Freescale Semiconductor MPC8313E Family Reference Manual page 756

Enhanced Three-Speed Ethernet Controllers
Bits Name
6 GTSC Graceful transmit stop complete. This interrupt is asserted for one of two reasons. Graceful stop means that
the transmitter is put into a pause state after completion of the frame currently being transmitted.
• A graceful stop, which was initiated by setting DMACTRL[GTS], is now complete.
• A transmission of a flow control PAUSE frame, which was initiated by setting TCTRL[TFC_PAUSE], is
now complete.
0 No graceful stop interrupt.
1 Graceful stop requested.
7 BABT Babbling transmit error. This bit indicates that the transmitted frame length has exceeded the value in the
MAC's maximum frame length register and MACCFG2[Huge Frame] is cleared. Frame truncation occurs
when this condition occurs.
0 Transmitted frame length not exceeding maximum frame length.
1 Transmitted frame length exceeding maximum frame length when MACCFG2[Huge Frame] = 0.
8 TXC Transmit control interrupt. This bit indicates that a control frame was transmitted.
0 Control frame not transmitted.
1 Control frame transmitted.
9 TXE Transmit error. This bit indicates that an error occurred on the transmitted channel that has caused
TSTAT[THLT] to be set by the eTSEC. This bit is set whenever any transmit error occurs that causes the
transmitter to halt (EBERR, LC, CRL, XFUN).
0 No transmit channel error occurred.
1 Transmit channel error occurred.
10 TXB Transmit buffer. This bit indicates that a transmit buffer descriptor was updated whose I (interrupt) bit was
set in its status word and was not the last buffer descriptor of the frame.
0 No transmit buffer descriptor updated.
1 Transmit buffer descriptor updated.
11 TXF Transmit frame interrupt. This bit indicates that a frame was transmitted and that the last corresponding
transmit buffer descriptor (TxBD) was updated. This only occurs if the I (interrupt) bit in the status word of
the buffer descriptor is set. The specific transmit queue that was updated has its TXF bit set in TSTAT.
0 No frame transmitted/TxBD not updated.
1 Frame transmitted/TxBD updated.
12 — Reserved
13 LC Late collision. This bit indicates that a collision occurred beyond the collision window (slot time) in
half-duplex mode. The frame is truncated with a bad CRC and the remainder of the frame is discarded.
0 No late collision occurred.
1 Late collision occurred.
14 CRL Collision retry limit. This bit indicates that the number of successive transmission collisions has exceeded
the MAC's half-duplex register's retransmission maximum count (HAFDUP[Retransmission Maximum]).
The frame is discarded without being transmitted and the queue halts (TSTAT[THLT n ] set to 1). This only
occurs while in half-duplex mode.
0 Successive transmission collisions do not exceed maximum.
1 Successive transmission collisions exceed maximum.
15 XFUN Transmit FIFO underrun. This bit indicates that the transmit FIFO became empty before the complete frame
was transmitted.
0 Transmit FIFO not underrun.
1 Transmit FIFO underrun.
16 RXB Receive buffer. This bit indicates that a receive buffer descriptor was updated which had the I (Interrupt) bit
set in its status word and was not the last buffer descriptor of the frame.
0 Receive buffer descriptor not updated.
1 Receiver buffer descriptor updated.
MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3
15-26
Table 15-8. IEVENT Field Descriptions (continued)
Description
Freescale Semiconductor