Field instrument with data bus communications protocol

Details Field instrument with data bus communications protocol Field instrument with data bus communications protocol

1996-09-30

1999-07-27

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710105, 710106, 710110, 710 9, 709208, 34082507, G06F 1300

Patent

active

059283459

ABSTRACT:
The present invention includes a process control instrument having an improved data bus protocol for facilitating communications between master and slave nodes. The process control instrument includes a microprocessor operating in accordance with the SPI data bus protocol, first and second peripheral devices, and a data bus coupled to the microprocessor and the first and second peripheral devices. The improved data bus protocol used in the process control instruments of the present invention provides numerous advantages such as reduced printed circuit board space requirements and greater interchangeability of peripheral and master node components.

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Dipl.-Ing. Viktor Wolf, "Datenakquisition mit dem SPI-Bus", Elektronik, vol. 36, Jun. 26, 1987, No. 13, pp. 96-100.
Motorola M68HC11 Reference Manual, 1991.

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