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DP83266 bảng dữ liệu(PDF) 82 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
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)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83266 bảng dữ liệu(HTML) 82 Page - National Semiconductor (TI)

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70 Control Information (Continued)
763 Valid Transmission Time (TVX)
The Valid Transmission Timer (TVX) is used to increase the responsiveness of the ring to errors that cause ring recovery The
TVX value denotes the maximum time in which a valid frame or token should be seen by this station TVX is stored as a 4-bit
value that is expanded to a binary exponential value Bits 7 – 4 are ignored during write operations and read as Zero
TVX has a maximum value of 134 seconds with a threshold of 4096 c 2TVX ms On a Master Reset TVX is set to the value of
6h which corresponds to 262 ms the default specified by the FDDI MAC Standard
Access Rules
Address
Read
Write
097h
Always
Stop Mode
Register Bits
D7
D6
D5
D4
D3
D2
D1
D0
TVX
Zero
Zero
Zero
Zero
TVX(3)
TVX(2)
TVX(1)
TVX(0)
TVX(3 – 0)
Time
0
4096 ms
1
8192 ms
2
16384 ms
3
32768 ms
4
65536 ms
5
13107 ms
6
26214 ms (default)
7
52429 ms
8
10486 ms
9
20972 ms
A
41943 ms
B
83886 ms
C
16777 ms
D
33554 ms
E
67109 ms
F
13422
s
82



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