Specifications
T4G Technical Reference
TRENTON Technology Inc.
1-7
•
x8, x16 construction
•
Non-stacked (NS)
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NOTE: Intel’s DDR memory interface design guidelines for the 845GV chipset validate
the use of non-stacked DIMM modules. Therefore, the T4G, which uses the 845GV
chipset, supports only non-stacked DIMMs in its standard system BIOS.
______________________________________________________________________
The following DIMM sizes are supported:
PCI L
OCAL
B
US
I
NTERFACE
The SBC is fully compliant with the PCI Local Bus 2.1 Specification. The PCI Local
Bus is 32 bits wide and runs at 33MHz. It interfaces to standard PCI option cards in the
backplane and to the on-board PCI-to-ISA bridge interface. The PCI Local Bus interface
to the backplane is compliant with the PCI Industrial Computer Manufacturers Group
(PICMG) 1.0 Specification.
U
NIVERSAL
S
ERIAL
B
US
(USB)
The SBC supports two high-speed USB 2.0 ports for data transfers up to 480Mbit/sec.
It also supports USB 1.1 devices for data transfers at 12 or 1.5Mbit/sec. The Universal
Serial Bus (USB) is an interface allowing for connectivity to many standard PC periph-
erals via an external port.
V
IDEO
I
NTERFACE
The analog video interface of the 845GV supports pixel resolutions up to 2048 x 1536
(QXGA) at a refresh rate of 60Hz. The graphics and memory controller hub (GMCH) of
the 845GV has an integrated graphics accelerator that supports high performance 3D/2D
graphics and video.
The amount of system memory used for video is determined by the SBC’s BIOS and by
the 845GV’s Dynamic Video Memory Technology (DVMT) feature. In the BIOS, the
user can allocate up to 8MB of system memory to support video; DVMT can dynami-
cally allocate up to 64MB. DVMT memory allocations take the form of allocation
requests from the graphics driver to the operating system based on the needs of the
application software. DVMT returns the memory to the operating system when the
application no longer needs the additional video memory support. The specific amount
of system memory used by the chipset’s integrated video interface depends on the pixel
resolution, color depth setting and graphic demands of the application.
Software drivers for enhanced performance and resolution are available for most popular
operating systems.
DIMM
Size
DIMM Type
Non-ECC
Component
Construction
64MB
128MB
256MB
512MB
1GB
Unbuffered
Unbuffered
Unbuffered
Unbuffered
Unbuffered
8M x 64
16M x 64
32M x 64
64M x 64
128M x 64
x8, x16, NS
x8, x16, NS
x8, x16, NS
x8, x16, NS
x8, x16, NS
