Communications network, a dual mode data transfer system therefor
US5579299A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1994 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Dec 16, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A link apparatus in a node of a multinode, collision-resolution, multiplexing communications system connected between a microcontroller (MCU) that receives measurand data from an input device such as a sensor and an integrated driver and receiver (IDR) for assuming some of the functions of the MCU in delivering and receiving messages to and from a single-wire bus communications network. The MCU contains firmware for converting the measurand data into data bytes, the link apparatus and the MCU contain circuits for effecting a SPI transfer and the link apparatus contains additional circuits for converting each bit of the message bytes into variable pulse width modulated (VPWM) bits. The VPWM bits get converted into J1850 symbols before being placed on a single- wire communications bus. Circuits are provided in the link apparatus for checking arbitration of the protocol and data symbols communicated over the bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.