ENC28J60
TABLE 7-1:
Bit
TRANSMIT STATUS VECTORS
Field
Description
55-52 Zero
0
51
Transmit VLAN Tagged Frame
Frame’s length/type field contained 8100h which is the VLAN protocol
identifier.
50
49
48
Backpressure Applied
Carrier sense method backpressure was previously applied.
The frame transmitted was a control frame with a valid pause opcode.
The frame transmitted was a control frame.
Transmit Pause Control Frame
Transmit Control Frame
47-32 Total Bytes Transmitted on Wire Total bytes transmitted on the wire for the current packet, including all
bytes from collided attempts.
31
30
29
28
Transmit Underrun
Reserved. This bit will always be ‘0’.
Transmit Giant
Byte count for frame was greater than MAMXFL.
Collision occurred beyond the collision window (MACLCON2).
Transmit Late Collision
Transmit Excessive Collision
Packet was aborted after the number of collisions exceeded the
retransmission maximum (MACLCON1).
27
26
Transmit Excessive Defer
Transmit Packet Defer
Packet was deferred in excess of 24,287 bit times (2.4287ms).
Packet was deferred for at least one attempt but less than an excessive
defer.
25
24
23
22
Transmit Broadcast
Transmit Multicast
Packet’s destination address was a broadcast address.
Packet’s destination address was a multicast address.
Transmission of the packet was completed.
Transmit Done
Transmit Length Out of Range
Indicates that frame type/length field was larger than 1500 bytes (type
field).
21
20
Transmit Length Check Error
Transmit CRC Error
Indicates that frame length field value in the packet does not match the
actual data byte length and is not a type field. MACON3.FRMLNEN
must be set to get this error.
The attached CRC in the packet did not match the internally generated
CRC.
19-16 Transmit Collision Count
Number of collisions the current packet incurred during transmission
attempts. It applies to successfully transmitted packets and as such, will
not show the possible maximum count of 16 collisions.
15-0
Transmit Byte Count
Total bytes in frame not counting collided bytes.
© 2006 Microchip Technology Inc.
Preliminary
DS39662B-page 41
MICROCHIP [ MICROCHIP ]
