Specifications

CM-X300 CoM
32 CM-X300 Reference Guide Rev 1.31 30-Dec-2010
3.3.9.2 USB Interfaces Routing
Table 23 below describes USB interfaces routing differences between C624 and C624M
module configurations.
Table 23 USB Interfaces
CAMI USB
Interface
CM-X300-C625
CM-X300-C625M
USB1
USB Host Controller
(differential port1 IF on PXA300)
USB Host Controller
(single ended port 3 IF on PXA310)
USB2
USB Host Controller or
USB Device Controller
(OTG diff port 2 IF on PXA300)
USB2.0 Device Controller or
USB Host Controller
(ULPI IF on PXA310)
USB3
USB 2.0 Device Controller (UTMI IF) on
PXA300
None
3.3.9.3 USB1 Interface
The USB1 CAMI interface is routed to the PXA300‘s differential USB port 1 or to the
PXA310‘s single ended USB port 3 (by means of the onboard transmitter). In both cases
this interface is controlled by the CPU‘s USB host controller. The module‘s integrated
Bluetooth uses this port; therefore it‘s not available with "W" option.
Table 24 USB1 CAMI Port Signals
CM-X300 Signal
Name
Type
Description
{USBH-P, USBH-N}
I/O
USB Full Speed Host Data
Differential pair that connects to the USB host controller.
3.3.9.4 USB2 Interface
This interface has different functionality in modules with PXA300 and PXA310 processor.
In the C624 modules (PXA300) this interface provides USB1.1 host/device and OTG
functionality and is routed to the PXA300‘s differential OTG USB port 2.
In the C624M modules (PXA310) this interface provides USB2.0 device or USB1.1 host
functionality and is routed to the PXA300‘s ULPI interface by means of an onboard ULPI
transmitter.
Table 25 USB2 CAMI Port Signals
CM-X300 Signal
Name
Type
Description
{USB-OTG-P,
USB-OTG-N}
I/O
USB Full Speed Host/Device/OTG and USB 2.0 Device Data
Differential pair that connects to either the USB host controller, the USB
device controller or USB 2.0 Device controller. On-The-Go functionality is
available on this port.
USB-OTG-ID
I
Provides the OTG ID configuration.
3.3.9.5 USB3 Interface
This interface is available only on the C624 (PXA300) modules. It provides USB 2.0 high-
speed device functionality and is routed to the UTMI interface of PXA300 by means of an
onboard UTMI transmitter.