DP83861 datasheet(9/88 Pages) NSC

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1.7 Device Configuration Interface

INT

I/O, S, PD

208

INTERRUPT: Generates a interrupt upon PHY status changes. The

interrupt function is enabled in the extended register set. This pin is

not an Open Drain Output and can not be wired OR to other pins.

See Section 2.10

1. Each of the Speed LEDs (LED_10, LED_100, LED_1000) is AND’ed with good link LEDs. They will only come

on when the PHY has established good link at the speed indicated.

Signal Name

Type

Pin #

Description

AN_EN

TX_TCLK

I/O, S, PU

192

AUTO-NEGOTIATION ENABLE: Input to set value of Auto-Negotia-

tion Enable bit (register 0 bit-12).

‘1’ Enables Auto-Negotiation

‘0’ Disables Auto-Negotiation

TX_TCLK: Output used to measure jitter during Test Mode 3 as de-

scribed by IEEE 802.3ab specification. TX_TCLK should not be con-

fused with the TX_CLK signal.

MANUAL_M/S_Enable I/O, S, PD

195

MANUAL MASTER/SLAVE ENABLE: Input to set value of manual

Master/Slave Configuration Enable bit (register 9 bit-12). The

DP83861 still goes through the Auto-Negotiation process.

‘1’ Enables manual Master/Slave Configuration

‘0’ Disables manual Master/Slave Configuration

Manual M/S Advertise

I/O, S, PD

191

Manual MASTER/ SLAVE CONFIGURATION VALUE: Input to set

value of Master/Slave Advertise bit (register 9 bit 11). DP83861 still

goes through the Auto-Negotiation process.

‘1’ Configures PHY to Master during Master/Slave negotiation

‘0’ Configures PHY to Slave during Master/Slave negotiation.

This bit is only used if the Manual_M/S_Configuration is enabled.

1000FDX_ADV

I, S, PU

184

AUTO_NEG 1000 FDX ADVERTISE: The value strapped during

power/on reset determines the mode of operation advertised during

Auto-Negotiation.

‘1’ Advertises 1000 Mb/s Full Duplex capability

‘0’ Does not advertise 1000 Mb/s Full Duplex capability

LED_DUPLEX

1000HDX_ADV

I/O, S, PD

185

DUPLEX MODE SELECT/ 1000 Mb/s HALF DUPLEX ADVERTISE:

This strap option has two functions depending on whether Auto-Ne-

gotiation is enabled or not:

Auto-Negotiation disabled:

‘1’ straps on Full Duplex mode of operation

‘0’ straps on Half Duplex mode of operation.

Auto-Negotiation enabled:

‘1’ Advertises 1000 Mb/s Half Duplex capability

‘0’ Does not advertise 1000 Mb/s Half Duplex capability.

100_ADV

I/O, S, PU

181

100 Mb/s FULL/HALF DUPLEX ADVERTISE: This strap option pin

determines if 100 Mb/s Full/Half Duplex capability will be advertised

during Auto-Negotiation.

‘1’ Advertises both Full and Half Duplex capability

‘0’ Advertises neither 100 Mb/s capability

10_ADV

I/O, S, PD

180

10 Mb/s FULL/HALF DUPLEX ADVERTISE: This strap option pin

determines if 10 Mb/s Full/Half Duplex capability will be advertised

during Auto-Negotiation.

‘1’ Advertises both Full and Half Duplex capability

‘0’ Advertises neither 10 Mb/s capability

DP83861 Datasheet(PDF) 9 Page - National Semiconductor (TI)

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