ucb1500 NXP Semiconductors, ucb1500 Datasheet - Page 12

• Manufacturer Part Number: ucb1500
• Description: Pci To Ac97 Bridge/host Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 07443
Product specification
[84]: Power Management Control/Status:
PME_EN are sticky.)
Table 13: Power Management Control/Status register bit description
[86-87]: Reserved.
Bit
15
14-13(r)
12-9
8
7-2(r)
1-0
Description
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.
Data scale
Not implemented.
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.
PME_EN - Sticky Bit
A ‘1’ enables the function to assert PME. When ‘0’, PME assertion is disabled.
Reserved.
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.
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.
00b - D0
01b - D1
10b - D2
11b - D3hot
Rev. 03 — 7 July 2000
(V
AUX
PCI to AC97 bridge/host controller
powered: Only PME Status and
© Philips Electronics N.V. 2000. All rights reserved.
UCB1500
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