Motorola MC14500B
Encyclopedia
The Motorola
MC14500B Industrial Control Unit (ICU) is a CMOS
one-bit microprocessor
designed for simple control applications. It is well-suited to the implementation of ladder logic
, and thus could be used to replace relay
systems and programmable logic controllers. The MC14500B unit does not include program counter, therefore the size of supported memory is dependent on the implementation of program counter.
The ICU architecture is similar to that of the DEC
PDP-14 computer.
Motorola
Motorola, Inc. was an American multinational telecommunications company based in Schaumburg, Illinois, which was eventually divided into two independent public companies, Motorola Mobility and Motorola Solutions on January 4, 2011, after losing $4.3 billion from 2007 to 2009...
MC14500B Industrial Control Unit (ICU) is a CMOS
CMOS
Complementary metal–oxide–semiconductor is a technology for constructing integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits...
one-bit microprocessor
Microprocessor
A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...
designed for simple control applications. It is well-suited to the implementation of ladder logic
Ladder logic
Ladder logic is a programming language that represents a program by a graphical diagram based on the circuit diagrams of relay logic hardware. It is primarily used to develop software for programmable logic controllers used in industrial control applications...
, and thus could be used to replace relay
Relay
A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism mechanically, but other operating principles are also used. Relays are used where it is necessary to control a circuit by a low-power signal , or where several circuits must be controlled...
systems and programmable logic controllers. The MC14500B unit does not include program counter, therefore the size of supported memory is dependent on the implementation of program counter.
The ICU architecture is similar to that of the DEC
Digital Equipment Corporation
Digital Equipment Corporation was a major American company in the computer industry and a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s...
PDP-14 computer.