PCM9880 is a dual-port isolated CAN bus communication card with PC/104 interface, which provides connection between PC and controller LAN. It adopts high-performance SJA1000 controller and 82C250 transceiver, and the baud rate of each port can reach 1Mbps. The built-in CAN controller has bus arbitration and automatic repeated transmission with error detection, which effectively avoids data loss and ensures the stability of the system. The port adopts direct memory address mapping to speed up the access speed of CAN controller. The two onboard controllers correspond to different memory addresses, so the two controllers can work independently at the same time. There is also a photoelectric isolator on the card, which can protect the PC and equipment from damage by ground loops, greatly enhancing the reliability of the system in harsh environments.
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