W89C841F Datasheet, PDF (43/102 Pages) Winbond – 3-IN - 1 10/100M FAST ETHERNET CONTROLLER

W89C841F/D
Fdc/FPMR0 Power Management Register 0
The register provides the power management capabilities of W89C841F.
BIT
31: 27
26
25
24:22
ATTRIBUTE
R
R
R
R
BIT NAME
PME_SP
D2SUP
D1SUP
Aux_
Current
DESCRIPTION
PME_Support
bit 31 = 1 --- PMEB can be asserted from D3(cold) state. The
value is dependent on the auxiliary power source detection
from pin BtOEB/AuxPWR after power-on reset.
bit 30 = 1 --- PMEB can be asserted from D3 (hot). Fixed to 1.
bit 29 = 0 --- PMEB cannot be asserted from D2. Fixed to 0.
bit 28 = 1 --- PMEB can be asserted from D1. Fixed to 1.
bit 27 = 1 --- PMEB can be asserted from D0. Fixed to 1.
D2_Support
Fixed to 0. W89C841F does not support D2 Power
Management State.
D1_Support
Fixed to 1. W89C841F supports D1 Power Management
State.
3.3V Auxiliary Current
This field reports the 3.3Vaux auxiliary current requirements
for PCI function. If PM_Data_En is disable and D3 cold is not
supported, Aux_Current are fixed to 000b. IF PM_Data_En is
disable and D3 cold is supported, Aux_Current bits apply:
Bit
3.3VAux
24 23
22
Max. Current Required
1
1
1
375 mA
1
1
0
320 mA
1
0
1
270 mA
1
0
0
220 mA
0
1
1
160 mA
0
1
0
100 mA
0
0
1
55 mA
0
0
0
0 (self powered)
If bit PM_Data_En loaded from EEPROM is enabled,
PM_Data field of Fe0/FPMR1 Is implemented to report the
power consumption and power dissipation of each device
state (D0, D1 and D3). So it takes precedence over 3.3Vaux
current requirement reporting. Aux_Current bits will be fixed
to 000b.
Note: The 3.3Vaux Max. auxiliary current of W89C841F is 220 mA which
should be loaded from EEPROM.
R
---
Fixed to 0.
- 43 -
Publication Release Date: October 18, 2001
Revision A3