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KSZ9031RNX

Gigabit Ethernet Transceiver with RGMII Support

Micrel 

Micrel, Inc.

KSZ9031RNX

Pin Description

Pin Number

Pin Name

Type(2) Pin Function

1

AVDDH

P

3.3V/2.5V (commercial temp only) analog VDD

Media Dependent Interface[0], positive signal of differential pair

1000Base-T mode:

2

TXRXP_A

I/O

TXRXP_A corresponds to BI_DA+ for MDI configuration and BI_DB+ for

MDI-X configuration, respectively.

10Base-T/100Base-TX mode:

TXRXP_A is the positive transmit signal (TX+) for MDI configuration and the

positive receive signal (RX+) for MDI-X configuration, respectively.

Media Dependent Interface[0], negative signal of differential pair

1000Base-T mode:

3

TXRXM_A

I/O

TXRXM_A corresponds to BI_DA– for MDI configuration and BI_DB– for

MDI-X configuration, respectively.

10Base-T/100Base-TX mode:

TXRXM_A is the negative transmit signal (TX–) for MDI configuration and

the negative receive signal (RX–) for MDI-X configuration, respectively.

4

AVDDL

P

1.2V analog VDD

Media Dependent Interface[1], positive signal of differential pair

1000Base-T mode:

5

TXRXP_B

I/O

TXRXP_B corresponds to BI_DB+ for MDI configuration and BI_DA+ for

MDI-X configuration, respectively.

10Base-T/100Base-TX mode:

TXRXP_B is the positive receive signal (RX+) for MDI configuration and the

positive transmit signal (TX+) for MDI-X configuration, respectively.

Media Dependent Interface[1], negative signal of differential pair

1000Base-T mode:

6

TXRXM_B

I/O

TXRXM_B corresponds to BI_DB– for MDI configuration and BI_DA– for

MDI-X configuration, respectively.

10Base-T/100Base-TX mode:

TXRXM_B is the negative receive signal (RX–) for MDI configuration and

the negative transmit signal (TX–) for MDI-X configuration, respectively.

Media Dependent Interface[2], positive signal of differential pair

1000Base-T mode:

7

TXRXP_C

I/O

TXRXP_C corresponds to BI_DC+ for MDI configuration and BI_DD+ for

MDI-X configuration, respectively.

10Base-T/100Base-TX mode:

TXRXP_C is not used.

Note:

2. P = Power supply.

GND = Ground.

I = Input.

O = Output.

I/O = Bi-directional.

Ipu = Input with internal pull-up (see Electrical Characteristics for value).

Ipu/O = Input with internal pull-up (see Electrical Characteristics for value)/Output.

May 14, 2015

9

Revision 2.2

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