TNETX3100 datasheet(30/80 Pages) TI1

30 / 80 page

TNETX3100

ThunderSWITCH™ 10-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS031D – JUNE 1997 – REVISED OCTOBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

port-N status register at 0x2*N + 0x0081 (read only) (N = port number in hex) (continued)

PORT STATE

FUNCTION

000

Enabled. This is the normal state of a port. This is the only port state during which frames are forwarded to the port. In all other

states, no new frames are forwarded to the port.

001

Suspended due to link failure. The port has been suspended due to the absence of link activity at the port, as indicated by an

inactive (zero) state of the port’s MXXLINK terminal. This can indicate cable failure or indicate that there is no station attached

to the port. The port is reenabled when link activity is detected at the port, indicated by an active (1) state of the port’s MXXLINK

terminal. If link is lost during transmission of a frame, transmission continues until the start of the next frame (the transmitted

frame is lost). If link is lost during transmit, all enqueued frames are transmitted.

010

Reserved

011

Reserved

100

Disabled by management. The port has been explicitly disabled by a DISABLE control bit write (or it is in the buffer initialization

state). In this state, the port can be reenabled only by writing a 1 to the ENABLE control bit, or by clearing the disable bit.

101

Reserved

110

Disabled due to address duplication. The port has been disabled due to the reception at the port of a frame with a source

address securely assigned to another port. In this state, no frames are forwarded to or from the port, and no address learning

takes place. A port in this state is reenabled only by writing a 1 to the ENABLE control bit.

111

Reserved

revision register at 0x00A0

BIT

Revision

BIT

NAME

FUNCTION

7–4

Revision

Hardware revision code for this device. This field is read only. Revision 0.0 devices have a revision code of 0x00.

Bits 7–4 denote the major digit.

3–0

Revision

Hardware revision code for this device. This field is read only. Revision 0.0 devices have a revision code of 0x00.

Bits 3–0 denote the minor digit.

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