Ampro Corporation 700 manual USB Interfaces J15A/B, J21A/B, Primary USB0 and USB1 J15A/B

Chapter 3 Hardware

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,	GND	Goes to ground thorough a choke
9, 10

Notes: The shaded area denotes power or ground.

ReadyBoard 700 Reference Manual 43