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ASL5015FHN 数据表(PDF) 32 Page - NXP Semiconductors |
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ASL5015FHN 数据表(HTML) 32 Page - NXP Semiconductors |
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32 / 69 page  NXP Semiconductors ASL5xxxyHz Matrix LED Controller (MLC) ASL5xxxyHz All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved. Product data sheet Rev. 2.1 — 5 February 2019 32 / 69 Table 24. Limp Home mode deactivation sequence Deactivation step Data to LHM_EXIT[6:4] Step 1 001 Step 2 010 Step 3 100 This sequence could be applied to any single IC or as a broadcast message. Sequence to exit LHM in a single IC: CMD 3 = 000011, target MLC's LHM_Exit [6:4] bits with 3 bytes of data in the data field. Only one CAN message is needed to exit the LHM status. The order in Table 25 shows from byte 0 to byte 2 in the CAN message data field. Table 25. Limp Home mode exit sequence messages Address Register D7 D6 D5 D4 D3 D2 D1 D0 3Ch LHM 0 0 0 1 111 0 Address Register D7 D6 D5 D4 D3 D2 D1 D0 3Ch LHM 0 0 1 0 111 0 Address Register D7 D6 D5 D4 D3 D2 D1 D0 3Ch LHM 0 1 0 0 111 0 Message: Command = 3 Data_0 = 1E Data_1 = 2E Data_2 = 4E Sequence to exit LHM with a broadcast or selective message: Command 3 is used for selective LHM exit and command 38 for broadcast LHM exit. Once the deactivation sequence is completed, the MLC is immediately fully operational. LEDs will follow LHM configuration until the microcontroller starts a new sequence. 8.15 Communication interface The ASL5xxxyHz family uses a CAN interface to communicate with an external microcontroller. The CAN interface can be used for setting all the registers related to the 12 available channels and other configuration registers. See Section 10 "ASL50xxyHz Register map" and Section 11.1 "ASL51xxSHy Register MAP". If the MLC system is on a board other than the board that has the microcontroller, a CAN physical layer should be used (CAN transceiver) and TXD and RXD should be connected between the transceiver and the different MLC ICs. If the MLC system is on the same board of the microcontroller, a physical layer is not needed and just the TXD and RXD pins of the different ICs should be connected, as well as a pull-up resistor and a bridge between TXD and RXD line. The pull-up resistor should not allow current higher than 4 mA in the TXD and RXD pins. |
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