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LCD PC E
LCD PC E
-
-
8590 MAINTENANCE
8590 MAINTENANCE
The VT8235 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 ISA DMA modes. Compliant with the PCI-2.2 specification, the VT8235 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(doublewords) of line buffers from the PCI bus to the ISA
bus to further enhance overall system performance.
Figure . PC System Configuration Using the VT8233
CPU/CACHE
CA
CD
MA/COMMAND
MD
DIMM MODULE ID
SMB
VLINK
INTERFACE
USB 2.0 PORTS 0-5
KEYBOARD/MOUSE
PCI
IDE PRIMARY AND SECONDARY
AC97LINK
APIC
GPIO, POWER CONTROL RESET
MLL FAST ETHERNER INERFACE
RTC
CRYSTAL
BOOT ROM
LPC
SIDEBAND SIGNALS
Init A20M#
INTR/NMI
SMI/StopClk
FERR/IGNNE
Sleep
NORTH BRIGE
SYSTEM MEMORY
EXPANSION
CARDS
ONBOARD
LPCI/O
VT8235
487 BGA
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