DP83266 datasheet(127/152 Pages) NSC

tên linh kiện	DP83266

Giải thích chi tiết về linh kiện	MACSITM Device (FDDI Media Access Controller and System Interface)

PDF	152 Pages

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nhà sản xuất	NSC [National Semiconductor (TI)]

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70 Control Information (Continued)

Bit

Symbol

Description

Word 0

(Continued)

D27 – D24

FRA

Frame Attributes

This field is valid only for Full Confirmation

D25 – D24

Termination Condition

Other (eg MAC Resettoken)

Format error

Frame stripped

D26

AFLAG

Reflects the state of the AFLAG input signal which is sampled by the MACSI device at

INFORCVD

No DA Match

DA Match

D27

MFLAG

Reflects the state of the MFLAG input signal which is sampled by the MACSI device at

INFORCVD

Frame Sent by another station

Frame Sent by this station

D31 – D28

Request Status

This field represents a priority encoded status value with the highest number

having the highest priority This field is described in

Figure 7-8

RS3

RS2

RS1

RS0

Meaning

D31

D30

D29

D28

Intermediate

0000

None

0001

Preempted

0010

Part Done

Breakpoints

0011

Service Loss

0100

Reserved

Completion

0101

Completed Beacon

0110

Completed OK

Exception Completion

0111

Bad Confirmation

1000

Underrun

1001

Host Abort

1010

Bad Ringop

1011

MAC Abort

1100

Timeout

1101

MAC Reset

1110

Consistency Failure

Error

1111

Internal or Fatal ABus Error

127

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