LAN9311 Datasheet, PDF (264/461 Pages) SMSC Corporation – Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Two Port 10/100 Managed Ethernet Switch with 16-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
LAN9311/LAN9311i. The ready state of the LAN9311/LAN9311i 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 LAN9311/LAN9311i is in the reset or not ready
state (READY bit is cleared).
Note: Either half of this register can be read without the need to read the other half.
BITS
DESCRIPTION
31:18 RESERVED
17
16
15
14
13:11
Energy-Detect Status Port 2 (ED_STS2)
This bit indicates an energy detect event occurred on the Port 2 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 Status Port 1 (ED_STS1)
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.
Energy-Detect Enable Port 1 (ED_EN1)
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.
RESERVED
10 Virtual PHY Reset (VPHY_RST)
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.
TYPE
RO
R/WC
R/WC
R/W
R/W
RO
R/W
SC
DEFAULT
-
0b
0b
0b
0b
-
0b
Revision 2.0 (02-14-13)
264
DATASHEET
SMSC LAN9311/LAN9311i