Ethernet Interrupt Event Register (Eir); Eir Field Descriptions - Motorola ColdFire MCF5281 User Manual

Programming Model
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
Field HBERR BABR BABT GRA TXF TXB RXF RXB MII EBERR LC
Reset
R/W
15
Field
Reset
R/W
Address
Figure 17-4. Ethernet Interrupt Event Register (EIR)
Bits
31
30
29
17-24
29 28 27 26
0000_0000_0000_0000
0000_0000_0000_0000
IPSBAR + 0x1004
Table 17-12. EIR Field Descriptions
Name
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.
BABR Babbling receive error. This bit indicates a frame was received with
length in excess of RCR[MAX_FL] bytes.
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.
MCF5282 User's Manual
25 24 23 22
R/W
—
R/W
Description
21 20 19 18 16
RL UN —
0
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