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GE Manuals
Single board computers
CM6
Hardware reference manual
GE CM6 Hardware Reference Manual page 53
Single/dual core powerpc 3u compactpci sbc fourth edition
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GE
CM6
Hardware Reference Manual
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Interrupts
PCI Busses
SMBusses
GE Intelligent Platforms – CM6 Hardware Reference Manual, Fourth Edition
The MPC8641 has a bunch of external interrupts inputs. The list below shows
the usage in the CM6.
Interrupt
Name
MCP0
Not used
MCP1
Not used
SMI0
WDG/DEG/FAL
SMI1
Not used
IRQ0
INT_PHYA
IRQ1
INT_PHYB
IRQ2
INT_RTC
IRQ3
Not used
IRQ4
Not used
IRQ5
Not used
IRQ6
Not used
IRQ7
Not used
IRQ8
GPIO4
IRQ9
GPIO5
IRQ10
GPIO6
IRQ11
GPIO7
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)
IDSEL (B)
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.
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
Table 20: Interrupts
Comment
Watchdog or Power Supply System
Management Interrupt
Alert from Gigabit PhyA
Alert from Gigabit PhyB
RTC Interrupt
GPIO change interrupt
GPIO change interrupt
GPIO change interrupt
GPIO change interrupt
AD20
AD19
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