MII_DATA -. ST (Start of Frame Delimiter) ( ST:= 01). OP (Operation Code) ( = 10 , = 01 ). PHY-, .
860 32 PHY-. RA 32 PHY-, . (Turn Around) , := 10. DATA , / . ST, 802.3.
MII_SPEED (. 5.138) , MDC ( Clock). / .
, PHY- . DIS_PREAMBLE = 1, 32 . , .
MII_SPEED MDC. MDC- [( 4acTOTa)/(MII_SPEEDx2)]. MII_SPEED = 0, MDC . 2,5 , Mil- IEEE.
FEC-. FEC- . FEC- , , , . W = 1 (Wrap).
R = 1 (Ready) = 1 (Empty) . X_DES_ACTIVE R_DES_ACTIVE , FEC-, . R , .
. . 5.139.
(Empty) 1 , , . := 0 FEC- .
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RO1 RO2 (Receive Software Ownership) .
W (Wrap), , FEC-, - BD
L (Last) , , ( L = 1). .
(Miss) 1 FEC-, ( promiscuous). = 0, , .
1, (broadcast).
1, ( ) (multicast).
LG (Lenght Violation) 1, , , FEC- . , 2047 .
TR , 2047 , .
NO (Nonoctet Aligned Frame) 1, , 8 , CRC.
SH (Short Frame) 1, , FEC- .
CR (CRC Error) , , 8 .
OV (Overrun), 1, , FIFO . OV = 1, .
. . 5.140.
R (Ready) , . FEC- (R:= 0) .
1 2 (Transmit Software Ownership) .
W (Wrap), 1, FEC-, - BD .
L (Last) , , ( L = 1).
( L = 1) =1 ( CRC), . = 0, .
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( L = 1) DEF = 1 (Defer Indication), . , .
( L = 1) = 1 (Heartbeat Error), , . . . , X_CNTRL = 1.
( L = 1) LC = 1 (Lata Collision), , 56 ( ), .
( L = 1) RL = 1 (Retransmission Limit), - . RC (Retry Count).
( L = 1) UN (Underrun), 1, , , , FIFO, SDMA. , .
( L = 1) CSL (Carrier Sence Lost), , . . (, ), .