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TLE9255WLC датащи(PDF) 42 Page - Infineon Technologies AG |
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TLE9255WLC датащи(HTML) 42 Page - Infineon Technologies AG |
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42 / 100 page ![]() Data Sheet 42 Rev. 1.02 2018-02-02 TLE9255W CAN Partial Networking 7.2 Activation of Selective Wake Figure 39 shows the recommended way to activate the selective wake function in the TLE9255W. Figure 39 Activation of selective wake function The selective wake unit will acquire CAN bus synchronization within 4 classical CAN frames. On the first successfully synchronized classical CAN frame the SYNC bit is set to 1. Set SWK wake data. e.g. ID, ID_Mask, DATA Power on Reset SWK Unit is not enabled Check SYSERR 1 0 Enable Selective Wake (SWK_EN = 1) Confirm SWK configuration (CFG_VAL = 1) Check WK_STAT register Change into the Sleep Mode by a SPI command No WUP, LWU or WUF pending Any mode SWK Unit is enabled Clear WK_STAT register WUP, LWU or WUF pending MC decides how to procceed MC still wants to change into Sleep Mode SWK Config Error (CFG_VAL = 0) Yes Frame could not be detected by the selective wake unit. MC must make a diagnosis to find the reason (e.g. wrong baudrate). SWK configuration must be checked by MC No Set Baudrate for the SWK unit Transceiver enters Sleep Mode |
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