PCI system configurations
456
NS9750 Hardware Reference
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:
1These pins are not connected because internal resistors tie these pins to the appropriate state.

NS9750

REQ1#
REQ2#
REQ3#
GNT3#
GNT2#
GNT1#
PCI REQ INPCI GNT OUT
AD[31:0]
PCI BUS
Control
AD[11] IDSEL
INTB#,INTC#,
INTD#,INTA# PCI
INTERRUPTS
PCI CLK
OUT
PCI CLK
IN
SERR#
RST#
PCI_CENTRAL_RSC_n1
RTCK1