82371EB PIIX4E Chip
      Show Part Numbers

The Intel 440BX PCIset includes a Host-PCI bridge integrated with both an optimized Dynamic Random Access Memory (DRAM) controller and an Accelerated Graphics Port (AGP) interface. The input/output (I/O) subsystem of the 440BX is based on the PIIX4E, which is a highly integrated PCI-ISA/IDE Accelerator Bridge. This chip set consists of the Intel 82443BX PCI/AGP Controller (PAC) and the Intel 82371EB PCI/ISA IDE Xccelerator (PIIX4E) Bridge chip.

82371EB PIIX4E chipThe 82371EB PCI/ISA IDE Xccelerator (PIIX4E) bridge chip is a multifunction PCI device implementing the PCI to ISA bridge, PCI IDE functionality, Universal Serial Bus (USB) host/hub functionality, and enhanced power management. The PIIX4E features:

  • Multifunction PCI to ISA Bridge
    • Supports the PCI bus at 33 megahetz (MHz)
    • Complies with PCI specification 2.1
    • Full ISA bus support
  • USB Controller
  • Integrated Dual-Channel Enhanced Integrated Device Electronics (IDE) Interface
    • Supports up to four IDE devices
    • Programmed I/O (PIO) Mode 4 transfers at up to 16 MBps
    • Supports Ultra direct memory access (DMA)/33 synchronous DMA mode transfers up to 33 MBps
    • Bus master mode with an 8 ´ 32-bit buffer for bus master PCI IDE burst transfers
  • Enhanced DMA Controller
    • Two 8237-based DMA controllers
    • Supports PCI DMA with three PC/PCI channels and distributed DMA protocols
    • Fast type-F DMA for reduced PCI bus usage
  • Interrupt Controller Based On 82C59
    • Supports 15 interrupts
    • Programmable for edge/level sensitivity
  • Power Management Logic
    • Sleep/resume logic
    • Supports Wake On Modem, Wake On local area network (LAN) and Wake On power management event (PME)
    • Support for ACPI
  • Real-Time Clock
    • 256 byte battery-backed complementary metal-oxide semiconductor (CMOS) static RAM (SRAM)
    • Includes date alarm
  • 16-bit Counters/Timers Based On 82C54