ADIN2111CCPZ-R7 datasheet(27/129 Pages) AD

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Data Sheet

ADIN2111

BRINGING UP 10BASE-T1L LINKS

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Rev. A | 27 of 129

When the high level transmit is disabled on PHY1 (respectively

PHY2) through the P1_TX2P4_EN (respectively P2_TX2P4_EN)

pin signal, the AVDD_H supply can be supplied from either 1.8 V or

3.3 V for the 1.0 V p-p transmit level operation.

Transmit Level Mode Advertisement

Enable High Voltage Transmit Ability

The AVDD_H power rail must be provided with a 3.3 V supply for

the ADIN2111 to support the 2.4 V p-p transmit level on Port 1 and

Port 2.

The high voltage transmit ability is enabled on the ADIN2111 PHY

1 (respectively PHY 2) by setting the P1_TX2P4_EN (respective-

ly P2_TX2P4_EN) hardware configuration pin signal low during

power-up, hardware reset, or software reset. The 10BASE-T1L

high voltage transmit ability bit (B10L_TX_LVL_HI_ABLE) in the

10BASE-T1L PMA status register (B10L_PMA_STAT) of the re-

spective PHY is set automatically to the defined hardware configu-

ration as follows:

►

B10L_TX_LVL_HI_ABLE = 0: 1.0 V p-p only ability

►

B10L_TX_LVL_HI_ABLE = 1: 1.0 V p-p and 2.4 V p-p ability

See the Configuration of Transmit Level Mode section for more

details.

Advertise High Voltage Transmit Ability

To advertise the high voltage transmit ability during autonegotia-

tion between PHY 1 (respectively PHY 2) and a link partner,

set the 10BASE-T1L high level transmit operating mode ability

bit (AN_ADV_B10L_TX_LVL_HI_ABL) in the BASE-T1 autonegotia-

tion advertisement register, Bits[47:32] (AN_ADV_ABILITY_H) to 1

on PHY 1 (respectively PHY 2). This bit can only be set if the

ADIN2111 PHY 1 (respectively PHY 2) has the ability to transmit

in high voltage mode (B10L_TX_LVL_HI_ABLE = 1 in the 10BASE-

T1L PMA status register).

High voltage transmit ability only enables the ADIN2111 PHY 1

(respectively PHY 2) to advertise support for both the 2.4 V p-p

and 1.0 V p-p levels. The selected level is determined by autonego-

tiation with the link partner.

See the Transmit Amplitude Advertisement section for more details.

Advertise a Request for High Voltage Transmit

Level

For each PHY, set the 10BASE-T1L high level transmit oper-

ating mode request bit (AN_ADV_B10L_TX_LVL_HI_REQ) in

the BASE-T1 autonegotiation advertisement register, Bits[47:32]

(AN_ADV_ABILITY_H) to 1 to advertise a request for 2.4 V p-p

transmit level operation during autonegotiation. This bit can only

be set if the ADIN2111 respective PHY has the ability to transmit

in high voltage mode (B10L_TX_LVL_HI_ABLE = 1 in the 10BASE-

T1L PMA status register).

See the Transmit Amplitude Advertisement section for more details.

Read Link Partner Advertised Transmit Level

For each PHY, the link partner advertised transmit infor-

mation can be read from the transmit operating mode

ability bit (AN_LP_ADV_B10L_TX_LVL_HI_ABL) and the link

partner high level transmit operating mode request bit

(AN_LP_ADV_B10L_TX_LVL_HI_REQ) in the BASE-T1 autone-

gotiation link partner base page ability register, Bits[47:32]

(AN_LP_ADV_ABILITY_H) of the respective PHY. These bits are

valid when autonegotiation completes (AN_COMPLETE = 1 in the

BASE-T1 autonegotiation status register).

See the Transmit Amplitude Advertisement section for more details.

Completion of Autonegotiation

When autonegotiation completes on PHY 1 or PHY 2, the autone-

gotiation complete indication register bit (AN_LINK_GOOD) in the

extra autonegotiation status register (AN_STATUS_EXTRA) is set

to 1 on the respective PHY. This bit indicates the completion of the

autonegotiation sequence and that the enabled PHY link is setting

up or active.

When autonegotiation completes and the link is up, the autone-

gotiation complete register bit (AN_COMPLETE in the BASE-T1

autonegotiation status register) is set to 1, and the contents of the

following registers are valid on the respective PHY:

►

BASE-T1 autonegotiation advertisement registers:

►

BASE-T1 autonegotiation advertisement register, Bits[15:0]

(AN_ADV_ABILITY_L)

►

BASE-T1 autonegotiation advertisement register, Bits[31:16]

(AN_ADV_ABILITY_M)

►

BASE-T1 autonegotiation advertisement register, Bits[47:32]

(AN_ADV_ABILITY_H)

►

BASE-T1 autonegotiation link partner base page ability registers:

►

BASE-T1 autonegotiation link partner base page ability regis-

ter, Bits[15:0] (AN_LP_ADV_ABILITY_L)

►

BASE-T1 autonegotiation link partner base page ability regis-

ter, Bits[31:16] (AN_LP_ADV_ABILITY_M)

►

BASE-T1 autonegotiation link partner base page ability regis-

ter, Bits[47:32] (AN_LP_ADV_ABILITY_H)

Link Status

The status of each PHY link can be determined by reading the

link status register bit (AN_LINK_STATUS) in the BASE-T1 autone-

gotiation status register (AN_STATUS) of the respective PHY. This

bit latches low.

When read as 1, this bit indicates that a valid link is established.

If this bit reads 0, the link failed since the last time it was read.

This bit latches low. Therefore, if a 0 is read, this bit must be read

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