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AMD-8131™ HyperTransport™ PCI-X Tunnel
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AMD introduces the AMD-8131™ HyperTransport™ PCI-X
tunnel. This high-speed device provides two independent, high-performance
PCI-X bus bridges, integrated with a high-speed HyperTransport technology
tunnel. The tunnel function provides connection capability to other downstream
HyperTransport technology devices, allowing greater system flexibility.
As shown in Figure 1, the front-end HyperTransport interface (Side A) provides
a configurable 16-bit wide communication path to the host, offering up to
6.4GB/s of bandwidth. Similarly, the back-end HyperTransport interface (Side
B) provides a configurable 8-bit wide communication path to a downstream
device, offering up to 3.2GB/s of bandwidth. |
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Figure 1: AMD-8131™ HyperTransport™ PCI-X tunnel
Features
Component features are as follows:
- 16-bit HyperTransport interface (Side A) offering a maximum bandwidth
of up to 6.4GB/s
- 8-bit HyperTransport interface (Side B) offering a maximum bandwidth
of up to 3.2GB/s
- Two PCI-X bridges (Bridge A and Bridge B) supporting the following
features:
- PCI-X modes and legacy PCI revision 2.2 modes
- 133MHz, 100MHz, 66MHz, and 33MHz transfer rates in PCI-X mode
- 66MHz and 33MHz PCI 2.2 modes
- Independent transfer rates and operational modes for each bridge
- Each bridge includes support for up to five PCI masters
- Each bridge includes an IOAPIC with four redirection registers
- legacy interrupt controller and IOAPIC modes supported
- SHPC-compliant hot plug controller and support
- 829-pin OBGA package
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