User guide

7
PCI Host Bridge
The 21071-DA chip is the bridge between the PCI local bus and the system bus,
as shown in Figure 7–1.
Figure 7–1 PCI Host Bridge
PCI Host
Bridge
(21071-DA)
EpiData bus 32 Bits
ML013280
PCI BUS 32 Bits
As a PCI host bridge, the 21071-DA chip contains all control functions of the
bridge and some data path functions.
Figure 7–2 shows a block diagram of the 21071-DA chip.
PCI Host Bridge 7–1