LAN9730 Datasheet, PDF (108/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
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 used to cause a wake event. Diagram does
not represent actual hardware implementation.
FIGURE 4-33:
DETAILED GPIOS 8-10 WAKE DETECTION LOGIC
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.
4.12.1.2 Remote Wake Generation
4.12.1.2.1 Wake On LAN Event or Energy Detect
Control bits 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 processing, as dis-
cussed in the following text.
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, or Broadcast Frame - depending on the state of the aforementioned composite signal), or a PHY inter-
rupt 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 6.3.8, "Power Management Control Register
(PMT_CTL)" 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), and Broadcast Frame Received (BCAST_FR) status bits in the MAC’s
Wakeup Control and Status Register (WUCSR).
Note: Wake On LAN events resulting in the generation of a remote-wake event may only occur when in SUS-
PEND0 state.
Note: Energy Detect events resulting in the generation of a remote-wake event may only occur when in SUS-
PEND1 state.
DS00001946A-page 108
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