Figure 6-40 Cd-Vm00 Rs-232 Serial Cable (Dce) - NEC Univerge SV8100 System Hardware Manual

UNIVERGE SV8100/SV8300
System Hardware Manual
6.1.4.4 RS-232 Serial Cable (DCE)

Figure 6-40 CD-VM00 RS-232 Serial Cable (DCE)

6.1.4.5 USB Interface
The APSU provides two USB interfaces that are in full
compliance with the Universal Serial Bus Specification,
Revision 2.0. The connections to the USB interface are
through a dual Type-A plug connector. Some possible USB
devices are the following:
USB Keyboard
USB Memory Device
Per the USB spec, each USB device must start up in a low
power mode drawing one unit (100mA) of current. The
device may then request more power, up to 5 unit loads. For
the APSU application, current draw of greater than one unit
load per device shall not be allowed. To limit the current
draw on the 5V received from the backplane, a dual power
switch, TI TPS2046A or equivalent, shall be utilized to allow
power enable control to the USB ports and to protect against
short circuit events. If it becomes necessary to connect a
high power USB device to the APSU, an externally powered
USB hub could be inserted between the APSU and the high
power device.
6.1.4.6 VGA Display Interface
The APSU card provides a VGA display interface through a
standard DB-15 connector. The AMD LX-800 Processor
interfaces directly to the VGA connector. The VESA
standard pin-out shall be used. Per the VESA standard, 5V
is required to be supplied to the connector in order to
support the DDC I2C communication channel to the monitor
only when the monitor is in sleep mode. When the monitor
is not in sleep mode, 5V is provided by the monitor power
source.
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