SMART Embedded Computing MC1600, Installation And Use Manual

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58 MC1600 Extreme Edge Server Installation and Use (6806870A02B)
System Overview
System Overview
On the Extreme Edge Server, there is a second on-board BIOS SPI flash device. This
device is used to store a
golden BIOS image for recovery in the event the primary BIOS
image is corrupted.
1.7.4 USB Interface
Broadwell-DE contains one eXtensible Host Controller Interface (xHCI) controller and one
Enhanced Host Controller Interface (EHCI) controller.
1.7.4.1 USB 3.0 Ports (xHCI)
For each CPU, port 1 from the xHCI controller is routed to a USB 3.0 Type A connector on
the front panel of the server.
1.7.4.2 USB 2.0 Ports (EHCI)
The EHCI controller supports up to four USB 2.0 high-speed root ports. USB 2.0 allows
data transfers up to 480Mb/s.
For each CPU, port 1 from the EHCI controller is routed to the front panel USB Type A
connector. Port 1 implements a USB 2.0 based debug port that provides support for
debugger software to interact with the CPU.
For CPU1 only, port 2 of the EHCI controller is routed to the BMC. For CPU2, this port is
unused. The other ports of the EHCI controller are unused.
1.7.5 UART Interface
A dual UART controller is integrated in the Broadwell-DE processor.
Serial console COM0 of each CPU is connected to a USB to Dual UART bridge device,
Silicon Labs CP2105F01-GM (5106811D61). The CP2105 includes a USB 2.0 full speed
function controller, USB transceiver, oscillator, one-time programmable ROM, and two
asynchronous serial data ports (UARTs) with full modem control signals. Because there are
two UART ports on the CP2105, one device can be shared between both CPUs. The UART
interfaces are connected to the processors and the USB port of CP2105 is connected to a
Type A USB connector on the front panel for access to the consoles of both CPUs through
a single USB connector.
The computer used to display the console information must have the CP2105 software
driver installed. Drivers for Linux or Windows are available at the Silicon Labs web site,
www.silabs.com . The CP2105 device is powered from the host cable so that the terminal
session is not lost when system power is cycled.
Serial port COM1 of each CPU is routed to the BMC through the Glue CPLD.