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DP83261AVF 데이터시트(PDF) 35 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 DP83261AVF
상세설명  BMAC Device (FDDI Media Access Controller)
PDF  132 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83261AVF 데이터시트(HTML) 35 Page - National Semiconductor (TI)

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60 Control Information (Continued)
Current Transmitter Status Register (CTS0)
The Current Transmitter Status Register (CTS0) records the status of the Transmitter state machine It is continuously updated
It remains stable when accessed When in Diagnose Mode this register is frozen on an internal error until the internal error
event is cleared by resetting the TSMERR bit of the Internal Event Latch Register
ACCESS RULES
Address
Read
Write
0Eh
Always
Data Ignored
REGISTER BITS
D7
D6
D5
D4
D3
D2
D1
D0
ROP
TS2
TS1
TS0
TTS3
TTS2
TTS1
TTS0
Bit
Symbol
Description
D0 – 3
TTS(0 – 3)
TRANSMIT TIMING STATE
TTS(0 – 3) represent the current state of the Transmitter
Timing state machine The encoding is shown below
TTS3
TTS2
TTS1
TTS0
Transmit Timing State
0
0
0
0
Idle
0
0
0
1
Transmit Preamble
0
0
1
0
Wait for Data (FIFO)
0
0
1
1
Transmit SD
FC Fields
0
1
0
0
Transmit DA
0
1
0
1
Transmit SA
0
1
1
0
Transmit INFO
0
1
1
1
Transmit FCS
1
0
0
0
Transmit ED
FS
9h – Fh
Reserved
D4–6
TS(0–2)
Transmit State
TS(0 – 2) represent the current state of the Transmit state machine that
implements the ANSI standard MAC Transmit Functions The encoding is shown below
TS2
TS1
TS0
Transmit State
0
0
0
Idle
0
0
1
Repeat
0
1
0
Data
0
1
1
Issue Token
1
0
0
Claim
1
0
1
Beacon
1
1
0
Reserved
1
1
1
Void
D7
ROP
Ring Operational Flag
Indicates the current value of the local Ring Operational Flag
35



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