Pci system configurations, Ns9750 – Digi NS9750 User Manual
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PCI system configurations
NS9750 can be connected to the PCI bus using an embedded (internal) or external PCI
bus arbiter. Figure 72 shows how NS9750 is connected to the PCI bus for a typical
system application using the embedded PCI bus arbiter, and where the NS9750
provides the central resource function (see "PCI central resource functions" on page
458). Up to three external masters are supported.
Figure 72: System connections to NS9750 — Internal arbiter and central resources
Note:
1
These pins are not connected because internal resistors tie these pins to the appropriate state.
NS9750
REQ1#
REQ2#
REQ3#
GNT3#
GNT2#
GNT1#
P
C
I R
E
Q IN
P
C
I GN
T
OU
T
AD[31:0]
PCI
B
U
S
Control
AD[11]
IDSEL
INTB#,INTC#,
INTD#,INTA#
PCI
INTERRUPTS
PCI CLK
OUT
PCI CLK
IN
SERR#
RST#
PCI_CENTRAL_RSC_n
1
RTCK
1