參數(shù)資料
型號： PCI1510ZVF
廠商： Texas Instruments, Inc.
英文描述： PC CARD CONTROLLERS
中文描述： PC卡控制器
文件頁數(shù)： 83/128頁
文件大?。?/td> 735K
代理商： PCI1510ZVF
423
4.39 Power-Management Control/Status Register Bridge Support Extensions
The power-management control/status register bridge support extensions support PCI bridge specific functionality.
See Table 415 for a complete description of the register contents.
Bit
7
6
5
4
3
2
1
0
Default
1
1
0
0
0
0
0
0
Register:
Offset:
Type:
Default:
Power-management control/status register bridge support extensions
A6h
Read-only
C0h
Table 415. Power-Management Control/Status Register Bridge Support Extensions Description
BIT
SIGNAL
TYPE
FUNCTION
7
BPCC_EN
R
BPCC_Enable. Bus power/clock control enable. This bit returns 1b when read.
This bit is encoded as:
0 = Bus power/clock control is disabled
1 = Bus power/clock control is enabled (default)
A 0b indicates that the bus power/clock control policies defined in the
PCI Bus Power Management
Interface Specification
are disabled. When the bus power/clock control enable mechanism is disabled,
the bridge power-management control/status register power state field (see Section 4.38, bits 10)
cannot be used by the system software to control the power or the clock of the bridge secondary bus. A
1b indicates that the bus power/clock control mechanism is enabled.
6
B2_B3
R
B2/B3 support for D3hot. The state of this bit determines the action that is to occur as a direct result of
programming the function to D3hot. This bit is only meaningful if bit 7 (BPCC_EN) is a 1b. This bit is
encoded as:
0 = When the bridge is programmed to D3hot, its secondary bus has its power removed (B3)
1 = When the bridge function is programmed to D3hot, its secondary bus PCI clock is
stopped (B2) (default)
50
RSVD
R
Reserved. Bits 50 return 000000b when read.
4.40 Power-Management Data Register
The power-management data register returns 00h when read, because the CardBus function does not report dynamic
data.
Bit
7
6
5
4
3
2
1
0
Default
0
0
0
0
0
0
0
0
Register:
Offset:
Type:
Default:
Power-management data
A7h
Read-only
00h
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