Rear Transition Module
5-8
The total cable length must not exceed 12 inches. Also, if two drives are
connected, they must be no more than six inches apart.
USB Port Connector
USB provides an expandable, hot-pluggable Plug and Play serial interface that ensures a
standard, low-cost connection for peripheral devices. Devices suitable for USB range
from simple input devices such as keyboards, mice, and joysticks, to advanced devices
such as printers, scanners, storage devices, modems, and video conferencing cameras.
USB 2.0 has a raw data rate at 480Mbps, and it is rated 40 times faster than its
predecessor interface, USB 1.1, which tops at 12Mbps.
USB port 1 is available on the front panel using a standard connector as shown in Figure
2-10 below. The other two USB ports USB-2 and 3, are routed out the VMEbus P2
connector and can be accesses either directly off the VMEbus P2 connector using the pin
assignment shown in Fig 5-3 and table 5-4.
The USB +5 V supplies are protected with a polyswitch. This device will open up if +5 V
is shorted to GND. Once the shorting condition is removed, the polyswitch will allow
current flow to resume.
Table 5-7 USB Port Connector Pin out
Figure 5-3 showing the USB connector.
Table 5-8 USB Port Connector Pin
out from P2
Pin
Signal
1
+5V
2
USBP0-
3
USBP0+
4
GND
5
6
VMEbus P2
Signal Name
P2-row-z 17
USB3_GND
P2-row-z 18
GND
P2-row-z 19
USB3+
P2-row-z 20
GND
P2-row-z 21
USB3-
P2-row-z 22
GND
P2-row-z 23
USB3_PWR
P2-row-z 24
GND
P2-row-z 25
USB2_GND
P2-row-z 26
GND
P2-row-z 27
USB2+
P2-row-z 28
GND
P2-row-z 29
USB2-
P2-row-z 30
GND
P2-row-z 31
USB2_PWR
P2-row-z 32
GND
Содержание XVME-689-VR7
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