Electronic calculator or digital processor chip with multiple co

Details Electronic calculator or digital processor chip with multiple co Electronic calculator or digital processor chip with multiple co

1974-11-19

1976-11-09

Malzahn, David H.

Registers

Transfer mechanism

Traveling pawl

3401725, 340324R, G06F 314, G06K 1518

Patent

active

039913058

ABSTRACT:
An MOS/LSI semiconductor chip for providing the functions of an electronic calculator or digital processor includes a data storage RAM, a ROM for program instruction storage, an arithmetic unit for performing operations on data, and control circuitry for defining the functions of the machine in response to instructions from the ROM as well as conditions in the machine and inputs from external. Input and output terminals are provided, as for keyboard input and display output. The operation is digit oriented in that an instruction accesses one digit of the RAM. One set of output terminals may be used for sequentially scanning the display digits and keyboard matrix; several of these may be actuated in any order or code combination, so the same terminals may be used to address an auxiliary RAM or drive a printer. Another set of output terminals may provide the segment outputs to the display. The two sets of output terminals are separately controllable. The data to both sets of output terminals is latched, so the machine can execute other instructions while a given output subsists.

REFERENCES:
patent: 3755806 (1973-08-01), Bunting
patent: 3781852 (1973-12-01), White et al.
patent: 3800129 (1974-03-01), Vmstattd
patent: 3858197 (1974-10-01), Shimizu
patent: 3863060 (1975-01-01), Rode et al.

Affiliated with

Also associated with

Rating

Electronic calculator or digital processor chip with multiple co does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic calculator or digital processor chip with multiple co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic calculator or digital processor chip with multiple co will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1727156