DP83848T-MAU-EK National Semiconductor, DP83848T-MAU-EK Datasheet - Page 41

• Manufacturer Part Number: DP83848T-MAU-EK
• Description: BOARD EVALUATION DP83848T
• Manufacturer: National Semiconductor

Specifications of DP83848T-MAU-EK

• Main Purpose: Interface, Ethernet
• Utilized Ic / Part: DP83848T
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

7.1.2 Basic Mode Status Register (BMSR)
10:7
Bit
15
14
13
12
11
6:0
6
5
4
3
2
Bit
7
Auto-Negotiation Com-
Auto-Negotiation Abili-
Collision Test
RESERVED
MF Preamble
Remote Fault
100BASE-T4
100BASE-TX
100BASE-TX
Suppression
Bit Name
RESERVED
Half Duplex
Half Duplex
Full Duplex
Full Duplex
Link Status
10BASE-T
10BASE-T
Bit Name
Table 12. Basic Mode Control Register (BMCR), address 0x00 (Continued)
plete
ty
Table 13. Basic Mode Status Register (BMSR), address 0x01
Default
0, RW
0, RO
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
Default
0, RO
0, RO
Collision Test:
1 = Collision test enabled.
0 = Normal operation.
When set, this bit will cause the COL signal to be asserted in response
to the assertion of TX_EN within 512-bit times. The COL signal will be
de-asserted within 4-bit times in response to the de-assertion of
TX_EN.
RESERVED: Write ignored, read as 0.
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.
41
Description
Description
www.national.com