DP83848CVVX National Semiconductor, DP83848CVVX Datasheet - Page 44

• Manufacturer Part Number: DP83848CVVX
• Manufacturer: National Semiconductor

Specifications of DP83848CVVX

• Lead Free Status / RoHS Status: Compliant

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7.1.2 Basic Mode Status Register (BMSR)
10:7
Bit
15
14
13
12
11
6
5
4
3
2
1
0
Auto-Negotiation Com-
Auto-Negotiation Abili-
Extended Capability
Jabber Detect
MF Preamble
Remote Fault
100BASE-T4
100BASE-TX
100BASE-TX
Suppression
RESERVED
Half Duplex
Half Duplex
Full Duplex
Full Duplex
Link Status
10BASE-T
10BASE-T
Bit Name
plete
ty
Table 13. Basic Mode Status Register (BMSR), address 0x01
0, RO/LH
0, RO/LH
0, RO/LL
0, 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
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.
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 Part-
ner 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 occur-
rence 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