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FS6407 bảng dữ liệu(PDF) 59 Page - NXP Semiconductors |
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FS6407 bảng dữ liệu(HTML) 59 Page - NXP Semiconductors |
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59 / 111 page  NXP Semiconductors 59 FS6407/FS6408 Figure 44. Overtemperature behavior 6.8.2.6 Distinguish CAN diagnostics and CAN errors The CAN errors can generate an interruption while the CAN diagnostics are reported in the digital for information only. The interruption generated by the CAN errors can be inhibited setting INT_inh_CAN bit at “1” in the “INIT INT” register. The list of CAN Diagnostic and CAN Error bits are provided in Table 11. 6.8.3 Wake-up mechanism The device include bus monitoring circuitry to detect and report bus wake-ups when the device is in LPOFF and CAN mode configuration is different than Sleep/NO wake-up capability. Two wake-up detection are implemented: single dominant pulse and multiple dominants pulses. The wake-up mechanism is selected by the SPI in the main logic and wake-up events are reported. The event must occur within the t3PTOX timeout. t3PTOX = t3PTO1 or t3PTO2, depending on the SPI selection. Table 11. CAN diagnostic and CAN error bits Register Bit Flag Type Effect DIAG CAN1 CANH_batt Diagnostic No impact on CAN transceiver CANH_gnd Diagnostic No impact on CAN transceiver CANL_batt Diagnostic No impact on CAN transceiver CANL_gnd Diagnostic No impact on CAN transceiver CAN_dominant Error Turn OFF CAN transceiver RXD_recessive Error Turn OFF CAN transceiver TXD_dominant Error Turn OFF CAN transceiver DIAG CAN CAN_OT Error Turn OFF CAN transceiver CAN_OC Diagnostic No impact on CAN transceiver TXD high low dominant recessive Event 1 BUS Temperature Hysteresis Event 1: over temperature detection. CAN driver disable. Event 2: temperature falls below “overtemp. threshold minus hysteresis” => CAN driver remains disable. Event 2 dominant Event 1 Hysteresis Event 2 dominant Event 3 Event 3: temperature below “overtemp. threshold minus hysteresis” and TxD high to low transition => CAN driver enable. Event 4 Event 4: temperature above “overtemp. threshold minus hysteresis” and TxD high to low transition => CAN driver remains disable. Event 3 Overtemperature Threshold |
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