MOTOROLA
Chapter 6. Programming Model
6-9
PRELIMINARYÑSUBJECT TO CHANGE WITHOUT NOTICE
and RFINT to notify at the end of frame.
6.2.10 Ethernet Interrupt Vector Register (IVEC)
The Ethernet interrupt vector register (IVEC), shown in Table 6-11, indicates the class of
interrupt generated by the FEC (IVEC) and provides control of the interrupt level
(ILEVEL).
Table 6-10. I_EVENT/I_MASK Field Descriptions
Bits
Name
Description
0
HBERR Heartbeat error. When I_EVENT[HBC] is set, this interrupt indicates that heartbeat was not
detected within the heartbeat window following a transmission.
1
BABR
Babbling receive error. Indicates a received frame exceeded MAX_FRAME_LENGTH bytes. The
hardware truncates receive frames exceeding 2047 bytes so as not to overßow receive buffers.
Note that the Þrst revision of the MPC860T (mask #H56S) must not be given frames in excess of
2047 as it does not truncate frames.
2
BABT
Babbling transmit error. Indicates that the transmitted frame exceeded MAX_FRAME_LENGTH
bytes. This condition is usually caused by too large a a frame being placed into the transmit data
buffers. The transmit frame is not truncated.
3
GRA
Graceful stop complete. A graceful stop initiated by the setting of GTS is complete. GRA is set
when the transmitter Þnishes sending any frame that was in progress when GTS was set.
4
TFINT
Transmit frame interrupt. Indicates that a frame was sent and that the last corresponding BD was
updated.
5
TXB
Transmit buffer interrupt. Indicates that a TxBD was updated.
6
RFINT
Receive frame interrupt. Indicates that a frame was received and that the last corresponding BD
was updated.
7
RXB
Receive buffer interrupt. Indicates that a RxBD was updated.
8
MII
MII interrupt. Indicates that the MII completed the requested data transfer.
9
EBERR Ethernet bus error occurred. Indicates that a bus error occurred when the FEC was accessing the
U bus.
10Ð31
Ñ
Reserved. Should written to zero by the host processor.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..