ST802RT1B datasheet(32/58 Pages) STMICROELECTRONICS

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Registers and descriptors description

ST802RT1A, ST802RT1B

32/58

Doc ID 17049 Rev 1

Bit

Bit name

Description

Default

Type

Parallel Detection

Fault

1 -> A fault has been detected via the parallel detection

function (updated on read)

0 -> A fault has not been detected

0RO

Remote Fault

1 -> Remote fault condition detected

0 -> No remote fault condition detected

Set when link partner signaled a remote fault condition (RN05 -

bit 13) or a far-end-fault indicator was asserted. Latched, so

the occurrence of a remote fault causes the remote fault bit to

become set and remain set until it is cleared (by register read,

if no more fault is present).

0RO

Page Received

1 -> Link code word received (updated on read)

0 -> LCW not yet received

0RO

Link Partner Auto-

Negotiation Able

1 -> LP supports auto-negotiation (updated on read)

0 -> LP does not support auto-negotiation

0RO

SP100 indicate

1 -> Speed is 100 Mb/s

0 -> Speed is 10 Mb/s

Set by auto-negotiation 100BASE-TX link control

0RO

Link Status

1 -> Link is up (10–100 Mb/s)

0 -> Link is down

This bit is cleared at link failure and set after a register read if a

valid link is established

0RO

Auto-negotiation

enable

1 -> Auto-negotiation enabled

0 -> Auto-negotiation disabled

Set by RN00[12], if RN11[10] is 0 (not FX-mode)

0RO

Jabber Detect

1 -> Jabber condition detected

0 -> No jabber condition detected.

Set at jabber condition detection, cleared only after register

read (if no more jabber condition is present).

Fixed to 0 in 100Base-X modes.

Same as RN01[1]

0RO

Table 25.

RN19 [0d25, 0x19]: Auxiliary status register (continued)

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