High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
14.2.9.4
Power Management Control Register (PMT_CTRL)
Offset:
084h
Size:
32 bits
This read-write register controls the power management features and the PME pin of the LAN9312.
The ready state of the LAN9312 can be determined via the Device Ready (READY) bit of this register.
Refer to Section 4.3, "Power Management," on page 46 for additional information.
Note: This register is one of only four registers (the others are HW_CFG, BYTE_TEST, and
RESET_CTL) which can be polled while the LAN9312 is in the reset or not ready state (READY
bit is cleared).
BITS
31:18
17
DESCRIPTION
TYPE
RO
DEFAULT
RESERVED
-
Energy-Detect Status Port 2 (ED_STS2)
This bit indicates an energy detect event occurred on the Port 2 PHY.
R/WC
0b
In order to clear this bit, it is required that the event in the PHY be cleared
as well. The event sources are described in Section 4.3, "Power
Management," on page 46.
16
15
Energy-Detect Status Port 1 (ED_STS1)
R/WC
R/W
0b
0b
This bit indicates an energy detect event occurred on the Port 1 PHY.
In order to clear this bit, it is required that the event in the PHY be cleared
as well. The event sources are described in Section 4.3, "Power
Management," on page 46.
Energy-Detect Enable Port 2 (ED_EN2)
When set, the PME signal (if enabled via the PME_EN bit) will be asserted
in accordance with the PME_IND bit upon an energy-detect event from Port
2. When set, the PME_INT bit in the Interrupt Status Register (INT_STS) will
also be asserted upon an energy-detect event from Port 2, regardless of the
setting of the PME_EN bit.
Note:
The EDPWRDOWN bit of the Port x PHY Mode Control/Status
Register (PHY_MODE_CONTROL_STATUS_x) of the Port 2 PHY
must also be set to enable the energy detect feature.
14
Energy-Detect Enable Port 1 (ED_EN1)
R/W
0b
When set, the PME signal (if enabled via the PME_EN bit) will be asserted
in accordance with the PME_IND bit upon an energy-detect event from Port
1. When set, the PME_INT bit in the Interrupt Status Register (INT_STS) will
also be asserted upon an energy-detect event from Port 1, regardless of the
setting of the PME_EN bit.
Note:
The EDPWRDOWN bit in the Port x PHY Mode Control/Status
Register (PHY_MODE_CONTROL_STATUS_x) of the Port 1 PHY
must also be set to enable the energy detect feature.
13:11
10
RESERVED
RO
-
Virtual PHY Reset (VPHY_RST)
R/W
SC
0b
Writing a 1 to this bit resets the Virtual PHY. When the Virtual PHY is
released from reset, this bit is automatically cleared. All writes to this bit are
ignored while this bit is high.
9
Wake-On-LAN Enable (WOL_EN)
R/W
0b
When set, the PME signal (if enabled via the PME_EN bit) will be asserted
in accordance with the PME_IND bit upon a WOL event. When set, the
PME_INT bit in the Interrupt Status Register (INT_STS) will also be asserted
upon a WOL event, regardless of the setting of the PME_EN bit.
Revision 1.2 (04-08-08)
264
SMSC LAN9312
DATASHEET
SMSC [ SMSC CORPORATION ]
