to 30 keys to reduce printedcircuit board wiring.

FEATURES

● Key input function for up to 30 keys (A key scanis performed only when a key is pressed.)

● 1/3 duty and 1/4 duty drive schemes can becontrolled from serial data

● 1/2 bias and 1/3 bias drive schemes can becontrolled from serial data

● Capable of driving up to 126 segments using 1/3duty and up to 164 segments using 1/4 duty.

● Sleep mode and all segments off functions thatare controlled from serial data

● Switching between key scan output and segmentoutput can be controlled from the serial data

● The key scan operation enabled/disabled statecan be controlled from the serial data

● Switching between segment output port andgeneral-purpose output port can be controlled fromserial data

● The common and segment output waveform framefrequency can be controlled from the serial data

● Switching between RC oscillator mode andexternal clock mode can be controlled from theserial data

● Serial data I/O supports CCB formatcommunication with the system controller

● Direct display of display data without the use of adecoder provides high generality

● Independent VLCD for the LCD driver block.(When the logic block supply voltage VDD is in therange 3.6 to 6.0V, VLCD can be set to a voltage inthe range 0.75 x VDD to 6.0V, and when VDD is inthe range 2.7 to 3.6V, VLCD can be set to a voltagein the range 2.7 to 6.0V.) 

● Provision of an on-chip voltage-detection type resetcircuit prevents incorrect displays

● AEC-Q100 Grade2 Compliant for AutomotiveApplications

APPLICATIONS

● Frequency Display for Electronic Tuners