Apparatus, system, and method for resetting an inter-integrated circuit data line using a negative voltage
US7526589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2007 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jun 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4295
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus, system, and method are disclosed for resetting an inter-integrated circuit (I2C) data line with negative voltage. A hang detection module detects an I2C hung line selected from a data line and a clock line wherein an I2C bus master and I2C bus slave communicate over the data line and the clock line. In response to the detected hung line, a negative voltage generator drives the data line to a specified negative voltage for a specified time interval. A clamp diode clamps the voltage of the data line to greater than a specified limit. On receiving the specified negative voltage, a voltage detector module detects the specified negative voltage of the data line. A timer module detects the specified negative voltage for the specified time interval. In response to detecting the specified negative voltage for the specified time interval, a reset module resets the I2C bus slave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.