dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 48

• Manufacturer Part Number: dp83630sqx
• Description: Precision Phyter - Ieee 1588 Precision Time Protocol Transceiver
• Manufacturer: National Semiconductor Corporation

www.national.com
10:8
Bit
15
14
13
12
11
14.1.2 Basic Mode Status Register (BMSR)
The PHY Identifier Registers #1 and #2 together form a unique identifier for the DP83630. The Identifier consists of a concatenation
of the Organizationally Unique Identifier (OUI), the vendor's model number and the model revision number. A PHY may return a
value of zero in each of the 32 bits of the PHY Identifier if desired. The PHY Identifier is intended to support network management.
National's IEEE assigned OUI is 080017h.
7
6
5
4
3
2
1
0
AUTO-NEGOTIATION
AUTO-NEGOTIATION
UNIDIRECTIONAL
JABBER DETECT
REMOTE FAULT
MF PREAMBLE
SUPPRESSION
HALF DUPLEX
HALF DUPLEX
FULL DUPLEX
FULL DUPLEX
LINK STATUS
100BASE-TX
100BASE-TX
100BASE-T4
CAPABILITY
RESERVED
COMPLETE
EXTENDED
10BASE-T
10BASE-T
Bit Name
ABILITY
ABILITY
TABLE 15. Basic Mode Status Register (BMSR), address 0x01
0, RO/LH
0, RO/LH
0, RO/LL
000, RO
0, RO/P
1, RO/P
1, RO/P
1, RO/P
1, RO/P
1, RO/P
1, RO/P
1, RO/P
1, RO/P
Default
0, RO
100BASE-T4 Capable:
0 = Device not able to perform 100BASE-T4 mode.
100BASE-TX Full Duplex Capable:
1 = Device able to perform 100BASE-TX in full duplex mode.
100BASE-TX Half Duplex Capable:
1 = Device able to perform 100BASE-TX in half duplex mode.
10BASE-T Full Duplex Capable:
1 = Device able to perform 10BASE-T in full duplex mode.
10BASE-T Half Duplex Capable:
1 = Device able to perform 10BASE-T in half duplex mode.
RESERVED: Write as 0, read as 0.
Unidirectional Ability:
1 = Device able to transmit in 100 Mb/s mode independent of link status.
Preamble Suppression Capable:
1 = Device able to perform management transaction with preamble suppressed, 32-bits
of preamble needed only once after reset, invalid opcode or invalid turnaround.
0 = Normal management operation.
Auto-Negotiation Complete:
1 = Auto-Negotiation process complete.
0 = Auto-Negotiation process not complete.
Remote Fault:
1 = Remote Fault condition detected (cleared on read or by reset). Fault criteria: Far
End Fault Indication or notification from Link Partner of Remote Fault.
0 = No remote fault condition detected.
Auto Negotiation Ability:
1 = Device is able to perform Auto-Negotiation.
0 = Device is not able to perform Auto-Negotiation.
Link Status:
1 = Valid link established (for either 10 or 100 Mb/s operation).
0 = Link not established.
The criteria for link validity is implementation specific. The occurrence of a link failure
condition will causes the Link Status bit to clear. Once cleared, this bit may only be set
by establishing a good link condition and a read via the management interface.
Jabber Detect: This bit only has meaning in 10 Mb/s mode.
1 = Jabber condition detected.
0 = No Jabber.
This bit is implemented with a latching function, such that the occurrence of a jabber
condition causes it to set until it is cleared by a read to this register by the management
interface or by a reset.
Extended Capability:
1 = Extended register capabilities.
0 = Basic register set capabilities only.
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Description