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CP307
Functional Description
ID 34424, Rev. 3.0
Page 2 - 13
P R E L I M I N A R Y
2.3.2
USB Interfaces
The CP307 supports six USB 2.0 ports (two front I/O, two front I/O on the 8HP version, and two
on the Rear I/O module). On the USB 2.0 Rear I/O ports, it is strongly recommended to use a
cable below 3 meters in length for USB 2.0 devices. The USB 2.0 ports are high-speed, full-
speed, and low-speed capable. Hi-speed USB 2.0 allows data transfers of up to 480 Mb/s - 40
times faster than a full-speed USB (USB 1.1).
One USB peripheral may be connected to each port.
To connect more USB devices than there are available ports, an external hub is required.
2.3.3
Graphics Controller
The 945GM Express GMCH includes a highly integrated graphics accelerator delivering high
performance 3D, 2D graphics capabilities. The internal graphics controller has two
independent display pipes allowing for support of two independent display screens.
Integrated 2D/3D Graphics:
• Intel® Gen3.5 integrated graphics engine
• Smart 2D display technology (S2DDT)
• Dynamic video memory technology
• Integrated 400 MHz RAMDAC
• Resolution up to 2048 x 1536 pixels @ 75 Hz (QXGA)
• Integrated H/W Motion Compensation for MPEG2 decode
2.3.3.1
Graphics Memory Usage
The 945GM Express GMCH supports the Dynamic Video Memory Technology (DVMT 3.0).
This technology ensures the most efficient use of all available memory for maximum 3D
graphics performance. DVMT dynamically responds to application requirements allocating
display and texturing memory resources as required.
The graphics controller is fed with data from the 945GM memory controller. The graphics per-
formance is directly related to the amount of memory bandwith available.
Note ...
The CP307 host interfaces can be used with maximum 500 mA continuous
load current as specified in the Universal Serial Bus Specification, Revision
2.0. Short-circuit protection is provided. All the signal lines are EMI-filtered.
Figure 2-2: USB Connectors
J9 and J10
J9
J10
4
2
3
1
4
2
3
1
Table 2-9: USB Connectors J9 and J10 Pinout
PIN
SIGNAL
FUNCTION
I/O
1
VCC
VCC
--
2
UV0-
Differential USB-
I/O
3
UV0+
Differential USB+
I/O
4
GND
GND
--
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