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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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ST92F124 Scheda tecnica(PDF) 331 Page - STMicroelectronics |
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ST92F124 Scheda tecnica(HTML) 331 Page - STMicroelectronics |
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331 / 429 page  331/429 CONTROLLER AREA NETWORK (bxCAN) CONTROLLER AREA NETWORK (Cont’d) 10.10.5.2 Time Triggered Communication Mode In this mode, the internal counter of the CAN hard- ware is activated and used to generate the Time Stamp value stored in the MTSRH and MTSRL registers. The internal counter is captured on the sample point of the Start Of Frame bit in both re- ception and transmission. 10.10.5.3 Reception Handling For the reception of CAN messages, three mailboxes organized as a FIFO are provided. In order to save CPU load, simplify the software and guarantee data consistency, the FIFO is managed completely by hardware. The application accesses the messages stored in the FIFO through the FIFO output mailbox. Valid Message A received message is considered as valid when it has been received correctly according to the CAN protocol (no error until the last but one bit of the EOF field) and It passed through the identifier fil- tering successfully, see Section 10.10.5.4 Identifi- er Filtering. 9 |
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