參數(shù)資料
型號(hào)： UCB1500
廠商： NXP SEMICONDUCTORS
元件分類： 總線控制器
英文描述： PCI to AC97 bridge/host controller
中文描述： PCI BUS CONTROLLER, PQFP80
封裝： 12 X 12 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-315-1, LQFP-80
文件頁(yè)數(shù)： 12/58頁(yè)
文件大小： 1001K
代理商： UCB1500
Philips Semiconductors
UCB1500
PCI to AC97 bridge/host controller
Objective specification
Rev. 01 — 4 February 2000
12 of 58
9397 750 06854
Philips Electronics N.V. 2000. All rights reserved.
[84]: Power Management Control/Status:
(V
AUX
powered:
Only
PME Status and
PME_EN are sticky.)
[86-87]: Reserved.
Table 13: Power Management Control/Status register bit description
Bit
Description
15
PME Status - Sticky Bit
This bit is set when the function would normally assert the PME signal
independent of the state of the PME_EN bit. This bit is set when a power
management event occurs.
Writing a ‘1’ to this bit will clear it and cause the function to stop asserting a PME
(if enabled). Writing a ‘0’ has no effect.
14-13(r)
Data scale
Not implemented.
12-9
Data select
This 4-bit field is used to select which data is to be reported through the Data
register and
Data scale
field. This function is not implemented in this chip.
8
PME_EN - Sticky Bit
A ‘1’ enables the function to assert PME. When ‘0’, PME assertion is disabled.
7-2(r)
Reserved.
1-0
Power State
This 2-bit field is used both to determine the current power state of a function
and to set the function into a new power state. The definition of the field values is
given below.
00b - D0
01b - D1
10b - D2
11b - D3hot
If software writes D1 or D2 and the corresponding bit 10 or 9 or register 82
indicates it is not supported, the state change is discarded.
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