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DP83261 Datasheet(PDF) 68 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83261
Description  BMAC Device (FDDI Media Access Controller)
PDF  132 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83261 Datasheet(HTML) 68 Page - National Semiconductor (TI)

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60 Control Information (Continued)
Token Received Counter (TKCT)
The Token Received Counter (TKCT) maintains the count of valid tokens received by this station The counter can be used with
the Ring Latency Counter to calculate the average network load over a period of time The frequency of token arrival is inversely
related to the network load
The Token Received Counter is incremented every time a valid token arrives
Interrupts are available on increment (CILRTKRCVD) and when the 20-bit counter overflows and wraps around
(COLRTKRCVD)
ACCESS RULES
Address
Read
Write
B8 – BBh
Always
Stop Mode
D7
D6
D5
D4
D3
D2
D1
D0
TKCT0
Zero
Zero
Zero
Zero
Zero
Zero
Zero
Zero
TKCT1
Zero
Zero
Zero
Zero
CT(19)
CT(18)
CT(17)
CT(16)
TKCT2
CT(15)
CT(14)
CT(13)
CT(12)
CT(11)
CT(10)
CT(9)
CT(8)
TKCT3
CT(7)
CT(6)
CT(5)
CT(4)
CT(3)
CT(2)
CT(1)
CT(0)
68



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