DM562AP
V.90 Integrated Data/ Fax/Voice/Speakerphone
Modem Device Single Chip with Memory Built in
32
Preliminary
Version: DM562AP-DS-P02
March 05, 2004
Power Management Control/Status(Xxxxxx54h~PMCSR)
0
R/W
R/W
R/W
0
0
0
0
0
0
0
000
0
0
1
2
15
8
7
9
14
PMCSR
Offset=54H
Bit
Default
Type
Description
31:16
0000h
RO
Reserved
15
0
R/C
_WR
PME_Status
This bit is set when the function would normally assert the PME# signal
independent of the state of the PME_En bit. Writing a “1” to this bit will
clear it.
This bit defaults to “0” if the function does not support PME# generation
from D3(cold).
If the function supports PME# from D3(cold) then this bit is sticky and
must be explicitly cleared by the operating system each time the
operating system is initially loaded.
14:9
000000
RO
Reserved.
It means that the DM6588A does not support reporting power
consumption.
80
RW
_WR
PME_En
Write “1” to enables the function to assert PME#, write “0” to disable
PME# assertion.
This bit defaults to “0” if the function does not support PME# generation
from D3(cold).
If the function supports PME# from D3(cold) then this bit is sticky and
must be explicitly cleared by the operating system each time the
operating system is initially loaded.
7:2
000000
RO
Reserved
1:0
00
RW
_WR
_RD
Power State.
This two bits field is both used to determine the current power state of a
function and to set the function into a new power state. The definitionis
given below.
00 : D0
11 : D3(hot)
PCI function power management state
The DM6588A supports PCI function power states D0,
D3(hot), D3(cold). Additional PCI signal PME# to pin
A19 of the standard PCI connector.
PME Context
PME (power Management Event) context is defined
as the functional state information and logic required
to generate power management events(PMEs), report
PME status, and enable PMEs.
For MODEM, PME context consists of PME_En bit,
PME_Status bit , Ring Detect ,and Ring to PME
circuit.
PCI MODEM Power Management Operation
During a true power-on situation (no auxiliary and
normal power), PME_En = 0 to avoid to assert PME#.
When assert RST#, the pci configuration space is set
to default value except PME context which must
preserve.
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
