User's Guide

BreadCrumb
®
LX4 User Guide Rajant Corporation
Version: 2.12 03-100117-001
2.4.3 USB
The signals that interface to the BreadCrumb LX4 device's USB port are located on the 19-pin
Amphenol connector on the enclosure (see Figure 6 and Figure 5). The port is compliant to the
Enhanced Host Controller Interface (EHCI) and USB Transceiver 2.0 Macrocell Interface (UTMI+)
Level 2 specifications. The port supports all three standard data transfer rates of low speed
(1.5Mbps), full speed (12Mbps), and high speed (480Mbps). The power switch for the port includes
over current protection, thermal protection, in-rush current limiting, and hot-plug noise filtering.
The USB port can be used to perform BreadCrumb firmware upgrades and USB-based zeroize. It
can also interface to an optional GPS receiver accessory available from Rajant.
2.5 LX4 Cable Assembly
The LX4 comes with a standard cable assembly(part number 06-100044-001) that connects to the
BreadCrumb's 19-pin Amphenol connector (see Figure 7). The cable assembly includes two
Ethernet ports and one USB port. The ETH0 port of the cable assembly supports Passive Power
over Ethernet (Passive PoE), and therefore acts as a dual function Ethernet and DC power input port
for the BreadCrumb LX4.
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