Display and keyboard scanning for electronic calculation or the

Details Display and keyboard scanning for electronic calculation or the Display and keyboard scanning for electronic calculation or the

1977-12-02

1980-12-30

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340365R, 340756, 340802, 364700, 364712, 364900, G06F 314

Patent

active

042426758

ABSTRACT:
A variable function calculator utilizes a fixed program memory array such as a programmed read only memory in which a number of programs are stored depending upon the desired functions of the calculator. The calculator also incudes a program counter, an instruction register, control decoders, jump-condition circuits, a clock generator, a timing generator, digit and FLAG mask decoders, key input logic, a register and FLAG data storage array, a decimal and FLAG arithmetic logic unit, an output decoder, and a digit scanner which scans both the keyboard and display outputs. Aside from providing basic desk top calculator functions, the read only memory may be programmed so that the system provides metering functions, arithmetic teaching functions, control functions, etc. A preferred embodiment of the invention is capable of being fabricated as a monolithic integrated semiconductor system utilizing contemporary metal insulator-semiconductor techniques.

REFERENCES:
patent: 3492656 (1970-01-01), Hildebrandt
patent: 3715746 (1973-02-01), Hatano
patent: 4014013 (1977-03-01), McElroy
"MOS/LSI TMS 1802 NC One-Chip Calculator Circuit"; Texas Instruments Bulletin, CB-143; 21pp; (undated).

Affiliated with

Also associated with

Rating

Display and keyboard scanning for electronic calculation or the does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Display and keyboard scanning for electronic calculation or the , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display and keyboard scanning for electronic calculation or the will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-9874