LAN9500 Datasheet, PDF (105/213 Pages) SMSC Corporation – USB 2.0 to 10/100 Ethernet Controller Promiscuous mode

LAN950x
Note:
The IME bit is in the Hardware Configuration Register (HW_CFG). General Purpose IO Configuration Reg-
ister (GPIO_CFG) and General Purpose IO Wake Enable and Polarity Register (GPIO_WAKE) must be set
accordingly. PHY Link Up Enable (PHY_LINKUP_EN) bit of the General Purpose IO Wake Enable and
Polarity Register (GPIO_WAKE) must be set if PHY Link Up is to cause wake event. Diagram does not
represent actual hardware implementation.
FIGURE 5-36:
DETAILED GPIOS 8-10 WAKE DETECTION LOGIC (LAN9500A/LAN9500AI)
IME
GPCTLn[1]
GPCTLn[0]
GPDIRn
GPIOPOLn
GPIOn
Latch
GPDn
GPIOn_DET
GPIOn_INT clear
GPIOWKn
Note:
The IME bit is in the Hardware Configuration Register (HW_CFG). LED General Purpose IO Configuration
Register (LED_GPIO_CFG) and General Purpose IO Wake Enable and Polarity Register (GPIO_WAKE)
must be set accordingly. Diagram does not represent actual hardware implementation.
5.12.1.3 Remote Wake Generation
5.12.1.3.1
Wake On LAN Event or Energy DetecT
bit Control bits (Note 5-6) are implemented in the MAC’s Wakeup Control and Status Register (WUCSR) to control
Global Unicast Frame Wakeup, Magic Packet Wakeup, Wake Up Frame Detection Wakeup, Perfect DA Frame Wakeup,
and Broadcast Frame Wakeup: GUEN, MPEN, WUEN, PFDA_EN, and BCAST_EN, respectively. A composite signal,
depending on the state of these control bits and the associated event, is generated and propagated for further process-
ing, as discussed in the following text.
Note 5-6
(LAN9500A/LAN9500Ai ONLY):
The five specified control bits are supported.
(LAN9500/LAN9500i ONLY):
Only three control bits are supported - GUEN, MPEN, WUEN.
Two control bits are implemented in the PMT_CTRL SCSR: Wake-on-LAN enable (WOL_EN) and Energy Detect enable
(ED_EN). Depending on the state of these control bits, the logic will generate an internal wake event interrupt when the
MAC detects a wakeup event (Global Unicast Frame, Wakeup Frame, Magic Packet, Perfect Destination Address
Frame (Note 5-7), or Broadcast Frame (Note 5-7) - depending on the state of the aforementioned composite signal), or
a PHY interrupt is asserted (energy detect). Two Wakeup Status (WUPS) bits are implemented in the SCSR space.
These bits are set depending on the corresponding wake event. (See Section 7.3.8, "Power Management Control Reg-
ister (PMT_CTL)," on page 127 for further information). If a Wake-on-LAN event is detected, then further resolution on
the source of the event can be obtained by examining the Remote Wakeup Frame Received (WUFR), Magic Packet
Received (MPR), Perfect DA Frame Received (PFDA_FR) (Note 5-7), and Broadcast Frame Received (BCAST_FR)
(Note 5-7) status bits in the MAC’s Wakeup Control and Status Register (WUCSR).
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DS00001875A-page 105