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SC312XDP512F0MPVR датащи(PDF) 421 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 421 Page - Freescale Semiconductor, Inc |
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421 / 1348 page ![]() Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV3) MC9S12XDP512 Data Sheet, Rev. 2.21 Freescale Semiconductor 421 • Internal timer for time-stamping of received and transmitted messages • Three low-power modes: sleep, power down, and MSCAN enable • Global initialization of configuration registers 10.1.4 Modes of Operation The following modes of operation are specific to the MSCAN. See Section 10.4, “Functional Description,” for details. • Listen-Only Mode • MSCAN Sleep Mode • MSCAN Initialization Mode • MSCAN Power Down Mode 10.2 External Signal Description The MSCAN uses two external pins: 10.2.1 RXCAN — CAN Receiver Input Pin RXCAN is the MSCAN receiver input pin. 10.2.2 TXCAN — CAN Transmitter Output Pin TXCAN is the MSCAN transmitter output pin. The TXCAN output pin represents the logic level on the CAN bus: 0 = Dominant state 1 = Recessive state 10.2.3 CAN System A typical CAN system with MSCAN is shown in Figure 10-2. Each CAN station is connected physically to the CAN bus lines through a transceiver device. The transceiver is capable of driving the large current needed for the CAN bus and has current protection against defective CAN or defective stations. |
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