LAN89730 datasheet(129/218 Pages) MICROCHIP

129 / 218 page

 2013-2015 Microchip Technology Inc.

DS60001348A-page 129

LAN89730

PHY Reset (PHY_RST)

Writing a '1' to this bit resets the PHY. The internal logic automatically holds

the PHY reset for a minimum of 2 ms. When the PHY is released from reset,

this bit is automatically cleared. All writes to this bit are ignored while this bit is

high.

Note:

The device will NAK all USB transfers until the PHY reset

completes.

Wake On LAN Enable (WOL_EN)

Enables WOL as a wakeup event.

This bit is automatically cleared at the completion of a resume sequence if

Resume Clears Remote Wakeup Enables (RES_CLR_WKP_EN) is set.

R/W

Energy-Detect Enable (ED_EN)

Enables Energy-Detect as a wakeup event.

This bit is automatically cleared at the completion of a resume sequence if

Resume Clears Remote Wakeup Enables (RES_CLR_WKP_EN) is set.

R/W

1:0

Wakeup Status (WUPS)

This field indicates the cause of the current wakeup event. The WUPS[0] and

WUPS[1] bits are set and cleared independently. A WUPS bit may be cleared

by writing a ‘1’ to the corresponding bit. The encoding of these bits (WUPS[1],

WUPS[0]) is as follows:

More than one bit may be set indicating that multiple events occurred.

The WUPS field will not be set unless the corresponding event is enabled

prior to entering the reduced power state.

These bits will set regardless of the values in Wake On LAN Enable

(WOL_EN) and Energy-Detect Enable (ED_EN).

If the Resume Clears Remote Wakeup Status (RES_CLR_WKP_STS) bit is

set, WUPS[1] will clear upon completion of a resume. See the Resume Clears

Remote Wakeup Status (RES_CLR_WKP_STS) bit for further details.

Note:

It is not valid to simultaneously clear the WUPS bits and change the

contents of the Suspend Mode (SUSPEND_MODE) field.

R/WC

00b

Bits

Description

Type

Default

WUPS[1:0]

Event

No wake-up event detected

Energy-Detect (SUSPEND1)

Wake On LAN (SUSPEND0) / Good Frame (SUSPEND3)

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