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This register contains the advertised abilities of this device as they will be transmitted to its link partner during Auto-Nego-

tiation.

Table 11. Auto-Negotiation Advertisement Register (ANAR), address 0x04

Bit Bit Name Default Description

15 NP 0, RW Next Page Indication:

0 = Next Page Transfer not desired.

1 = Next Page Transfer desired.

14 RESERVED 0, RO/P RESERVED by IEEE: Writes ignored, Read as 0.

13 RF 0, RW Remote Fault:

1 = Advertises that this device has detected a Remote Fault.

0 = No Remote Fault detected.

12:11 RESERVED 0, RW RESERVED for Future IEEE use: Write as 0, Read as 0

10 PAUSE Strap, RW PAUSE: The default is set by the strap option for PAUSE_EN

pin.

1 = Advertise that the DTE (MAC) has implemented both the op-

tional MAC control sublayer and the pause function as specified in

clause 31 and annex 31B of 802.3u.

0= No MAC based full duplex flow control.

9 T4 0, RO/P 100BASE-T4 Support:

1= 100BASE-T4 is supported by the local device.

0 = 100BASE-T4 not supported.

8 TX_FD Strap, RW 100BASE-TX Full Duplex Support:

1 = 100BASE-TX Full Duplex is supported by the local device.

0 = 100BASE-TX Full Duplex not supported.

7 TX Strap, RW 100BASE-TX Support:

1 = 100BASE-TX is supported by the local device.

0 = 100BASE-TX not supported.

6 10_FD Strap, RW 10BASE-T Full Duplex Support:

1 = 10BASE-T Full Duplex is supported by the local device.

0 = 10BASE-T Full Duplex not supported.

5 10 Strap, RW 10BASE-T Support:

1 = 10BASE-T is supported by the local device.

0 = 10BASE-T not supported.

4:0 Selector <00001>, RW Protocol Selection Bits:

These bits contain the binary encoded protocol selector supported

by this port. <00001> indicates that this device supports IEEE

802.3u.

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This register contains the advertised abilities of the Link Partner as received during Auto-Negotiation. The content

changes after the successful autonegotiation if Next-pages are supported.

Table 12. Auto-Negotiation Link Partner Ability Register (ANLPAR) (BASE Page), address 0x05

Bit Bit Name Default Description

15 NP 0, RO Next Page Indication:

0 = Link Partner does not desire Next Page Transfer.

1 = Link Partner desires Next Page Transfer.

14 ACK 0, RO Acknowledge:

1 = Link Partner acknowledges reception of the ability data word.

0 = Not acknowledged.

The Device's Auto-Negotiation state machine will automatically

control the this bit based on the incoming FLP bursts.

13 RF 0, RO Remote Fault:

1 = Remote Fault indicated by Link Partner.

0 = No Remote Fault indicated by Link Partner.

12:10 RESERVED 0, RO RESERVED for Future IEEE use:

Write as 0, read as 0.

9T4 0, RO100BASE-T4 Support:

1 = 100BASE-T4 is supported by the Link Partner.

0 = 100BASE-T4 not supported by the Link Partner.

8TX_FD 0, RO100BASE-TX Full Duplex Support:

1 = 100BASE-TX Full Duplex is supported by the Link Partner.

0 = 100BASE-TX Full Duplex not supported by the Link Partner.

7TX 0, RO100BASE-TX Support:

1 = 100BASE-TX is supported by the Link Partner.

0 = 100BASE-TX not supported by the Link Partner.

6 10_FD 0, RO 10BASE-T Full Duplex Support:

1 = 10BASE-T Full Duplex is supported by the Link Partner.

0 = 10BASE-T Full Duplex not supported by the Link Partner.

510 0, RO10BASE-T Support:

1 = 10BASE-T is supported by the Link Partner.

0 = 10BASE-T not supported by the Link Partner.

4:0 Selector <0 0000>, RO Protocol Selection Bits:

Link Partner’s binary encoded protocol selector.

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DP83847

This register contains additional Local Device and Link Partner status information.

Table 13. Auto-Negotiation Link Partner Ability Register (ANLPAR) Next Page, address 0x05

Bit Bit Name Default Description

15 NP 0, RO Next Page Indication:

1 = Link Partner desires Next Page Transfer.

0 = Link Partner does not desire Next Page Transfer.

14 ACK 0, RO Acknowledge:

1 = Link Partner acknowledges reception of the ability data word.

0 = Not acknowledged.

The Device's Auto-Negotiation state machine will automatically

control the this bit based on the incoming FLP bursts. Software

should not attempt to write to this bit.

13 MP 0, RO Message Page:

1 = Message Page.

0 = Unformatted Page.

12 ACK2 0, RO Acknowledge 2:

1 = Link Partner does have the ability to comply to next page mes-

sage.

0 = Link Partner does not have the ability to comply to next page

message.

11 Toggle 0, RO Toggle:

1 = Previous value of the transmitted Link Code word equalled 0.

0 = Previous value of the transmitted Link Code word equalled 1.

10:0 CODE <000 0000 0000>,

Code:

This field represents the code field of the next page transmission.

If the MP bit is set (bit 13 of this register), then the code shall be

interpreted as a “Message Page”, as defined in annex 28C of

Clause 28. Otherwise, the code shall be interpreted as an “Unfor-

matted Page”, and the interpretation is application specific.

Table 14. Auto-Negotiate Expansion Register (ANER), address 0x06

Bit Bit Name Default Description

15:5 RESERVED 0, RO RESERVED: Writes ignored, Read as 0.

4 PDF 0, RO Parallel Detection Fault:

1 = A fault has been detected via the Parallel Detection function.

0 = A fault has not been detected.

3 LP_NP_ABLE 0, RO Link Partner Next Page Able:

1 = Link Partner does support Next Page.

0 = Link Partner does not support Next Page.

2 NP_ABLE 1, RO/P Next Page Able:

1 = Indicates local device is able to send additional “Next Pages”.

1 PAGE_RX 0, RO/COR Link Code Word Page Received:

1 = Link Code Word has been received, cleared on a read.

0 = Link Code Word has not been received.

0 LP_AN_ABLE 0, RO Link Partner Auto-Negotiation Able:

1 = indicates that the Link Partner supports Auto-Negotiation.

0 = indicates that the Link Partner does not support Auto-Negotia-

tion.

Part #	DP83847ALQA56A
Description	IC ETHERNET TRANSCEIVER 56WQFN
Category	IC
Availability	In Stock
Qty	4

DP83847ALQA56A

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