Motorola MCF5281 사용자 설명서

17-24

MOTOROLA

 

in the network or transceiver are HBERR, BABR, BABT, LC and RL. Interrupts resulting
from internal errors are HBERR and UN.

Some of the error interrupts are independently counted in the MIB block counters. Software
may choose to mask off these interrupts since these errors will be visible to network
management via the MIB counters.

• HBERR - IEEE_T_SQE
• BABR - RMON_R_OVERSIZE (good CRC), RMON_R_JAB (bad CRC)
• BABT - RMON_T_OVERSIZE (good CRC), RMON_T_JAB (bad CRC)
• LATE_COL - IEEE_T_LCOL
• COL_RETRY_LIM - IEEE_T_EXCOL
• XFIFO_UN - IEEE_T_MACERR

31

30

29

28

27

26

25

24

23

22

21

20

19

18

16

Field HBERR BABR BABT GRA TXF TXB RXF RXB MII EBERR LC

RL

UN

—

Reset

0000_0000_0000_0000

R/W

R/W

15

0

Field

—

Reset

0000_0000_0000_0000

R/W

R/W

Address

IPSBAR + 0x1004

31

HBERR

Heartbeat error. This interrupt indicates that HBC is set in the TCR 
register and that the COL input was not asserted within the 
Heartbeat window following a transmission.

30

BABR

Babbling receive error. This bit indicates a frame was received with 
length in excess of RCR[MAX_FL] bytes.

29

BABT

Babbling transmit error. This bit indicates that the transmitted 
frame length has exceeded RCR[MAX_FL] bytes. This condition is 
usually caused by a frame that is too long being placed into the 
transmit data buffer(s). Truncation does not occur.