Interrupts
The MPC8641 has a bunch of external interrupts inputs. The list below shows
the usage in the CM6.
Table 20: Interrupts
Interrupt Name
Comment
MCP0 Not
used
MCP1 Not
used
SMI0
WDG/DEG/FAL
Watchdog or Power Supply System
Management Interrupt
SMI1 Not
used
IRQ0
INT_PHYA
Alert from Gigabit PhyA
IRQ1
INT_PHYB
Alert from Gigabit PhyB
IRQ2 INT_RTC
RTC
Interrupt
IRQ3 Not
used
IRQ4 Not
used
IRQ5 Not
used
IRQ6 Not
used
IRQ7 Not
used
IRQ8
GPIO4
GPIO change interrupt
IRQ9
GPIO5
GPIO change interrupt
IRQ10
GPIO6
GPIO change interrupt
IRQ11
GPIO7
GPIO change interrupt
PCI Busses
The MPC8641 provides two PCI-Express channels. Each of the both channels
is connected to a PCIe/PCI bridge.
PCIe channel one is four lane wide and provides with a Pi7C9X130 bridge the
64bit/66MHz PCI for the PMC slot.
PMC: IDSEL (A)
AD20
IDSEL (B)
AD19
PCIe channel two is one line wide and provides with the Pi7C9X110 bridge the
32bit/66MHz PCI bus for the cPCI compliant backplane. This bridge is a
universal transparent/non-transparent bridge to support the CM6 as system slot
controller or non-system (peripheral) slot controller function.
SMBusses
The MPC8641 supports two System Management Buses (SMB).
SMBus 1
Bus one is connected to a nonvolatile digital switch device for selecting
different power-on reset configurations. Following devices and address scheme
are used.
Address:
1010 111x
nonvolatile digital switch DS3905
GE Intelligent Platforms – CM6 Hardware Reference Manual, Fourth Edition
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Summary of Contents for CM6
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