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DP83261 Datasheet(PDF) 127 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) 127 Page - National Semiconductor (TI)

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Appendix A Ring Engine State Machines (Continued)
A22 MAC TRANSMITTER FOOTNOTES
A221 Internal Conditions
(1) ESA
OptionEnable Short Address
(2) ELA
OptionEnable Long Address
(3) IRPT
OptionInhibit Repeat
l (nESA
nELA)
(4)ITC
OptionInhibit Token Capture
(5)IRR
OptionInhibit Recovery Required
l (nESA
nELA)
(6)ITR
OptionInhibit Token Release
(7) IFCS
OptionImplementer FCS
(8) EMIND
OptionExternal Matching Indicators
(9) MAC
Reset
FunctionMAC Reset
l nModeRun
(10) Beacon Request
FunctionBeacon Request
nMAC Reset
(11) Claim
Request
FunctionClaim Request
nBeacon Request
nMAC Reset
A222 Transition Conditions
(1) Usable
Token
Ring Operational
nRQSend
((RQClass e synchronous
nRELRBeacon Received) l
(RQClass e asynchronous
nLate
RQClassCapture e FCrL
(RQClass i priority
l TRT k T Pri RQClassPriority )
n(RQClass e restricted
(RELRBeacon Received
l RELRClaim Received l
(RQClassCapture e nonrestricted
nRbeginOK)))))
(2) Capture
TK
nITC
nIRPT
(Usable Token
l
(Ring Operational
nTELRRing Latency Valid
nLate
nFCrL))
(3) Immediate Request
RQClass e immediate
nRQClaim
nRQBeacon
(4) Usable
Immediate
nRing Operational
TXClass e none
n(TK Received
nIRPT)
nRQSend
Immediate Request
(5) Send
Void
TXAbort
l
(After FSx
((TXReady
(nRQReady
l ((Immediate Request l Lmax expired)
nRQSend)) l
(TXPass
(Void Strip
l (nTELRRing Latency Valid
Early)
l
n(TXED l TXClass 4 none))
127



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