參數(shù)資料
型號: IBM21P100BGC
元件分類: 總線控制器
英文描述: PCI BUS CONTROLLER, PBGA304
封裝: 31 X 31 MM, PLASTIC, BGA-304
文件頁數(shù): 59/144頁
文件大?。?/td> 5197K
代理商: IBM21P100BGC
IBM21P100BGC
IBM 133 PCI-X Bridge R2.0
ppb20_operations.fm.01
October 15, 2001
Bus Operation
Page 21 of 144
3. Bus Operation
This chapter presents a summary of the PCI and PCI-X transactions, transaction forwarding across the IBM
133 PCI-X Bridge R2.0, and transaction termination.
3.1 Types of Transactions
Table 3-1 and Table 3-2 list the command code and name for each PCI and PCI-X transaction. For each
transaction type, the middle two columns indicate whether the IBM 133 PCI-X Bridge R2.0 can initiate the
transaction as a master on the primary bus and on the secondary bus; the last two columns indicate whether
the bridge responds to the transaction as a target on the primary bus and on the secondary bus.
Table 3-1. PCI Transactions
Command
Code
Type of Transaction
Initiates as Master
Responds as Target
Primary
Secondary
Primary
Secondary
0000
Interrupt Acknowledge
No
0001
Special Cycle
Yes
No
0010
I/O Read
Yes
0011
I/O Write
Yes
0100
Reserved
No
0101
Reserved
No
0110
Memory Read
Yes
0111
Memory Write
Yes
1000
Reserved
No
1001
Reserved
No
1010
Configuration Read
No
Yes
Type 0
1011
Configuration Write
Type 1
Yes
1100
Memory Read Multiple
Yes
1101
Dual Address Cycle
Yes
1110
Memory Read Line
Yes
1111
Memory Write and Invalidate
Yes
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