Datasheet
2011 Microchip Technology Inc. DS39762F-page 251
PIC18F97J60 FAMILY
TABLE 19-4: TRANSMIT STATUS VECTORS
Bit 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 Backpressure Applied Reserved, do not use.
49 Transmit Pause Control Frame The frame transmitted was a control frame with a valid pause opcode.
48 Transmit Control Frame The frame transmitted was a 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 Transmit Underrun The transmission was aborted due to insufficient buffer memory
bandwidth to sustain the 10 Mbit/s transmit rate.
30 Transmit Giant Byte count for frame was greater than the MAMXFL registers.
29 Transmit Late Collision Collision occurred after 64 bytes had already been transmitted.
28 Transmit Excessive Collision Packet was aborted after the number of collisions exceeded 15, the
retransmission maximum.
27 Transmit Excessive Defer Packet was deferred in excess of 24,287 bit times (2.4287 ms), due to a
continuously occupied medium.
26 Transmit Packet Defer Packet was deferred for at least one attempt, but less than an
excessive defer.
25 Transmit Broadcast Packet’s destination address was a Broadcast address.
24 Transmit Multicast Packet’s destination address was a Multicast address.
23 Transmit Done Transmission of the packet was completed successfully.
22 Transmit Length Out of Range Indicates that frame type/length field was larger than 1500 bytes
(type field).
21 Transmit Length Check Error Indicates that the frame length field value in the packet does not match
the actual data byte length and is not a type field. The FRMLNEN bit
(MACON3<1>) must be set to get this error.
20 Transmit CRC 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.