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Status Input Ports
General Purpose I/O Port
GE Intelligent Platforms – CM6 Hardware Reference Manual, Fourth Edition
Besides the registers in the CPLD the CM6 provides additional status
information at the input ports of the ETSEC1 and ETSEC2 ports of the
MPC8641.
The ETSEC1_RXD[7:0] and ETSEC2_RXD[7:0] ports are used as Input ports.
For programming see MCP8641 manual.
Port
Name
ETSEC1_RXD[4:0]
GA[4:0]
ETSEC1_RXD5
PCI_PRESENT
ETSEC1_RXD6
PMC_PRESENT
ETSEC1_RXD7
reserved
Port
Name
ETSEC2_RXD0
EREADY
ETSEC2_RXD1
FLASH_BUSY
ETSEC2_RXD[7:2]
Reserved
The CM6 uses the I/O Port of the PCI-PCIe Bridge Pericom Pi7C9X130 and
Pericom Pi7C9X110 for the general purpose I/Os which are optional available
at the rear. For programming see the manual of appropriate Pericom bridge
Name
Write/Read
GPIO[3:0]*
GPIO[3:0] are connected at the Pericom Bridge
PI7C9X130 GPIO[3:0]
GPIO[7:4]
GPIO[7:4] are connected at the Pericom Bridge
PI7C9X110 GPIO[3:0]
* GPIO[3:0] are not usable in board revision 1.x
Table 17: ETSEC1
Read
Geographical Address
connected to the GA pins of
the cPCI connector
0 – CPCI backplane is
present
1 – CPCI backplane is not
present
0 – PMC card is present at
the slot
1 – PMC card is not present
at the slot
-
Table 18: ETSEC2
Read
0 – PMC card is busy with
internal enumeration of the
PCI bus
1 – PMC has finished PCI
enumeration and is ready for
access
0 – Flash devices are busy
with a current program or
erase command
1 – Flash devices are ready
to accept commands
-
Table 19: GPIO
Default
-
-
-
-
Default
-
-
-
Default
-
-
Page 51
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