CP2201 datasheet(50/108 Pages) SILABS

50 / 108 page

CP2200/1

Rev. 1.0

Table 15. Transmit Status Vector Description

Bit

Field Name

Description

Transmitted VLAN Frame

Last frame transmitted had length/type field of 0x8100 (VLAN

protocol Identifier).

Back Pressure Applied

Back pressure was applied during transmission.

Transmitted PAUSE Frame

Last frame transmitted was a valid PAUSE control frame.

Transmitted Control Frame

Last frame transmitted was a control frame.

47-32

Total Bytes Transmitted

Number of bytes transmitted on wire including all bytes from

collided attempts.

Transmit Under-Run

Last packet was aborted due to a data under-run condition.

Jumbo Packet Detected

Last packet was aborted due to the detection of a Jumbo

packet (oversized frame). Jumbo packets are not supported.

Late Collision Detected

Last packet was aborted due to a collision occurring after the

51.2 µs collision window.

Excessive Collisions Detected

Last packet was aborted due to detection of 16 or more colli-

sions.

Excessive Delay Detected

Aborted due to a delay longer than 2.42ms.

Delay Detected

Last packet was transmitted, but had delay (less than 2.42

ms).

Transmitted Broadcast Packet

Last packet transmitted had a broadcast destination address.

Transmitted Multicast Packet

Last packet transmitted had a multicast destination address.

Transmit Successful

Last packet was successfully transmitted.

Type Field Detected

Last packet’s length/type field had a value greater than 1500.

Length Check Error

Last packet’s length/type field had a value less than or equal

to 1500 which did not match the actual frame length.

CRC Error

Last packet’s CRC field did not match the internally generated

CRC.

19-16

Transmit Collision Count

Number of collisions encountered during transmission of the

last packet.

15-0

Transmit Byte Count

Number of bytes in last frame not counting collided bytes.

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