DP83261 datasheet(122/132 Pages) NSC

122 / 132 page

Appendix A Ring Engine State Machines (Continued)

A12 MAC RECEIVER FOOTNOTES

A121 Internal Conditions

(1) ESA

OptionEnable Short Address

(2) ELA

OptionEnable Long Address

(3) IRR

OptionInhibit Recovery Required

l (nESA

nELA)

(4) IFCS

OptionImplementer FCS

(5) EMIND

OptionExternal Matching Indicators

(6) MAC

Reset

FunctionMAC Reset

lnModeRun

A122 Transition Conditions

(1) PH

Invalid

See encoding of PH Invalid in Section 7211

(2) PH

Indication (S1 S2)

S1 is the first symbol received

S2 is the second symbol received

See encoding of

Indication in Section 7211

(3) Transition R(12)

This Transition may be a 0 time transition from any state except R0Listen

A123 Actions

1 DA

Actions

IF FCL

4 0 CLEAR FCSL short address

ELSE SET FCSL

long address

After DA0r

IF DAIG

4 0 CLEAR DAIG individual address

ELSE SET DAIG

group address

IF FCSL

4 0 short address

After DA1r

SIGNAL DARCVD

IF DAIG e 1

THEN IF DAr is contained in set of Group Addresses

THEN SET A Flag

IF DAIG

4 0

THEN IF DAr

4 MSA

THEN SET A Flag

IF FCSL

4 1 long address

After DA5r

SIGNAL DARCVD

IF DAIG

4 1

THEN IF DAr is contained in set of Group Addresses

THEN SET A Flag

IF DAIG

4 0

THEN IF DAr

4 MLA

THEN SET A Flag

NOTE

A Flag may be set on reception of VOID frames

122

DP83261 Datasheet(PDF) 122 Page - National Semiconductor (TI)

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