Datasheet NEC µPD7225GB-3B7 — Ficha de datos

DATA SHEET MOS INTEGRATED CIRCUIT ВµPD7225 PROGRAMMABLE LCD CONTROLLER/DRIVER
The ВµPD7225 is a software-programmable LCD (Liquid Crystal Display) controller/driver. The ВµPD7225 can be
serially interfaced with the CPU in a microcomputer and can directly drive 2, 3, or 4-time division LCD. The ВµPD7225
contains a segment decoder which can generate specific segment patterns. In addition, the ВµPD7225 can be used to
control on/off (blinking) operation of a display. FEATURES Can directly drive LCD Programmable time-division multiplexing Static drive Divide-by-2, 3, or -4 time division multiplexing Number of digits displayed 7-segment
Divide-by-4 time division. 16 digits Divide-by-3 time division. 10 2/3 digits Divide-by-2 time division. 8 digits Static . 4 digits 14-segment
Divide-by-4 time division. 8 digits Bias method
Static, 1/2, 1/3 Segment decoder output 7-segment : Numeric characters 0 to 9, six symbols 14-segment : 36 alphanumeric characters, 13 symbols Blinking operation Multi-chip configuration possible 8-bit serials interface
75X series and 78K series compatible CMOS Single power supply ORDERING INFORMATION
Part Number Package Quality level ВµPD7225G00 52-pin plastic QFP (bend) Standard (for general electrics application) ВµPD7225G01 52-pin plastic QFP (straight) Standard (for general electrics application) ВµPD7225GB-3B7 56-pin plastic QFP (bend) Standard (for general electrics application) Please refer to "Quality Grades on NEC Semiconductor Devices" (Document No. C11531E) published by
NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
The information in this document is subject to change without notice.
Document No. IC-1555A (2nd edition)
(O.D. No. IC-5825D)
Date Published March 1997 P
Printed in Japan В© 1986 ВµPD7225
PIN CONFIGURATION: 52-pin QFP (Top View) S28 S27 S26 S25 S24 48 47 46 45 44 43 3 37 S17 VLC2 4 36 S16 VLC3 5 35 S15 VSS 6 34 S14 VDD 7 33 VDD SCK 8 32 S13 SI 9 31 S12 CS 10 30 S11 BUSY 11 29 S10 C/D 12 28 S9
S8 SI : Serial Input 18 19 20 21 22 23 24 25 27
26 S6 17 S4 15 16 COM1 N.C. 13
14 S7 VLC1 S5 S18 S3 38 S2 2 S1 SYNC S0 S19 COM3 40
39 COM2 1 COM0 CL2 RESET 42 41 CL1 : External Resistor 1 (External Clock)
: External Resistor 2 SCK : Serial Clock CL2 C/D : Command/Data RESET : Reset CS : Chip Select VLC1-VLC3 : Power Supply For LCD Drive BUSY : Busy VDD :Power Supply SYNC : Sync VSS : Ground S0-S31 : Segment I.C. : Internally Connected COM0-COM3 : Common
N.C. 2 S20 S29 …