Artesyn COMX-P4080 Installation and Use (August 2014) - Manual (Page 66)

Functional Description
COMX-P4080 COM Express Module Installation and Use (6806800L20C) 66
4.9 USB
The COMX-P4080 has four USB 2.0 ports, implemented by one USB PHY (USB3315) controller
and one four-port USB hub (USB2514). Between the controller and the hub is the ULPI bus,
which is the second group of multiplexing interface in the RGMII/ULPI, making the RCW
properly set for using this group.
All four USB port signals are routed to the COM-E connectors.
The operating mode of the USB hub is configured by hardware strapping, and can be
configured by the I2C bus by changing the state of the strapping pins. Hardware strapping is
set as the default. When configured, the I2C bus address of the USB bus is 0x58.
4.10 UART
There are a total of four universal asynchronous receiver/transmitters (UART) in the COMX-
P4080. Each UART has Tx and RX signals that are routed to the COM-E connectors. The UART
can also be in two dual UART (DUART), with Tx, Rx, CTS, RTS signals for each DUART. Optional
resistors are also available to determine whether UART or DUART are routed.
4.11 1588
The COMX-P4080 module supports signals for the IEEE 1588-v2 capable ethernet interface to
the COM-E connector. These signals include Trigger, Alarm, Clock-In and Pulse-Out.
4.12 SDHC
The COMX-P4080 provides an SD/MMC interface to the COM-E. It needs to change the switch
S2.6 according to the card type on the carrier.
Table 4-8 SD or Micro SD Card Type on the Carrier
S2.6 Card Type on the Carrier
ON SD card
OFF (Default) MicroSD card