2

Raven PCI Bridge ASIC

 

 

 

 

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 Address (3) Register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address

 

 

 

 

 

 

 

 

 

 

 

 

MSADD3 - $FEFF0058

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

 

 

 

 

 

 

 

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Name

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MSADD3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

START

 

 

 

 

 

 

 

 

 

 

 

 

 

 

END

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation

 

 

 

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset

 

 

 

 

 

 

$8000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$8080

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MSADD3, MSOFF3 and MSATT3 represent the only register group which can be used to initiate access to the PCI Configuration Address ($80000CF8) and Configuration Data ($80000CFC) registers. Note that this implies that MSxxx3 also represents the generation of PCI Special Cycles. The power-up default values of MSADD3, MSOFF3 and MSATT3 are set to allow access to PCI configuration space without MPC register initialization. For additional information, please refer to the description of the MSOFF3/MSATT3 registers under MPC Slave Offset/Attribute (3) Registers.

To initiate a PCI cycle from the MPC bus, the MPC address must be greater than or equal to the START field and less than or equal to the END field.

2-44

Computer Group Literature Center Web Site

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Image 114
Motorola MVME2300 Series manual Start, End, MPC Slave Address 3 Register, Address MSADD3 $FEFF0058 Bit Name