Specifications

11
• Power management functions
Support for system suspend/resume (DRAM and power-on suspend)
Compliant with ACPI power management
• SMBus support for desktop management functions
• Support for system management mode (SMM)
Intel 82371EB PCI ISA IDE Xcelerator (PIIX4E)
The PIIX4 is a multifunction PCI device implementing the PCI-to-ISA bridge, PCI IDE
functionality, Universal Serial Bus (USB) host/hub function, and enhanced power
management. The PIIX4E comes in a 324-pin package that features:
• Multifunction PCI-to-ISA bridge
Support for the PCI bus at 33 MHz
Complies with the PCI specification (see Section 6.2 for specification information)
Full ISA bus support
• USB controller
Two USB ports (see Section 6.2 for specification information)
Support for legacy keyboard and mouse
Support for UHCI interface (see Section 6.2 for specification information)
• Integrated dual-channel enhanced IDE interface
Support for up to four IDE devices
PIO Mode 4 transfers at up to 16 MB/sec
Support for Ultra DMA/33 synchronous DMA mode transfers up to 33 MB/sec
Bus master mode with an 8 x 32-bit buffer for bus master PCI IDE burst transfers
• Enhanced DMA controller
Two 8237-based DMA controllers
Support for PCI DMA with three PC/PCI channels and distributed DMA protocols
• Interrupt controller based on 82C59
Support for 15 interrupts
Programmable for edge/level sensitivity
• Power management logic
Sleep/resume logic
Support for wake-on-modem, Wake on LAN technology, and wake on PME
Support for ACPI (see Section 6.2 for specification information)
• Real-time Clock