LAN9730 Datasheet, PDF (130/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
6.3.8 POWER MANAGEMENT CONTROL REGISTER (PMT_CTL)
Address:
020h
Size:
32 bits
This register controls the power management features.
Bits
31:10
9
Description
RESERVED
Resume Clears Remote Wakeup Status (RES_CLR_WKP_STS)
When set, the Remote Wakeup Frame Received (WUFR), Magic Packet
Received (MPR), Perfect DA Frame Received (PFDA_FR) and Broadcast
Frame Received (BCAST_FR) status signals in the Wakeup Control and Sta-
tus Register (WUCSR) will clear upon the completion of a resume sequence.
When set, this bit also affects the WUPS field. WUPS[1] will clear upon com-
pletion of a resume event.
When cleared, the wakeup status signals are not cleared after a resume.
8 Resume Clears Remote Wakeup Enables (RES_CLR_WKP_EN)
when asserted, all wakeup enable bits are cleared after a resume sequence,
initiated from a remote wakeup, completes. Resumes initiated by the host do
not clear the wakeup enables.
Type
RO
R/W
R/W
Note:
Global Unicast Wakeup Enable (GUEN), Perfect DA Wakeup
Enable (PFDA_EN), Wakeup Frame Enable (WUEN), Magic Packet
Enable (MPEN), and Broadcast Wakeup Enable (BCAST_EN) are
not included.
7 Device Ready (READY)
RO
When set, this bit indicates that the device is in the NORMAL state and the ini-
tial hardware configuration of the device has been completed.
Note: This bit is useful for events (USB Reset) that do not trigger a soft
disconnect.
Note:
In the case where no PHY clocks are present to complete a system
reset, this bit will not be set until the watchdog timer expires. This
is applicable for a Lite Reset and when transitioning to the Normal
Configured state.
6:5 Suspend Mode (SUSPEND_MODE)
R/W
Indicates which suspend power state to use after the host suspends the
device.
If the device is deconfigured, it transitions to the NORMAL Unconfigured state
and this register will reset to the value 10b.
SUSPEND_MODE encoding:
00 = SUSPEND0
01 = SUSPEND1
10 = SUSPEND2
11 = SUSPEND3
Note: It is not valid to select any suspend variant besides SUSPEND2
when in the NORMAL Unconfigured state.
Default
-
0b
1b
0b
10b
DS00001946A-page 130
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