21150
.
Figure 3. 21150 on the System Board
Secondary Data
Secondary Control
Secondary Data
Secondary
Arbiter
Secondary
Arbiter
Primary
and
Primary-
to-
Secondary
Control
Secondary
Data Path
Configuration
Registers
Clocks and
Reset
Secondary-
to-
Primary
Data Path
Primary
Request
and Grant
85%
Primary Data
Primary Control
Primary Data
LJ-04633.AI4
Table 1. 21150 Functional Blocks (Sheet 1 of 2)
Function Blocks
Description
PCI interface control logic. This block contains state
machines and control logic for the primary target interface,
the primary master interface, the secondary target
interface, and the secondary master interface. This block
also contains logic that interfaces to the data path and the
configuration block
Primary and Secondary Control
Primary-to-Secondary Data Path
Data path for data received on the primary interface and
driven on the secondary interface. This block is used for
write transactions initiated on the primary PCI bus and for
returning read data for read transactions initiated on the
secondary PCI bus. This block contains logic to store and,
for posted write transactions, to increment the address of
the current transaction. This block also performs bus
command and configuration address format translations.
4
Preliminary Datasheet
INTEL [ INTEL ]
