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8399
8399
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Integrated bus-mastering dual full-duplex direct-sound AC97-link-compatible sound system.
Plug and Play controller that allows complete steer ability of all PCI interrupts and internal interrupts / DMA
channels to any interrupt channel. One additional steerable interrupt channel is provided to allow plug and
play and reconfigure ability of onboard peripherals for Windows family compliance.
The VT8235CD also enhances the functionality of the standard ISA peripherals. The integrated interrupt controller
supports both edge and level triggered interrupts channel by channel. The integrated DMA controller supports type F
DMA in addition to standard ISADMA modes. Compliant with the PCI-2.2 specification, the VT8235CD supports
delayed transactions and remote power management so that slower ISA peripherals do not block the traffic of the
PCI bus. Special circuitry is built in to allow concurrent operation without causing dead lock even in a PCI-to-PCI
bridge environment. The chip also includes eight levels (double words) of line buffers from the PCI bus to the ISA
bus to further enhance overall system performance.
CPU/Cache North Bridge System Memory
VT8235
487 BGA
Expansion
Cards
On board
LPC I/O
Vlink
Interface
DIMM Module ID
SMB
RTC
Crystal
Boot Rom
USB 2.0 Ports 0~5
Keyboard/Mouse
IDE Primary and Secondary
AC97 Link
MII Fast Ethernet Interface
APLC
CA
CD
MA/Command
MD
GPIO, Power Control, Reset
Figure 1. PC System Configuration Using the VT8233
LPC
PCI
Sideband Signals
Init/A20M#
INIR/NMI
SMI/Stop CLK
FERR/IGNNE Sleep
MiTac Secret
Confidential Document