LAN9313 datasheet(49/398 Pages) SMSC

49 / 398 page

Three Port 10/100 Managed Ethernet Switch with MII

Datasheet

SMSC LAN9313/LAN9313i

Revision 1.2 (04-08-08)

DATASHEET

BP_EN_strap_2

Port 2 Backpressure Enable Strap: Configures the

default value for the Port 2 Backpressure Enable

(BP_EN_2) bit of the Port 2 Manual Flow Control Register

(MANUAL_FC_2). When configured low, backpressure is

disabled. When configured high, backpressure is enabled.

BP_EN_2

FD_FC_strap_2

Port 2 Full-Duplex Flow Control Enable Strap:

Configures the default value of the Port 2 Full-Duplex

Transmit Flow Control Enable (TX_FC_2) and Port 2 Full-

Duplex Receive Flow Control Enable (RX_FC_2) bits in the

Port 2 Manual Flow Control Register (MANUAL_FC_2),

which are used when manual full-duplex control is selected.

When configured low, full-duplex Pause packet detection

and generation are disabled. When configured high, full-

duplex Pause packet detection and generation are enabled.

FD_FC_2

manual_FC_strap_2

Port 2 Manual Flow Control Enable Strap: Configures the

default value of the Port 2 Full-Duplex Manual Flow Control

Select (MANUAL_FC_2) bit in the Port 2 Manual Flow

Control Register (MANUAL_FC_2). When configured low,

flow control is determined by auto-negotiation (if enabled),

and symmetric PAUSE is advertised (bit 10 of the Port x

PHY Auto-Negotiation Advertisement Register

(PHY_AN_ADV_x) is set).

When configured high, flow control is determined by the

Port 2 Full-Duplex Transmit Flow Control Enable

(TX_FC_2) and Port 2 Full-Duplex Receive Flow Control

Enable (RX_FC_2) bits, and symmetric PAUSE is not

advertised (bit 10 of the Port x PHY Auto-Negotiation

Advertisement Register (PHY_AN_ADV_x) is cleared).

MANUAL_FC_2

speed_strap_mii

Port 0(External MII) Speed Select Strap: Together with

the duplex_pol_strap_mii and MII_DUPLEX pins,

configures the base ability values in the Virtual PHY Auto-

Negotiation Link Partner Base Page Ability Register

(VPHY_AN_LP_BASE_ABILITY).

This pin configures the speed for Port 0 when the Virtual

Auto-Negotiation fails. When configured low, 10Mbps is

selected. When configured high, 100Mbps is selected.

Refer to Section 13.1.7.6 and Table 13.6 for more

information.

SPEED_MII

duplex_pol_strap_mii

Port 0(External MII) Duplex Polarity Strap: Configures

the polarity of the MII_DUPLEX pin for Port 0.

If MII_DUPLEX = DUPLEX_POL_MII, full-duplex is

selected.

If MII_DUPLEX != DUPLEX_POL_MII, half-duplex is

selected.

Refer to Section 13.1.7.6 and Table 13.6 for more

information.

DUPLEX_POL_MII

BP_EN_strap_mii

Port 0(External MII) Backpressure Enable Strap:

Configures the default value for the Port 0 Backpressure

Enable (BP_EN_MII) bit of the Port 0(External MII) Manual

Flow Control Register (MANUAL_FC_MII). When

configured low, backpressure is disabled. When configured

high, backpressure is enabled.

BP_EN_MII

Table 4.2 Soft-Strap Configuration Strap Definitions (continued)

STRAP NAME

DESCRIPTION

PIN / DEFAULT

VALUE

LAN9313 Datasheet(PDF) 49 Page - SMSC Corporation

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