Features: • Inter-operable with VIA and other Host-to-PCI Bridges − Combine with VT82C598 for a complete Super-7 (66 / 75 / 83 / 100MHz) AGP 2x system (Apollo MVP3) − Combine with VT8501 for a complete Super-7 system with integrated 2D / 3D graphics (Apollo MVP4) − Combine ...

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SeekIC No. : 004543849 Detail

VT8231: Features: • Inter-operable with VIA and other Host-to-PCI Bridges − Combine with VT82C598 for a complete Super-7 (66 / 75 / 83 / 100MHz) AGP 2x system (Apollo MVP3) − Combine with ...

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Product Details



• Inter-operable with VIA and other Host-to-PCI Bridges
  − Combine with VT82C598 for a complete Super-7 (66 / 75 / 83 / 100MHz) AGP 2x system (Apollo MVP3)
  − Combine with VT8501 for a complete Super-7 system with integrated 2D / 3D graphics (Apollo MVP4)
  − Combine with VT82C694X for a complete 66 / 100 / 133 MHz Socket370 / Slot1 AGP 4x system (Apollo Pro133A)
  − Combine with VT8601 for a complete 66 / 100 / 133 MHz Socket370 / Slot1 system with integrated 2D /
     3D  graphics (Apollo ProMedia)
  − Inter-operable with Intel or other Host-to-PCI bridges for a complete PC99 compliant PCI / AGP / LPC system
• Integrated Peripheral Controllers
  − Integrated Fast Ethernet Controller with 1 / 10 / 100 Mbit capability
  − Integrated USB Controller with two root hub and four function ports
  − Dual channel UltraDMA-33 / 66 /100 master mode EIDE controller
  − AC-link interface for AC-97 audio codec and modem codec
  − HSP modem support
  − Interface for optional external modem DSP
  − Integrated SoundBlasterPro / DirectSound compatible digital audio controller
  − LPC interface for Low Pin Count interface to Super-I/O or ROM
• Integrated Legacy Functions
  − Integrated Keyboard Controller with PS2 mouse support
  − Integrated DS12885-style Real Time Clock with extended 256 byte CMOS RAM and Day/Month Alarm for ACPI
  − Integrated Bus Controller including DMA, timer, and interrupt controller
  − Serial IRQ for docking and non-docking applications
  − Flash EPROM, 32Mbit (4Mbyte) EPROM and combined BIOS support
  − Fast reset and Gate A20 operation
• Fast Ethernet Controller
  − High performance PCI master interface with scatter / gather and bursting capability
  − Standard MII interface to PHYceiver
  − 1 / 10 / 100 MHz full and half duplex operation
  − Transmit data buffer byte alignment for low CPU utilization
  − Separate 2K byte FIFOs for receive and transmit of full Ethernet packets
  − Flexible dynamically loadable EEPROM algorithm
  − Physical, Broadcast, and Multicast address filtering using hashing function
  − Flexible wakeup events: link status change, magic packet, unicast physical address match, predefined
     pattern match
  − Software controllable power down
• UltraDMA-33 / 66 / 100 Master Mode PCI EIDE Controller
  − Dual channel master mode PCI supporting four Enhanced IDE devices
  − Transfer rate up to 100MB/sec to cover up to PIO mode 4, multi-word DMA mode 2, and UltraDMA mode 5
  − Thirty-two levels (doublewords) of prefetch and write buffers per channel
  − Dual DMA engine for concurrent dual channel operation
  − Bus master programming interface for SFF-8038i rev.1.0 and Windows-95 / 98 / 2000 compliant
  − Full scatter gather capability
  − Support ATAPI compliant devices including DVD devices
  − Support PCI native and ATA compatibility modes
  − Complete software driver support
• Integrated Super IO Controller
  − Supports 2 serial ports, IR port, parallel port, and floppy disk controller functions
  − Two UARTs for Complete Serial Ports Programmable character lengths (5,6,7,8) Even, odd, stick or no parity
     bit generation and detection Programmable baud rate generator High speed baud rate (230Kbps, 460Kbps
     )   support Independent transmit/receiver FIFOs Modem Control Plug and play with 96 base IO address and 12
     IRQ options
  − Fast IR (FIR) port IrDA 1.0 SIR and IrDA 1.1 FIR compliant IR function through the second serial port Infrared-
     IrDA (HPSIR) and ASK (Amplitude Shift Keyed) IR
  − Multi-mode parallel port Standard mode, ECP and EPP support Dynamic and static switch between parallel
     port pinout and FDC pinout Plug and play with 192 base IO address, 12 IRQ and 4 DMA options
  − Floppy Disk Controller 16 bytes of FIFO Data rates up to 1Mbps Perpendicular recording driver support Two
     FDDs with drive swap support Plug and play with 48 base IO address, 12 IRQ and 4 DMA options
• SoundBlaster Pro Hardware and Direct Sound Ready AC97 Digital Audio Controller
   − Up to six concurrent AC97 output channels for six-speaker surround sound experience
   − Multiple Direct Sound channels between system memory and AC97 link 10 Direct Sound output channels 4
      Direct Sound input channels 8-channel hardware sample-rate-converter / mixer 1 Surround Sound channel of
      up to six data streams
   − PCI bus master interface with scatter / gather and bursting capability
   − 32 byte FIFO for each direct sound channel
   − Host based wave table synthesis
   − Standard v1.03 or v2.1 AC97 Codec interface with up to four AC97 codec's from multiple vendors
   − Loopback capability for re-directing mixed audio streams into USB and 1394 speakers
   − Hardware SoundBlaster Pro for legacy compatibility
   − Plug and play with 4 IRQ, 4 DMA, and 4 I/O space options for SoundBlaster Pro and MIDI hardware
   − Hardware assisted FM synthesis for legacy compatibility
   − Direct two game ports and one MIDI port interface
   − Complete software driver support for Windows-95 / 98 / 2000 and Windows-NT
• MC97 HSP Modem Controller
   − PCI bus master interface with scatter / gather and burst capability
   − Standard AC97 codec interface for MC or AMC codec
   − Wake on ring in APM or ACPI mode through AC97 link
   − Supported by most HSP modem vendors
• Universal Serial Bus Controller
   − USB v.1.1 and Intel Universal HCI v.1.1 compatible
   − Eighteen level (doublewords) data FIFO with full scatter and gather capability
   − Root hub and four function ports
   − Integrated physical layer transceivers with optional over-current detection status on USB inputs
   − Legacy keyboard and PS/2 mouse support
• System Management Bus Interface
   − One master / slave SMBus and one slave-only SMBus
   − Host interface for processor communications
   − Slave interface for external SMBus masters
• Voltage, Temperature, Fan Speed Monitor and Controller
   − Five universal input channels for voltage or temperature sensing
   − Two fan-speed monitoring channels
   − Input channel for thermal diode in Intel™ high speed Pentium II™ / Pentium III™ CPUs
   − Programmable control, status, monitor and alarm for flexible desktop management
   − External thermister or internal bandgap temperature sensing
   − Automatic clock throttling with integrated temperature sensing
   − Internal core VCC voltage sensing
   − Flexible external voltage sensing arrangement (any positive supply and battery)
• Sophisticated PC99-Compatible Mobile Power Management
   − Supports both ACPI (Advanced Configuration and Power Interface) and legacy (APM) power management
   − ACPI v1.0 Compliant
   − APM v1.2 Compliant
   − CPU clock throttling and clock stop control for complete ACPI C0 to C3 state support
   − PCI bus clock run, Power Management Enable (PME) control, and PCI/CPU clock generator stop control
   − Supports multiple system suspend types: power-on suspends with flexible CPU/PCI bus reset options, suspend
      to DRAM, and suspend to disk (soft-off), all with hardware automatic wake-up
   − Multiple suspend power plane controls and suspend status indicators
   − One idle timer, one peripheral timer and one general purpose timer, plus 24/32-bit ACPI compliant timer
   − Normal, doze, sleep, suspend and conserve modes
   − Global and local device power control
   − System event monitoring with two event classes
   − Primary and secondary interrupt differentiation for individual channels
   − Dedicated input pins for power and sleep buttons, external modem ring indicator, and notebook lid open/close
      for system wake-up
   − Multiple internal and external SMI sources for flexible power management models
   − One programmable chip select and one microcontroller chip select
   − Enhanced integrated real time clock (RTC) with date alarm, month alarm, and century field
   − Thermal alarm on either external or any combination of three internal temperature sensing circuits
   − Hot docking support
   − I/O pad leakage control
• Plug and Play Controller
   − PCI interrupts steerable to any interrupt channel
   − Steerable interrupts for integrated peripheral controllers: USB, floppy, serial, parallel, audio, soundblaster, MIDI
   − Steerable DMA channels for integrated floppy, parallel, and soundblaster pro controllers
   − One additional steerable interrupt channel for on-board plug and play devices
   − Microsoft Windows 2000TM, Windows 98SETM, Windows 98TM, Windows NTTM, Windows 95TM and plug and
      play BIOS compliant
• Built-in NAND-tree pin scan test capability
• 0.30um, 3.3V, low power CMOS process
• Single chip 27x27 mm, 376 pin BGA


  Connection Diagram


Storage temperature
Operating temperature - Case
Operating temperature - Ambient
Reference Voltage
Core Voltage
Suspend Voltage
VCC + 0.3
USB Voltage
VCC + 0.3
Hardware Monitor Voltage
VCC + 0.3
LAN MII Voltage
VCC + 0.3
LAN RAM Voltage
VCC + 0.3
PLL Voltage
VCC + 0.3
Battery Voltage
VCC + 0.3
Input voltage (3.3V only inputs)
VCC + 0.3
Input voltage (5V tolerant inputs)
VREF + 0.5
All other inputs

Note: Stress above the conditions listed may cause permanent damage to the device. Functional operation of
          this device should be restricted to the conditions described under operating conditions.


The VT8231 South Bridge is a high integration, high performance, power-efficient, and high compatibility device that supports Intel, AMD, and VIA / Cyrix based processor to PCI bus bridge functionality to make a complete Microsoft PC99-compliant PCI / LPC system. The VT8231 includes standard intelligent peripheral controllers:

a) Master mode enhanced IDE controller with dual channel DMA engine and interlaced dual channel
    commands. Dedicated FIFO coupled with scatter and gather master mode operation allows high
    performance transfers between PCI and IDE devices. In addition to standard PIO and DMA mode operation,
    the VT8231 also supports the UltraDMA-33, 66, and 100 standards to allow reliable data transfer rates up to
   100 MB/sec throughput. The IDE controller is SFF-8038i v1.0 and Microsoft Windows-family compliant.
b) Integrated LAN Fast Ethernet controller (MAC) with Media Independent Interface (MII) to external PHY. The
    LAN controller operates at 1 / 10 / 100 Mbit/sec transfer rates using either full and half duplex operation and
    has separate 2Kbyte FIFOs for receive and transmit of full ethernet packets. The internal high-performance
    PCI interface has scatter / gather and bursting capability and can align bytes in the transmit data buffer to
    reduce CPU utilization. The LAN interface can perform address filtering on physical, broadcast, and 
    multicast  packets. The interface can also be configured for system wake up on link status change, receipt of
    magic packet, unicast physical address match on incoming packets, and predefined pattern match in the
    incoming data.
c) LPC (Low Pin Count) interface for BIOS ROM plus optional conventional BIOS ROM support
d) Universal Serial Bus controller that is USB v1.1 and Universal HCI v1.1 compliant. The VT8231 includes the root 
    hub with four function ports with integrated physical layer transceivers. The USB controller allows hot plug and
    play and isochronous peripherals to be inserted into the system with universal driver support. The controller
    also implements legacy keyboard and mouse support so that legacy software can run transparently in a non-
    USB-aware operating system environment.
e) Keyboard controller with PS2 mouse support
f) Real Time Clock with 256 byte extended CMOS. In addition to standard RTC functionality, the integrated RTC
   also includes the date alarm, century field, and other enhancements for compatibility with the ACPI standard.
g) Notebook-class power management functionality compliant with ACPI and legacy APM requirements. Multiple
    sleep states (power-on suspend, suspend-to-DRAM, and suspend-to-Disk) are supported with hardware
    automatic wake-up. Additional functionality includes event monitoring, CPU clock throttling and stop
    (Intelprocessor protocol), PCI bus clock stop control, modular power, clock and leakage control, hardware-
    based and software-based event handling, general purpose I/O, chip select and external SMI.
h) Hardware monitoring subsystem for managing system / motherboard voltage levels, temperatures, and fan speeds
i) Full System Management Bus (SMBus) interface with one master / slave port and one slave-only port
j) 16550-compatible serial I/O port with "Fast-IR" infrared communications port option. k) Integrated PCI-
    mastering dual full-duplex direct-sound AC97-link-compatible sound system. Hardware soundblaster-pro
   and  hardware-assisted FM blocks are included for Windows DOS box and real-mode DOS compatibility. Loopback
   capability is also implemented for directing mixed audio streams into USB and 1394 speakers for high quality 
   digital audio.
l) Game port and MIDI port
m) Standard floppy disk drive interface
n) ECP/EPP-capable parallel port with floppy disk controller pinout option
o) Serial IRQ for docking and non-docking applications
p) Plug and Play controller that allows complete steerability of all PCI interrupts and internal interrupts to
    any interrupt channel. One additional steerable interrupt channel is provided to allow plug and play
    and reconfigurability of on-board peripherals for Windows family compliance.

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