K60P100M100SF2RM Datasheet, PDF (1137/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Field
31
Reserved
30
BABR
29
BABT
28
GRA
27
TXF
26
TXB
25
RXF
24
RXB
23
MII
22
EBERR
21
LC
20
RL
19
UN
Chapter 44 10/100-Mbps Ethernet MAC (ENET)
ENET_EIR field descriptions
Description
This read-only field is reserved and always has the value zero.
Babbling Receive Error
Indicates a frame was received with length in excess of RCR[MAX_FL] bytes.
Babbling Transmit Error
Indicates the transmitted frame length exceeds RCR[MAX_FL] bytes. Usually this condition is caused
when a frame that is too long is placed into the transmit data buffer(s). Truncation does not occur.
Graceful Stop Complete
This interrupt is asserted after the transmitter is put into a pause state after completion of the frame
currently being transmitted. See Graceful Transmit Stop (GTS) for conditions that lead to graceful stop.
NOTE: The GRA interrupt is asserted only when the TX transitions into the stopped state. If this bit is
cleared (by writing 1) and the TX is still stopped, the bit is not set again.
Transmit Frame Interrupt
Indicates a frame has been transmitted and the last corresponding buffer descriptor has been updated.
Transmit Buffer Interrupt
Indicates a transmit buffer descriptor has been updated.
Receive Frame Interrupt
Indicates a frame has been received and the last corresponding buffer descriptor has been updated.
Receive Buffer Interrupt.
Indicates a receive buffer descriptor not the last in the frame has been updated.
MII Interrupt.
Indicates the MII has completed the data transfer requested.
Ethernet Bus Error
Indicates a system bus error occurred when a uDMA transaction is underway. (When this bit is set,
ECR[ETHER_EN] is cleared, halting frame processing by the MAC. When this occurs, software must
ensure proper actions (possibly resetting the system) to resume normal operation.
Late Collision
Indicates a collision occurred beyond the collision window (slot time) in half-duplex mode. The frame
truncates with a bad CRC and the remainder of the frame is discarded.
Collision Retry Limit.
Indicates a collision occurred on each of 16 successive attempts to transmit the frame. The frame is
discarded without being transmitted and transmission of the next frame commences. This error can only
occur in half duplex mode.
Transmit FIFO underrun
Indicates the transmit FIFO became empty before the complete frame was transmitted. A bad CRC is
appended to the frame fragment and the remainder of the frame is discarded.
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1137