Serial bus device with address assignment by master device
US7565470B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2007 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Mar 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4252
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention offers a daisy chain serial bus system. For bus construction, the slave device has a first data transmission port to transfer serial data with its upward connected device and a second data transmission port to transfer serial data with its downward connected device. The most upward slave device is connected to a master device. In each slave device, the input data from a first data transmission port is transferred to a data input gate in a second data transmission port. There is a control register in each slave device to control the data input gate of the second data transmission port. After the bus system has been started, only the slave device connected to the master device can receive the data from the master device, so that the master device can assign the first device address to the slave device connected to it, then, the master device can assign the second device address to the slave device next connected to the first slave device on the bus. By this way, the master device can assign the device address to each slave device on the bus one by one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.