LH79524/LH79525 User’s Guide Ethernet MAC Controller
Version 1.0 6-31
7 TXCOMPLETE
Transmit Complete Denotes a frame has been successfully trans-
mitted. This bit is reset to 0 when read.
1 = Transmit complete
0 = No complete transmit
6 TXBUFEXH
Transmit Buffers Exhausted In Mid-frame The transmit buffers
have run out of data before the transmission of the frame completed.
This bit is reset to 0 when read.
1 = Transmit buffers exhausted mid-frame
0 = No error
5RETRYLIM
Retry Limit Exceeded The programmed retry limit was exceeded
without a successful transmission. This bit is reset to 0 when read.
1 = Retry limit exceeded
0 = No error
4 ETHTXBUFUR
Ethernet Transmit Buffer Underrun The transmit DMA did not fetch
frame data in time for it to be transmitted or response returned ‘Not OK’.
Also 1 if a Used bit is read mid-frame or when a new Transmit Queue
Pointer is written. This bit is reset to 0 when read.
1 = Transmit buffer underrun
0 = No error
3 TXUSDBITRD
Transmit Used Bit Read Indicates that a transmit buffer descriptor
has been read with its Used bit set. This bit is reset to 0 when read.
1 = ‘Used’ bit set
0 = No error
2 RXUSDBITRD
Receive Used Bit Read Set when a receive buffer descriptor is read
with its Used bit set. This bit is reset to 0 when read.
1 = Used bit set
0 = No error
1RXCOMP
Receive Complete A frame has been stored in memory. This bit is
reset to 0 when read.
1 = Receive complete
0 = No receive complete
0 MNGFRMSENT
Management Frame Sent The PHY maintenance register has com-
pleted its operation. This bit is reset to 0 when read.
1 = Management frame sent
0 = No management frame sent
Table 6-21. INSTATUS Fields (Cont’d)
BITS NAME FUNCTION
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