KSZ9031RNXVC datasheet(39/78 Pages) MICROCHIP

39 / 78 page

 2016 Microchip Technology Inc.

DS00002117C-page 39

KSZ9031RNX

Note 4-1

RW = Read/Write; RO = Read Only; SC = Self-Cleared; LH = Latch High; LL = Latch Low.

D.4:0

MMD –

Device

Address

These five bits set the MMD device address.

0_0000

E.15:0

MMD –

Data

For the selected MMD device address (Reg. Dh,

Bits [4:0]),

When Reg. Dh, Bits [15:14] = 00, this register

contains the read/write register address for the

MMD device address.

Otherwise, this register contains the read/write

data value for the MMD device address and its

selected register address.

See also Reg. Dh, Bits [15:14], for descriptions of

post increment reads and writes of this register for

data operation.

0000_0000_0000_00

F.15

1000BASE-X

Full-Duplex

1 = PHY can perform 1000BASE-X full-duplex

0 = PHY cannot perform 1000BASE-X full-duplex

F.14

1000BASE-X

Half-Duplex

1 = PHY can perform 1000BASE-X half-duplex

0 = PHY cannot perform 1000BASE-X half-duplex

F.13

1000BASE-T

Full-Duplex

1 = PHY can perform 1000BASE-T full-duplex

0 = PHY cannot perform 1000BASE-T full-duplex

F.12

1000BASE-T

Half-Duplex

1 = PHY can perform 1000BASE-T half-duplex

0 = PHY cannot perform 1000BASE-T half-duplex

F.11:0

Reserved

Ignore when read

—

TABLE 4-4:

VENDOR-SPECIFIC REGISTER DESCRIPTIONS

Address

Name

Description

Mode

Note 4-1

Default

11.15:9

Reserved

0000_000

11.8

Remote

Loopback

1 = Enable remote loopback

0 = Disable remote loopback

11.7:1

Reserved

1111_010

11.0

Reserved

12.15

Cable

Diagnostic

Test Enable

Write value:

1 = Enable cable diagnostic test. After test has

completed, this bit is self-cleared.

0 = Disable cable diagnostic test.

Read value:

1 = Cable diagnostic test is in progress.

0 = Indicates cable diagnostic test (if enabled) has

completed and the status information is valid for

read.

RW/SC

12.14

Reserved

This bit should always be set to ‘0’.

TABLE 4-3:

IEEE-DEFINED REGISTER DESCRIPTIONS (CONTINUED)

Address

Name

Description

Mode

Note 4-1

Default

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