Output control circuit and output control method
US6700402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | May 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is provided an output control circuit provided in an integrated circuit that enables any arbitrary internal signal to be specified and output from any output terminal, and hence enable the monitoring of a large number of internal signals even if only a small number of output terminals are provided. A plurality of external output terminals output a plurality of signals existing in the integrated circuit. A plurality of signal output circuits are provided, to which the plurality of internal signals are mutually input. Each of the signal output circuits comprises a signal group select circuit that selects a predetermined signal group from the plurality of internal signals, a logic circuit that carries out logical operations on the selected signal group, and an external output circuit that outputs signals resulting from the logical operations via one of the external output terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.