DP83261 datasheet(129/132 Pages) NSC

129 / 132 page

Appendix A Ring Engine State Machines (Continued)

(5) Recovery

Actions

IF T2

nTXReady

nTXPass

nTXED

THEN SET TXAbort

IF T5

THEN CLEAR TXAbort

CLEAR TXReady

TXAck

Void Strip

SET TXClass

4 nonrestricted SET TXPass

SET T Opr

4 T Max RESET TRT 4 T Opr SET Late

IF Ring Operational

THEN SET RELRRing Operational Reset

CLEAR Late Count

Ring Operational

(6) Start

Actions

CLEAR TXReady

TXAck

TXAbort

SET Void Strip

TXPass

RESET TRT

4 T Opr

(7) Issue

Actions

IF nRing Operational

THEN SET T Opr

4 T Neg RESET TRT 4 T Opr SET Late

IF TXClass

4 nonrestricted

nR Flag

THEN SET RbeginOK

ELSE CLEAR RbeginOK

A224 State Actions

(1) TRT

Actions

Always

IF TRT expires

THEN RESET TRT

4 T Opr

IF n((T0

lT1)TK Received

nIRPT)

THEN IF nLate

THEN SET Late

ELSE SET TELRTRT Expired

IF nRing Operational

THEN INCREMENT Late Count

IF (T4

n(My Claim

nITR

nIRPT))l

(T5

n(My Beacon

(Claim Request

lnIRR)))

THEN SET TELRRecovery Failed

(2) RLCT

Actions

Always

IF TELRRing Latency Valid

lMAC Resetl(nESA

nELA)l

(TRT expires

Late)

lPH Invalidl

Lower Claim

lMy BeaconlHigher Claiml

Other Beacon

lOther MAClTK ReceivedlOther Void

THEN DISABLE Latency Count

IF My Void

Latency Count enabled

THEN SET TELRRing Latency Valid

(3) TX

Idle

Actions (T0)

Always

PH Datarequest(II)

IF My Void

lOther Void

THEN CLEAR Void Strip

129

DP83261 Datasheet(PDF) 129 Page - National Semiconductor (TI)

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