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FS6500 Datasheet(PDF) 77 Page - NXP Semiconductors |
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FS6500 Datasheet(HTML) 77 Page - NXP Semiconductors |
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77 / 153 page  NXP Semiconductors FS6500-FS4500-ASILD Safety power system basis chip with CAN FD and LIN transceivers Register Bit Flag type Effect 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_DOM Error Turn off CAN transceiver RXD_REC Error Turn off CAN transceiver DIAG_CAN_FD TXD_DOM Error Turn off CAN transceiver CAN_OT Error Turn off CAN transceiver DIAG_CAN_LIN CAN_OC Diagnostic No impact on CAN transceiver Table 14. CAN diagnostic and CAN error bits 12.9.3 Wake-up mechanism The device includes bus monitoring circuitry to detect and report bus wake-ups when the device is in LPOFF and when CAN mode configuration is different from sleep/no wake-up capability. Multiple dominant pulse wake-up detection is implemented. The event must occur within the t3PTOX timeout. t3PTOX = t3PTO1 or t3PTO2, depending on the SPI selection. The wake-up events are reported in the WU_SOURCE register. 12.9.3.1 Multiple pulse detection To activate wake-up report, three events must occur on the CAN-bus: - event 1: a dominant level longer than t1PWU followed by - event 2: a dominant level longer than t3PWU followed by - event 3: a dominant level longer than t3PWU. The three events and the timeout function avoiding a permanent dominant state on the bus generates permanent wake-up situation which would prevent system to enter in low-power mode. 5xTbit 1xTbit T_3pwu T_3pto wake up detected T_1pwu 1xTbit 1xTbit Bus Output of Wake up Receiver aaa-037792 Figure 63. Multiple pulse wake-up pattern illustration 12.10 LIN transceiver The local interconnect network (LIN) is a serial communication protocol, designed to support automotive networks in conjunction with a controller area network (CAN). The LIN transceiver is operational from a VSUP of 7.0 V to 18 V DC, and compatible with LIN protocol specification 2.0, 2.1(22), 2.2(23), and SAEJ2602-2(24). FS6500-FS4500-ASILD All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 8 — 5 August 2024 Document feedback 77 / 153 |
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