Interfaces and Connectors
EBX-11 Reference manual
35
USB
The USB interface on the EBX-11 is OHCI (Open Host Controller Interface) and EHCI (Enhance
Host Controller Interface) compatible, which provides a common industry software/hardware
interface. There are four USB ports, one at connector J20, one at J21, and two at J10. The J20
and J21 connectors are standard USB Series A sockets. The USB interfaces at J10 are connected
using the CBR-4004 screw terminal board (pinout below) or a custom cable.
BIOS
C
ONFIGURATION
The USB controller can be enabled or disabled in CMOS Setup. The USB controller uses PCI
interrupt “INTD#”. CMOS Setup is used to select the IRQ line routed to each PCI interrupt line.
Table 14 USB Interface Connector J10
CBR-4004
J1 Pin
Signal
Name
Function
1
GND
Ground
2
USBP0PWR
+5V (Protected)
3
USBP0+
Channel 0 Data +
4
USBP0
-
Channel 0 Data
-
5
GND
Ground
CBR-4004
J2 Pin
Signal
Name
Function
6
USBP1PWR
+5V (Protected)
7
USBP1+
Channel 1 Data +
8
USBP1
-
Channel 1 Data
-
9
GND
Ground
10
GND
Ground
These connectors use IEC 61000-4-2-rated TVS components to help protect against ESD
damage.
On revision 4.01 and earlier boards, one connector (J13) provided the interface to both USB2 and
USB3. The connector was a 2mm 10-pin header. The pinout for this connector is shown below.
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