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DP83266 Scheda tecnica(PDF) 128 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte DP83266
Spiegazioni elettronici  MACSITM Device (FDDI Media Access Controller and System Interface)
PDF  152 Pages
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83266 Scheda tecnica(HTML) 128 Page - National Semiconductor (TI)

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70 Control Information (Continued)
Bit
Symbol
Description
Word 1
D7 – D0
RES
Reserved
D15–D8
CS
Confirmation Status
D9–D8
FT
Frame Type
This field reflects the type of frame that ended Full Confirmation
00
Any Other
01
Token
10
Other Void
11
My Void
D10
F
Full Confirm
This bit is set when the Request was for Full Conformation
D11
U
Unexpected Frame Status
This bit is set when the frame status does not match the value
programmed in the Request Expected Frame Status Register This applies only to Full
Confirmation
D12
P
Parity
This bit is set when a parity error is detected in a received frame Parity is checked from FC
to ED inclusive if the FLOW bit in the Mode Register is set
D13
E
Exception
This bit is part of the MACSI’s hierarchical status reporting It is set when an exception
occurs during confirmation An exception is any one of the nine error or exception codes described
in the RS Field The RCHN’s EXC bit in the Request Attention Register is also set
D14
R
Ring-Op
This bit is set when the ring changes operational state after transmission but before all
returning frames have been confirmed
D15
T
Transmit Class
0
Restricted
1
Non-Restricted
D23 – D16
FC
Frame Control
Frame Control field of the last frame of the last confirmed burst Valid only for Full
Confirmation
D29 – D24
UID
User Identification
Contains the UID field copied from the current REQFirst or REQOnly
D31 – D30
F-L
FirstLast Tag
Identifies the CNF part ie Only First Middle or Last FL e 10 e First FL e 00
e
Middle FL e 01 e Last FL e 11-Only
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