DP83865-EB National Semiconductor, DP83865-EB Datasheet - Page 23

• Manufacturer Part Number: DP83865-EB
• Description: BOARD EVALUATION DP83865
• Manufacturer: National Semiconductor

Specifications of DP83865-EB

• Main Purpose: Interface, Ethernet
• Utilized Ic / Part: DP83865
• Lead Free Status / RoHS Status: Not applicable / Not applicable

2.0 Register Block
12
11
10
9
8
7
6
5
4
3
2
1
0
Extended Capability
Auto-Negotiation
Auto-Negotiation
Extended Status
Jabber Detect
Remote Fault
100BASE-T2
100BASE-T2
1000BASE-T
Suppression
Half Duplex
Half Duplex
Full Duplex
Full Duplex
Link Status
10BASE-T
10BASE-T
Reserved
Preamble
Complete
Ability
(Continued)
Table 4. Basic Mode Status Register (BMSR) address 0x01
0, RO, LH
0, RO, LH
0, RO, LL
0, RO
0, RO
1, P
1, P
0, P
0, P
1, P
1, P
1, P
1, P
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.
100BASE-T2 Full Duplex Capable:
0 = Device unable to perform 100BASE-T2 Full Duplex mode.
DP83865 does not support 100BASE-T2 mode and bit should al-
ways be read back as “0”.
100BASE-T2 Half Duplex Capable:
0 = Device unable to perform 100BASE-T2 Half Duplex mode.
DP83865 does not support 100BASE-T2 mode and bit should al-
ways be read back as “0”.
1000BASE-T Extended Status Register:
1 = Device supports Extended Status Register 0x0F.
Reserved by IEEE: Write ignored, read as 0.
Preamble suppression Capable:
1 = Device able to perform management transaction with pream-
ble suppressed, 32-bits of preamble needed only once after re-
set, invalid opcode or invalid turnaround.
Auto-Negotiation Complete:
1 = Auto-Negotiation process complete, and contents of registers
5, 6, 7, & 8 are valid.
0 = Auto-Negotiation process not complete.
Remote Fault:
1 = Remote Fault condition detected (cleared on read or by re-
set). Fault criteria: Far End Fault Indication or notification from
Link Partner of Remote Fault.
0 = No remote fault condition detected.
Auto Configuration Ability:
1 = Device is able to perform Auto-Negotiation.
Link Lost Since Last Read Status:
1 = Link was good since last read of this register. (10/100/1000
Mbps operation).
0 = Link was lost since last read of this register.
tus bit to clear. Once cleared, this bit may only be set by estab-
lishing a good link condition and a read via the management
interface.
This bit doesn’t indicate the link status, but rather if the link was
lost since last read. For actual link status, either this register
should be read twice, or register 0x11 bit 2 should be read.
Jabber Detect: Set to 1 if 10BASE-T Jabber detected locally.
1 = Jabber condition detected.
0 = No Jabber.
Extended Capability:
1 = Extended register capable.
The occurrence of a link failure condition will causes the Link Sta-
23
www.national.com