Digital processor input/output apparatus for analog, digital and discrete data
US4190898A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Mar 20, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Input/output (I/O) apparatus for a system is disclosed utilizing a digital processor for entering analog, digital and discrete data into the processor and receiving analog, digital and discrete data from the processor via an I/O data bus. A plurality of analog data signals are applied sequentially to an analog to digital converter via an analog input multiplexer. The resultant digital data are applied in bit parallel fashion to predetermined bits of the I/O data bus reserved for the input and output of analog data. Digital and discrete data is entered with the analog data by shifting the data from each of the digital and discrete data sources in bit parallel fashion into associated shift registers. The contents of the registers are shifted serially into respective predetermined bits of the data bus reserved for the input and output of the digital or discrete data. The contents of the plurality of shift registers for the digital or discrete data are shifted into the respective bits of the data bus in serial fashion while the sequence of parallel digital data from the analog inputs are entered in paralell into the data bus. Analog data is received from the bus via a digital-to-analog…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.