HP Workstation x2000 hp workstation x2000 - Technical Reference and Troublesho - Page 55

System Board The Input/Output Controller Hub 2 (82801BA) The following table shows the available ICH2 features, and the following sections discuss them. Feature Feature • Multifunction PCI bus interface: - PCI at 32-bit 33MHz - PCI 2.2 specification - 133MB/sec data transfer rate - Master PCI device support for as many as five devices • Enhanced DMA controller: - Two 82C37 DMA controllers - PCI DMA with two PC/PCI channels in pairs - LPC DMA - DMA collection buffer to provide Type-F DMA performance for all DMA channels • USB, supporting: - USB 1.1 compliant - UHCI implementation with four USB ports for serial transfers at 1.2 or 1.5Mbit/sec - Wake-up from sleeping states - Legacy keyboard/mouse software • Interrupt Controller: - Two cascaded 82C59 controllers - Integrated I/O APIC capability - 15 interrupt support in 8259 mode, 24 supported in I/O APIC mode - Serial interrupt protocol • Power Management Logic: - ACPI 1.0 compliant - Support for APM-based legacy power management for non-ACPI implementations - ACPI defined power states (S1, S3, S4, S5) - ACPI power management timer - SMI generation - All registers readable/restorable for proper resume from 0V suspend states - PCI PME# • Integrated IDE controller: - Independent timing of as many as four drives - Ultra ATA/100 mode (100MB/sec) - Ultra ATA/66 mode (66MB/sec) - Ultra ATA/33 mode (33MB/sec) - PIO mode four transfers as fast as 14MB/sec - Separate IDE connections for primary and secondary cables - Integrated 16 x 32-bit buffer for IDE PCI burst transfers - Write ping-pong buffer for faster write performances • Real-time clock, supporting: - 256-byte battery-backed CMOS RAM - Hardware implementation to indicate century rollover • System TCO reduction circuits: - Timers to generate SMI# and reset upon - Timers to detect improper processor reset - Integrated processor frequency strap logic Chapter 2 55