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L7VTA3 V3.1a
Universal Serial Bus Specification Revision 2.0.
The USB 2.0 supports data transfer rates up to 480Mb/sec for
high-speed devices and specifies a microframe that will be
th
1/8
of a 1msec frame. This allows the USB 2.0 devices to
have small buffers even at high data rates.
The USB 1.1 connectors and other full speed cables can sup-
port the higher speed of USB 2.0 without any changes.
The chipset has the following advanced USB features:
•
Compliant with Enhanced Host Controller Interface
(EHCI) Specification Revision 0.95 and Universal Host
Controller Interface (UHCI) Specification Revision 1.1
•
PCI multi-function device consists of two UHCI Host Control -
lers for full/low -speed signaling and one EHCI Host
•
Controller core for high-speed signaling
•
Supports PCI-Bus Power Management Interface Specifi-
cation release 1.1
•
Legacy support for all downstream facing ports
•
Supports Ultra ATA100 drives and backward compatible
Promise 20265
with Ultra ATA66/33 & EIDE drives (identical drives rec-
(optional)
ommended)
•
Supports IDE RAID 1 (mirroring) or 0 (striping)
•
Supports UDMA 5/4/3/2/1/0, DMA 2/1/0, PIO 4/3/2/1/0
modes
•
Two independent IDE channels support up to four
UDMA/100/66/33 or EIDE drives
Onboard LAN
The Realtek RTL8100B LAN chip is incorporated in the chipset
(optional)
providing the mainboard with integrated Ethernet PCI LAN
capabilities.
Expansion
The mainboard comes with the following expansion options:
Options
•
Five 32-bit PCI slots
•
An 4xAGP slot
•
A Communications Network Riser (CNR) slot
•
Two IDE connectors which support four IDE channels and
a floppy disk drive interface
•
IDE RAID 1, 0 supported by Promise PDC20265R con-
troller (optional)
The mainboard supports Ultra DMA bus mastering with trans-
fer rates of 33/66/100/133 MB/sec.
Note: If the mainboard incorporates the VT8233A
Integrated I/O
The mainboard has a full set of I/O ports and connectors:
•
Two PS/2 ports for mouse and keyboard
•
Two serial ports
•
One parallel port
•
One MIDI/game port
•
Two USB ports
•
Audio jacks for microphone, line-in and line-out
Southbridge chipset, the Ultra DMA bus master-
ing can support up to 133 MB/sec transfer rate.
For VT8233 Southbridge chipset, the transfer rate
can support up to 100MB/sec only.
3
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