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TA64 Hardware Manual
3-2
Themis Computer
3.1.2
HyperTransport Technology
The AMD 8000 HyperTransport core-logic chipset series was designed to enhance
high-speed AMD processors—including the Turion64—and includes the AMD
8131 HyperTransport PCI-X Tunnel and the AMD 8111 HyperTransport I/O Hub.
3.1.2.1 AMD 8131 HyperTransport PCI-X Tunnel
The AMD 8131 HyperTransport PCI-X Tunnel is a high-speed device that provides
two independent, high-performance PCI-X bus bridges that are integrated with a
high-speed HyperTransport technology tunnel. Tunnelling provides the capability to
connect with other HyperTransport technology devices that are downstream (see
Figure 3-1
); namely, the AMD 8111 (see next section) in the TA64.
Major features of the AMD 8131 include the following:
• 16-bit HyperTransport interface (Side A) with a 6.4-GB/s maximum bandwidth.
• 8-bit HyperTransport interface (Side B) with a 3.2-GB/s maximum bandwidth.
• Two PCI-X bridges (Bridge A, Bridge B) that support the following features:
—PCI-X modes and legacy PCI revision 2.2 modes
—133-MHz, 100-MHz, 66-MHz, and 33-MHz transfer rates in PCI-X mode
—66-MHz and 33-MHz PCI 2.2 modes
—Independent transfer rates and operational modes for each bridge
—Support for up to five PCI masters on each bridge
Figure 3-1.
AMD 8131 HyperTransport PCI-X Tunnel
AMD 8131 HyperTransport
PCI-X Tunnel
Turion64
AMD 8111
TM
TM
Tunnel
16-bits Upstream
16-bits Downstream
8-bits Upstream
200 MHz
800 MHz
8-bits Downstream
Side B
Side A
PCI-X
Bridge A
PCI-X
Bridge B
HyperTransport Link
HyperTransport Link
Host
Downstream
Device
PCI-X Bus A
PCI-X Bus B
Содержание TA64
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