GE CM6, Hardware Reference Manual

Page: 52 / 88

Status Input Ports
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.
Table 17: ETSEC1
Port Name Read Default
ETSEC1_RXD[4:0] GA[4:0] Geographical Address
connected to the GA pins of
the cPCI connector -
ETSEC1_RXD5 PCI_PRESENT 0 – CPCI backplane is
present
1 – CPCI backplane is not
present
-
ETSEC1_RXD6 PMC_PRESENT 0 – PMC card is present at
the slot
1 – PMC card is not present
at the slot -
ETSEC1_RXD7 reserved - -
Table 18: ETSEC2
Port Name Read Default
ETSEC2_RXD0 EREADY 0 – PMC card is busy with
internal enumeration of the
PCI bus
1 – PMC has finished PCI
enumeration and is ready for
access -
ETSEC2_RXD1 FLASH_BUSY 0 – Flash devices are busy
with a current program or
erase command
1 – Flash devices are ready
to accept commands -
ETSEC2_RXD[7:2] Reserved - -
General Purpose I/O Port
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
Table 19: GPIO
Name Write/Read Default
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
GE Intelligent Platforms – CM6 Hardware Reference Manual, Fourth Edition Page 51