Specifications

Chapter 3 Hardware
ReadyBoard 700 Reference Manual 43
USB Interfaces (J15A/B, J21A/B)
The ReadyBoard 700 contains one root USB hub with four functional USB ports. The PC-style (or
Standard) connector (J5A/B) provides two of the four USB ports (USB0 and USB1). The other two
USB ports share a single 10 pin header (J21A/B) on the board.
Features implemented in the USB ports include the following:
• One root hub and two USB ports on connector (J15A/B)
• One root hub and two USB ports on connector (J21A/B)
• USB v.1.1 and Universal OHCI v.1.1 compatible
• Integrated physical layer transceivers
• Over-current fuses, located on the board, are used on all four USB ports
• USB0 and USB1 have independent fuses and USB2 and USB3 share a single fuse on the board.
See Table 2-4.
Primary USB0 and USB1 (J15A/B)
Table 3-15. USB 1 & 2 Interface Pin/Signal Descriptions (J15/B)
Pin # Signal Description
1 +5V +5V through a fuse (F1)
2 USBP0- Universal Serial Bus Port 0 Data Negative
3 USBP0+ Universal Serial Bus Port 0 Data Positive
4 GND Goes to ground thorough a choke
5 +5V +5V ±5% through a fuse (F3)
6 USBP1- Universal Serial Bus Port 1 Data Negative
7 USBP1+ Universal Serial Bus Port 1 Data Positive
8 GND Goes to ground thorough a choke
Notes: The shaded area denotes power or ground.
Secondary USB2 and USB3 (J21A/B)
Table 3-16. USB 2 & 3 Interface Pin/Signal Descriptions (J21A/B)
Pin # Signal Description
1, 2 +5V +5V ±5% through a fuse (F4)
3 USBP2- Universal Serial Bus Port 2 Data Negative
4 USBP3- Universal Serial Bus Port 3 Data Negative
5 USBP2+ Universal Serial Bus Port 2 Data Positive
6 USBP3+ Universal Serial Bus Port 3 Data Positive
7, 8,
9, 10
GND Goes to ground thorough a choke
Notes: The shaded area denotes power or ground.