Microprogrammable device code tracing with single pin transmission of execution event encoded signal and trace memory storing instructions at same address
US8656366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2010 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Aug 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/3636
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microprogrammable electronic device has a first code memory storing instructions, and is configured to execute each instruction in the first code memory at a respective instruction cycle. The system comprises binary code generating means, and a tracing device. The binary code generating means form part of the device, and are configured to generate and output on a single pin of the device binary codes, each of which indicates a corresponding execution-related event, is generated and outputted at a corresponding instruction cycle, and has N bits, where N is an integer >=2. The tracing device is coupled with the single pin to receive the binary codes, and has a second code memory in which the instructions are stored. The tracing device is configured to trace instructions executed by the device, on the basis of the received binary codes and of the instructions stored in the second code memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.