LAN9730 datasheet(106/222 Pages) MICROCHIP

106 / 222 page

LAN9730/LAN9730i

DS00001946A-page 106

 2012-2015 Microchip Technology Inc.

4.12.1

DETECTING WAKEUP EVENTS

The following sections illustrate and discuss the wakeup detection logic.

4.12.1.1

Wake Detection Logic

A simplified diagram of the wake event detection logic is shown in Figure 4-30.

The functionality of GPIOs 0-6 and GPIOs 8-10 is slightly different. The functionality of GPIO7 is similar to that of GPIOs

0-6, with the additional requirement that it must cause a wakeup event when enabled for use in PHY Link Up detection.

GPIOs 8-10 are available for use in both internal and external Ethernet PHY mode of operation. Their functionality is

depicted in Figure 4-33.

FIGURE 4-30:

WAKE EVENT DETECTION BLOCK DIAGRAM

Note:

Diagram does not represent actual hardware implementation.

Note:

GPIOs 0-7 are only available for use during internal Ethernet PHY mode of operation. The functionality of

GPIOs 0-6 is depicted in Figure 4-31, while that of GPIO7 is shown in Figure 4-32.

WOL_EN

(PMT_CTL Register)

WUPS[1]

(PMT_CTL Register)

SUSPEND0

ED_EN

(PMT_CTL Register)

WUPS[0]

(PMT_CTL Register)

MPEN

(WUSCR Register)

MPR

(WUSCR Register)

GPIO0_DET

remote_wake

PFDA_EN

(WUSCR Register)

BCAST_EN

(WUSCR Register)

Good Frame

Received

SUSPEND1

SUSPEND2

SUSPEND3

GUEN

(WUSCR Register)

GPIO10_DET

MP detect

BCAST_FR

(WUCSR Register)

BCast detect

PFDA_FR

(WUSCR Register)

PFDA detect

WUFR

(WUSCR Register)

WU detect

GU detect

WUEN

(WUSCR Register)

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