LC7980

The LC7980 is a controller LSI for the liquid crystal dot maxtrix graphic display.It stores display data sent from the 8-bit microcomputer in the display RAM attached externally and generates dot maxtrix LC drive signals.

Features of the  LC7980 are:(1)liquld crystal dot matrix graphic display controller;(2)display control capacity;(3)character generator ROM is 7360 bits;(4)interfacing allowed with the 80-series MPU;(5)display duty(selectable by program) from static to 1/256 duty;(6)a varety of instruction functions scroll,cursor on/off/blink,character blink,bit manipulation;(7)built-in terminal for controlling external RAM;(8)display system is B system;(9)data output format;(10)data transfer rate is 10M bits/sec.max.;(11)built-in oscillator (X'tal,capacitor attached externally);(12)low power demand;(13)single +5V power supply.

The absolute maximum ratings of the LC7980 can be summarized as:(1):the parameter is maximum supply voltage,the symbol is VDDmax,the rating is -0.3 to +7.0,the unit is V;(2):the parameter is input voltage,the symbol is VIN,the rating is -0.3 to VDD+0.3,the unit is V;(3):the parameter is output voltage,the symbol is VOUT,the rating is -0.3 to VDD+0.3,the unit is V;(4):the parameter is allowable power demand,the symbol is Pdmax,the rating is 200,the unit is mW;(5):the parameter is operating temperature,the symbol is Topr,the rating is -20 to +75,the unit is ;(6):the parameter is storage temperature,the symbol is Tstg,the rating is -55 to +125,the unit is .

The electrical characteristics of the LC7980 can be summarized as:(1):the parameter is input leak current,the symbol is IIN,the min is -5,the max is 5,the unit is A;(2):the parameter is supply current,the symbol is IDD,the typ is 6,the max is 9,the unit is mA;(3):the parameter is pull-up current,the symbol is IPL,the min is 10,the max is 20,the unit is A.