Version 11 (modified by Ilya Chigirev, 9 years ago) (diff)


Table of Contents

    Hardware Description

    The new chassis manager uses a completely new set of hardware compared to the older revisions. The design is based around the Lantronix XPort AR module, along with accompanying external hardware for interface to the node. The SDK for this device allows the implementation of custom code which is used to interface and understand CMC instructions.

    Major Hardware Components

    Lantronix XPort AR

    The Xport AR is an embedded device server, produced by Lantronix. It runs off of the Evolution OS®, combined with the custom software written using the Xport AR SDK. The Xport AR acts as the 'brains' of the CM3, handling all the networking tasks, as well the link between the CMC instruction commands, and the physical interface to the node. It has the following basic features:

    CPU Based on the DSTni-EX enhanced 16-bit, 120MHz x86 Architecture
    Memory 1.25 MB RAM and 4 MB FLASH
    Firmware upgradeable via FTP,TFTP, Serial Ports, Internal Web Server
    Diagnostics Built in diagnostics and comprehensive statistics
    Network Interface
    Interface Ethernet 10Base-T or 100Base-TX (Auto-Sensing)
    Connector RJ45
    Layer 3 Protocols TCP, UDP, IP, ARP, ICMP, SSH, SSL, XML, HTTP,
    FTP, TFTP, Telnet, CGI
    Serial Interface
    Interface CMOS (Asynchronous, 5V Tolerant)
    Data Rates 300 bps to 230,400 bps (selectable by 1bps increments)
    Characters 7 or 8 data bits
    Parity Odd, even, none
    Stop Bits 1 or 2
    Control Signals RTS, CTS, DSR, any PIO
    Flow Control XON/XOFF, RTS/CTS, User Selectable Characters

    The GPIOs are used to control the solid state relays used to power the node on/off and reset the node, as well as monitor the 'hardware status', see the next section for details on this.

    More information on the Xport AR can be found here, and documentation on the device can be found here.

    Voltage Monitor

    The CM3 has a PC voltage monitoring chip installed, the

    RS232 Level Shifter

    Solid State Relays

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