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參數(shù)資料
| 型號(hào)： | 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)： | 131/144頁 |
| 文件大小： | 5197K |
| 代理商： | IBM21P100BGC |
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IBM21P100BGC
IBM 133 PCI-X Bridge R2.0
ppb20_pcix_regs.fm.01
October 15, 2001
Configuration Registers
Page 87 of 144
17
RO
133 MHz Capable
This bit is read-only and is a b‘1’ indicating that this bridge is capable of 133 MHz operation on the primary
interface.
16
RO
64-bit Device
This bit is read-only and is a b‘1’ indicating that the width of the bridge’s primary AD interface is 64 bits.
15:8
RO
Bus Number
These bits are read for diagnostic purposes only. It is an additional address from which the contents of the pri-
mary bus number register in the Type x‘01’ configuration space header is read.
The bridge uses the bus number, device number, and function number fields to create the completer ID when
responding with a split completion to a read of and internal bridge register. These fields are also used for cases
when one interface is in conventional mode and the other is in the PCI-X mode.
7:3
RO
Device Number
These bits are read for diagnostic purposes only. They indicate the number of this device, which is the number
in the device number field (AD[15:11]) of the address of a Type 0 configuration transaction that is assigned to
this bridge by the connection of the system hardware. The bridge uses this number as described for the bus
number field above.
Each time the bridge is addressed by a configuration write transaction, the bridge updates this register with the
contents of AD[15:11] of the address phase of the configuration write, regardless of which register in the bridge
is addressed by the transaction. The bridge is addressed by a configuration write transaction if all of the follow-
ing are true:
The transaction uses a configuration write command.
IDSEL is asserted during the address phase.
AD[1:0] are b‘00’ (Type 0 configuration transaction).
AD[10:08] of the configuration address contain the appropriate function number.
State after RST# is x‘1F’.
2:0
RO
Function Number
These bits are read for diagnostic purposes only. They indicate the number of this function, which is the num-
ber in the function number field (AD[10:08]) of the address of a Type 0 configuration transaction to which this
bridge responds. The bridge uses this number as described for the bus number field above.
State after RST# is b‘000’.
Bit(s)
Access
Field Name and Description
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