UPD16431A Datasheet, PDF (1/34 Pages) NEC – 1/2, 1/3, 1/4-DUTY LCD CONTROLLER/DRIVER

DATA SHEET
MOS INTEGRATED CIRCUIT
µPD16431A
1/2, 1/3, 1/4-DUTY LCD CONTROLLER/DRIVER
The µPD16431A is an LCD controller/driver that enables display of segment type LCDs of 1/2, 1/3, or 1/4 duty
cycle. This controller/driver has 56 segment output lines of which eight can also be used as LED output lines.
Because the LCD driver contained in the µPD16431A has separate logic and power supply, up to 6.5 V of LCD
drive voltage can be set. In addition, key source output lines for key scanning and key input data lines are
also provided, so that the µPD16431A is ideal for applications in the front panel of an automobile stereo system.
FEATURES
• Various display modes
1/2 duty: 112 segment outputs or 96 segment outputs + 8 LED outputs
1/3 duty: 168 segment outputs or 144 segment outputs + 8 LED outputs
1/4 duty: 224 segment outputs or 192 segment outputs + 8 LED outputs
• Key scan circuit (key source outputs are shared with LCD driver outputs)
• Independent LCD driver power supply VLCD (can be set to VDD to 6.5 V)
• Serial data input/output (SCK, STB, DATA)
• On-chip oscillator incorporated
• Power-ON reset circuit
ORDERING INFORMATION
Part Number
µPD16431AGC-7ET
Package
80-pin plastic QFP (0.65 pitch, 14 × 14)
Document No. IC-3414
(O.D. No. IC-8885)
Date Published January 1995 P
Printed in Japan
©
1995