Motorola MVME6100 用户手册
PCI Configuration Space
2-13
2
Specification Revision 1.0b) at the rising edge of RST#. Onboard logic
will sense the states of PCIXCAP and M66EN for all devices on the bus
and select the appropriate mode and clock frequency. Software can access
the MV64360 Configuration Registers to determine the PCI mode and
clock frequency of PCI Bus 1 and PCI Bus 0. Refer to the MV64360 Data
Sheet, listed in
will sense the states of PCIXCAP and M66EN for all devices on the bus
and select the appropriate mode and clock frequency. Software can access
the MV64360 Configuration Registers to determine the PCI mode and
clock frequency of PCI Bus 1 and PCI Bus 0. Refer to the MV64360 Data
Sheet, listed in
, for details.
Voltage Input/Output (VIO) is selected on PCI Bus 1 by the position of the
PMC keying pins. Both sites should be set for the same VIO; that is, keyed
identically. If 5V VIO is selected, PCI Bus 1 reverts to PCI mode at 33
MHz.
PMC keying pins. Both sites should be set for the same VIO; that is, keyed
identically. If 5V VIO is selected, PCI Bus 1 reverts to PCI mode at 33
MHz.
PCI Configuration Space
The MV64360 controls all PCI configuration space access from either the
CPU or PCI busses. The IDSEL assignments for MVME6100 are shown
on the following table:
CPU or PCI busses. The IDSEL assignments for MVME6100 are shown
on the following table:
Table 2-6. IDSEL Mapping for PCI Devices
PCI Bus #
Device
Number Field
Number Field
PCI Address
Line
Line
IDSEL Connection
PCI Bus 0, PCI
Bus 1
Bus 1
0b1_0000
AD16
MV64360 ASIC
PCI Bus 0,0
0b1_0100
AD22
PCI6520
PCI Bus 0
0b1_0101
AD21
Tempe VME Bridge ASIC
PCI Bus 1
0b1_0100
AD20
PMC Slot 0 (SCSI controller also uses
IDSEL AD20)
IDSEL AD20)
PCI Bus 1
0b1_0101
AD21
PMC Slot 0, Secondary PCI Agent,
IPMC slot
IPMC slot
PCI Bus 1
0b1_0110
AD22
PMC Slot 1
PCI Bus 1
0b1_0111
AD23
PMC Slot 1, Secondary PCI Agent