Serial communication device with multi-mode operation of message receive buffers
US6912594B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Dec 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/90
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A CAN module comprising a buffer memory comprising a data and address input and a plurality of addressable buffers, a data receive register being coupled with the buffer memory receiving data from a serial data stream, a filter register, a comparator comparing the filter register value with an identifier transmitted in the serial data stream generating an acceptance signal, a buffer pointer coupled with the comparator to receive said acceptance signal, and a multiple function address register unit comprising a first mode in which the unit receives an address from the buffer pointer for addressing the buffer memory and a second mode in which the acceptance signal is coupled with an incrementer within the multiple function address register unit wherein the incrementer increments the address register upon generation of the acceptance signal. The arrangement can be switched between two modes. The module operates in a first mode and dynamically assigns any filter register to any buffer within the buffer memory. The second mode operates as a FIFO memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.