MA28140 datasheet(13/72 Pages) DYNEX

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MA28140

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Event

Condit ions

Event

Numbe r

OPEN

WAI T

LOCKO UT

(Cont') Valid

N(S)<V(R) and N(S)>

V(R)-NW i.e. inside

negative part of sliding

window

Discard

(S1)

Discard

(S2)

Discard

(S3)

AD frame

arrives

N(S)>V(R)+PW-1 and

N(S)<V(R)-NW i.e.outside

sliding window

Discard

Lockout

Flag:=1

(S3)

Discard

Lockout

Flag:=1

(S3)

Discard

(S3)

Valid BD frame arrives*

Accept, Increment

FARM-B Counter

(S1)

Accept, Increment

FARM-B Counter

(S2)

Accept, Increment

FARM-B Counter

(S3)

Valid Unlock BC frame arrives

Increment FARM-B

Counter,

Retransmit Flag:=0

(S1)

Increment FARM-B

Counter,

Retransmit Flag:=0,

Wait Flag:=0

(S1)

Increment FARM-B

Counter,

Retransmit Flag:=0,

Wait Flag:=0, Lockout

Flag:=0

(S1)

Valid Set V(R) to V*(R) BC frame arrives

Increment FARM-B

Counter,

Retransmit Flag:=0

V(R):=V*(R)

(S1)

Increment FARM-B

Counter,

Retransmit Flag:=0

Wait Flag:=0

V(R):=V*(R)

(S1)

Increment FARM-B

Counter,

(S3)

Invalid frame arrives

Discard

(S1)

Discard

(S1)

Discard

(S3)

Buffer release signal

E10

Ignore

(S1)

Wait Flag:=0

(S1)

Wait Flag:=0

(S3)

CLCW report time

E11

Report value of:

V(R),

Lockout Flag,

Wait Flag,

Retransmit Flag,

FARM-B Counter

(S1)

Report value of:

V(R),

Lockout Flag,

Wait Flag,

Retransmit Flag,

FARM-B Counter

(S2)

Report value of: V(R),

Lockout Flag,

Wait Flag,

Retransmit Flag,

FARM-B Counter

(S3)

* Note: Event E6 implies that Event E10 also occurs. When in state S2, an event E6 will lead to state S1.

Table 1: The FARM-1 State Table (continued)

MA28140 Datasheet(PDF) 13 Page - Dynex Semiconductor

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