SMSC LAN9311 Manual De Usuario
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08)
46
SMSC LAN9311/LAN9311i
DATASHEET
4.3
Power Management
The LAN9311/LAN9311i Port 1 and Port 2 PHYs and the Host MAC support several power
management and wakeup features.
management and wakeup features.
The LAN9311/LAN9311i can be programmed to issue an external wake signal (PME) via several
methods, including wake on LAN, wake on link status change (energy detect), and magic packet
wakeup. The PME signal is ideal for triggering system power-up using remote Ethernet wakeup events.
A simplified diagram of the logic that controls the PME and PME_INT signals can be seen in
methods, including wake on LAN, wake on link status change (energy detect), and magic packet
wakeup. The PME signal is ideal for triggering system power-up using remote Ethernet wakeup events.
A simplified diagram of the logic that controls the PME and PME_INT signals can be seen in
The PME module handles the latching of the Port 1 & 2 PHY Energy-Detect Status (ED_STS1 and
ED_STS2) and Wake-On LAN Status (WOL_STS) bits of the
ED_STS2) and Wake-On LAN Status (WOL_STS) bits of the
. This module also masks the status bits with the corresponding enable bits (ED_EN1,
ED_EN2, WOL_EN) and combines the results together to generate the PME_INT status bit in the
. The PME_INT status bit is then masked with the PME_EN bit and
conditioned before becoming the PME output pin.
The PME output characteristics can be configured via the PME_TYPE, PME_IND, and PME_POL bits
of the
of the
. These bits allow the PME to be open-drain,
active high push-pull, or active-low push-pull and configure the output to be continuous, or pulse for
50mS.
50mS.
Table 4.3 Hard-Strap Configuration Strap Definitions
STRAP NAME
DESCRIPTION
PIN
eeprom_type_strap
EEPROM Type Strap: Configures the EEPROM type.
0 = Microwire Mode
1 = I
1 = I
2
C Mode
EEPROM_TYPE
eeprom_size_strap[1:0]
EEPROM Size Strap [1:0]: Configures the EEPROM size
range as specified in
range as specified in
EEPROM_SIZE_[1:0]
phy_addr_sel_strap
PHY Address Select Strap: Configures the default MII
management address values for the PHYs and Virtual PHY
as detailed in
management address values for the PHYs and Virtual PHY
as detailed in
.
PHY_ADDR_SEL
P
H
Y
_
ADDR_SEL_
S
TRA
P
VALUE
V
IRT
UAL PHY
ADDRESS
PO
R
T
1
P
H
Y
ADDRESS
PO
R
T
2
P
H
Y
ADDRESS
0
0
1
2
1
1
2
3