LAN9353 Datasheet, PDF(197/523 Page) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

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LAN9353 Datasheet, PDF (197/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

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LAN9353

Bits

Description

Type

8

100BASE-X Full Duplex

RO

This bit indicates the emulated link partner PHY 100BASE-X full duplex capa-

bility.

Default

Note 58

0: 100BASE-X full duplex ability not supported

1: 100BASE-X full duplex ability supported

7

100BASE-X Half Duplex

This bit indicates the emulated link partner PHY 100BASE-X half duplex

capability.

RO

Note 58

0: 100BASE-X half duplex ability not supported

1: 100BASE-X half duplex ability supported

6

10BASE-T Full Duplex

RO

This bit indicates the emulated link partner PHY 10BASE-T full duplex capa-

bility.

Note 58

0: 10BASE-T full duplex ability not supported

1: 10BASE-T full duplex ability supported

5

10BASE-T Half Duplex

RO

This bit indicates the emulated link partner PHY 10BASE-T half duplex capa-

bility.

Note 58

0: 10BASE-T half duplex ability not supported

1: 10BASE-T half duplex ability supported

4:0 Selector Field

This field identifies the type of message being sent by Auto-Negotiation.

RO

00001b

00001: IEEE 802.3

Note 55: The reserved bits 31-16 are used to pad the register to 32-bits so that each register is on a DWORD bound-

ary. When accessed serially (through the MII management protocol), the register is 16-bits wide.

Note 56: The emulated link partner does not support next page, always instantly sends its link code word, never

sends a fault, and does not support 100BASE-T4.

Note 57: The emulated link partnerâs asymmetric/symmetric pause ability is based upon the values of the Asymmetric

Pause and Symmetric Pause bits of the Port x Virtual PHY Auto-Negotiation Advertisement Register

(VPHY_AN_ADV_x). Thus the emulated link partner always accommodates the request of the Virtual PHY,

as shown in Table 9-22.

The link partner pause ability bits are determined when Auto-Negotiation is complete. Changing the Port x

Virtual PHY Auto-Negotiation Advertisement Register (VPHY_AN_ADV_x) will have no affect until the Auto-

Negotiation process is re-run.

If the local device advertises both Symmetric and Asymmetric Pause, the result is determined based on the

FD_FC_strap_x configuration strap. This allows the user the choice of network emulation. If FD_FC_strap_x

= 1, then the result is Symmetrical, else Asymmetrical. See Section 9.3.1, "Virtual PHY Auto-Negotiation,"

on page 181 for additional information.

ï£ 2015 Microchip Technology Inc.

DS00001925A-page 197

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