Pci 64-Bit 66 Mhz Bus Interface - HP Kayak XU800 Technical Reference Manual

Feature
PCI Interface:
•
Both 64-bit and 32-bit 33 MHz or 66 MHz devices.
Provides Synchronous operation to the P64H using
1:1(66 MHz) or 2:1 (33 MHz) hub interface/PCI bus gearing
ratio.
Allows input/output operations to occur with processor
transactions to isolate traffic.
Parity and System Error (PERR
Allows peer-to-peer communication within a single PCI bus
segment.
Provides PCI transaction forwarding for all I/O and memory
(Type 1-to-Type 1, Type 1-to-Type 0, Type 1 to a special
cycle).
Provides address decoding for:
16-bit I/O addressing.
32-bit memory mapped I/O addressing.
44-bit prefetchable memory addressing (upstream only).
VGA addressing.
Includes downstream LOCK capabilities.
Fast Back-to-Back cycles (upstream only).
Bus parking.
Implements Delayed Transaction for;
PCI configuration read/written I/O read, and memory read
commands (downstream).
Memory read, I/O read and I/O write commands (upstream).
The following table shows the available P64H features.
PERR

PCI 64-bit 66 MHz Bus Interface

The P64H provides the interface to a PCI 64-bit 66 MHz bus interface
supporting both 64-bit and 32-bit 33 MHz or 66 MHz devices.
This interface implementation is compliant with PCI Rev 2.2 Specification,
and it can support up to 533 MB/sec data transfer rates.
It also supports PCI master capabilities and the Adaptec AIC 7892
16-bit Ultra 160 SCSI controller.
A table on page 68 shows the P64H interrupts.
Feature
Scalability / Flexibility:
•
Provides arbitration support for all PCI devices.
Supports 2 x 66 MHz PCI slots.
Processes dual address cycle (DAC) for upstream access
>4 GB.
Handles 3.3 V operation with 5.0 V tolerant on all input pins.
Upstream Hub Link 16 Interface:
•
Connects to the MCH via a 16-bit hub interface.
Provides 64-bit and 32-bit addressing.
Utilizes 66 MHz base clock.
Utilizes 133 MHz double-clocked strobes.
Integrated Functions:
•
I/O APIC to provide 24 interrupts.
Six copies of PCLKOUT signals to its PCI devices.
2 System Board
PCI 64-bit Hub
45