IO circuit and access control signal generation circuit for IO circuit
US10749511B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 9, 2019 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Aug 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00315
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides an IO circuit and an access control signal generation circuit for the IO circuit. In one implementation, the access control signal generation circuit includes: a bias module coupled with an IO port, for generating an access control signal according to an IO port signal and an IO control signal, where a voltage value of the access control signal is a maximum value of a voltage value of an IO port voltage division signal and a voltage value of the IO control signal, and the voltage value of the IO port voltage division signal is a percentage of a voltage value of the IO port signal; an access control module coupled with the bias module, the access control module configured to control cut-off or conduction when receiving the access control signal and the IO port signal and outputting a first interface signal; and a higher-selection module configured to generate a second interface signal according to an IO power source signal and the IO port signal. In the present disclosure, the voltage of the first interface signal varies according to the voltage of an IO port, so as to resolve the problem of reliability, thereby improving the open-drain performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.