Product specifications

VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -2- Product Features
x Concurrent PCI Bus Controller
− 33 MHz operation
− Supports up to six PCI masters
− Peer concurrency
− Concurrent multiple PCI master transactions; i.e., allow PCI masters from both PCI buses active at the same time
− Zero wait state PCI master and slave burst transfer rate
− PCI to system memory data streaming up to 132Mbyte/sec (data sent to north bridge via high speed V-Link
Interface)
− PCI master snoop ahead and snoop filtering
− Eight DW of CPU to PCI posted write buffers
− Byte merging in the write buffers to reduce the number of PCI cycles and to create further PCI bursting possibilities
− Enhanced PCI command optimization (MRL, MRM, MWI, etc.)
− Four lines of post write buffers from PCI masters to DRAM
− Sixteen levels (double-words) of prefetch buffers from DRAM for access by PCI masters
− Delay transaction from PCI master accessing DRAM
− Transaction timer for fair arbitration between PCI masters (granularity of two PCI clocks)
− Symmetric arbitration between Host/PCI bus for optimized system performance
− Complete steerable PCI interrupts
− PCI-2.2 compliant, 32 bit 3.3V PCI interface with 5V tolerant inputs
x Fast Ethernet Controller
− High performance PCI master interface with scatter / gather and bursting capability
− Standard MII interface to external PHYceiver
− 1 / 10 / 100 MHz full and half duplex operation
− Independent 2K byte FIFOs for receive and transmit
− Flexible dynamically loadable EEPROM algorithm
− Physical, Broadcast, and Multicast address filtering using hashing function
− Magic packet and wake-on-address filtering
− Software controllable power down
x UltraDMA-133 / 100 / 66 / 33 Master Mode EIDE Controller
−
Dual channel master mode hard disk controller supporting four Enhanced IDE devices
− Transfer rate up to 133MB/sec to cover PIO mode 4, multi-word DMA mode 2 drives, and UltraDMA-133 interface
− Increased reliability using UltraDMA-133/100/66 transfer protocols
− Thirty-two levels (doublewords) of prefetch and write buffers
− Dual DMA engine for concurrent dual channel operation
− Bus master programming interface for SFF-8038i rev.1.0 and Windows-95 compliant
− Full scatter gather capability
− Support ATAPI compliant devices including DVD devices
− Support PCI native and ATA compatibility modes
− Complete software driver support
x Direct Sound Ready AC97 Digital Audio Controller
− AC-Link access to 4 CODECs (AC97 + AMC97 + MC97)
− Multichannel Audio
− Bus Master Scatter / Gather DMA
− Dedicated read and write channels supporting simultaneous stereo playback and record
− Dedicated read and write channels supporting simultaneous modem receive and transmit
− 1 stereo DirectSound channel with source / volume control / mixer
− 1 shared FM / SPDIF PCM read channel
− 1 dedicated channel supporting multi-channel audio
− 32-byte line-bufers for each SGD channel
− Programmable 8bit / 16bit mono / stereo PCM data format support
− AC97 2.1 compliant