Motorola MVME2300 Series 用户手册

Raven Registers

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2-45

START

Start Address. Determines the start address of a
particular memory area on the MPC bus which will be
used to access PCI bus resources. The value of this field
will be compared with the upper 16 bits of the incoming
MPC address.

END

End Address. Determines the end address of a particular
memory area on the MPC bus which will be used to access
PCI bus resources. The value of this field will be
compared with the upper 16 bits of the incoming MPC
address.

MPC Slave Offset/Attribute (0,1 and 2) Registers

MSOFFx

MPC Slave Offset. A 16-bit offset that is added to the
upper 16 bits of the MPC address to determine the PCI
address used for transfers from the MPC bus to PCI. This
offset allows PCI resources to reside at addresses that
would not normally be visible from the MPC bus.

REN

Read Enable. If set, the corresponding MPC slave is
enabled for read transactions.

WEN

Write Enable. If set, the corresponding MPC slave is
enabled for write transactions.

Address

MSOFF0/MSATT0 - $FEFF0044

MSOFF1/MSATT1 - $FEFF004C

MSOFF2/MSATT2 - $FEFF0054

Bit

0 1 2 3 4 5 6 7 8 9

1
0

1
1

1
2

1
3

1
4

1
5

1
6

1
7

1
8

1
9

2
0

2
1

2
2

2
3

2
4

2
5

2
6

2
7

2
8

2
9

3
0

3
1

Name

MSOFFx

MSATTx

REN

WEN

WPE

MEM

IOM

Operation

R/W

R/
W

Reset

$0000

$00