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): 137/144頁
文件大?。?/td> 5197K
代理商: IBM21P100BGC
IBM21P100BGC
IBM 133 PCI-X Bridge R2.0
Configuration Registers
Page 92 of 144
ppb20_pcix_regs.fm.01
October 15, 2001
5.2.5.26 Power Management Control/Status Register
This register reports status information about the secondary interface.
Address Offset
x‘94’
Access
See bit descriptions
Reset Value
x‘0000’
PM
E
S
ta
tu
s
Da
ta
S
c
a
le
Da
ta
S
e
le
c
t
PM
E
n
a
b
le
Re
s
e
rv
e
d
Po
w
e
r
S
ta
te
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Bit(s)
Access
Field Name and Description
15
RO
PME Status
Forced to b‘0’ to indicate that this device does not support the PME# pin.
14:13
RO
Data Scale
Forced to b‘00’ to indicate that this device does not implement the Data register.
12:9
RO
Data Select
Forced to b‘0000’ to indicate that this device does not implement the Data register.
8
RO
PME Enable
Forced to b‘0’ to indicate that this device does not support PME# generation.
7:2
RO
Reserved.
1:0
RW
Power State
This 2-bit field is used to both determine and reflect the current power state of the device. If an un-implemented
power state is written to this register, the bridge completes the write transaction, ignores the write data, and
does not change the value of this field. Writing a value of D0 when the previous state was D3 will cause a
device reset to occur (without activating the secondary RST#).
00
D0
01
D1 (not implemented)
10
D2 (not implemented)
11
D3
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