dp83261 National Semiconductor Corporation, dp83261 Datasheet - Page 130

• Manufacturer Part Number: dp83261
• Description: Bmac Device Fddi Media Access Controller
• Manufacturer: National Semiconductor Corporation

Appendix A Ring Engine State Machines
(4) Repeat Actions (T1)
(5) TX Data Actions (T2)
(6) Issue TK Actions (T3)
(7) Claim TK Actions (T4)
(8) TX Beacon Actions (T5)
(9) TX Void Actions (T7)
IF Lmax 4 expired
IF nRQ Ready
IF Abort
After ED
Always
CLEAR Function Claim Request
CLEAR Function Beacon Request
Always
IF nIRPT
Still Usable
THEN RESET Lmax
THEN RESET Lmax
THEN SET TX Abort
SET TX ED
IF Still Usable
IF My Void
IF My Void
(Ring Operational
IF Still Usable
THEN SET TX Ready
ELSE SET TX Pass
THEN CLEAR Void Strip
THEN CLEAR Void Strip
THEN SET TX Class 4 none
SET T Opr 4 T Max
IF Ring Operational
Ring Operational
((RQ Class 4 synchronous
(RQ Class 4 asynchronous
(RQ Class
n(RQ Class 4 restricted
(Higher Claim
(RELR Beacon Received
(RQ Class Capture 4 nonrestricted
RQ Ready
THEN SET RELR Ring Operational Reset
Vsent
THEN SET TX Ready
ELSE SET TX Pass
SET Used
CLEAR Used
l
i
TX Class
CLEAR Late Count
priority
l
Other Beacon
RESET TRT 4 T Opr
nRQ Send
i
l
TRT
none
l
RELR Claim Received
nRELR Beacon Received)
k
130
nLate
l
nLate)
l
Other MAC)
T Pri RQ Class Priority )
Ring Operational
(Continued)
RQ Capture 4 FCr L
SET Late
nRbeginOK)))))
l
l