Sharp LH79524 User Manual page 187

Ethernet MAC Controller
BITS
4
3
2
1
0
6-26
Table 6-13. TXSTATUS Fields (Cont'd)
NAME
Buffers Exhausted Mid-Frame If the buffers run out of data during
transmission of a frame, transmission stops. When this happens, FCS is
bad and the Transmit Error (ETHERTXER) pin is asserted.
Read:
BUFEX 1 = Buffer exhausted mid-frame
0 = Normal operation
Write:
1 = Reset bit to 0
0 = No effect
Transmit Go Indicates that transmit is active.
Read:
1 = Transmit is active
TXGO 0 = Transmit is not active
Write:
1 = Reset bit to 0
0 = No effect
Retry Limit Exceeded Indicates that the transmission retry limit was
exceeded.
Read:
1 = Retry limit exceeded
RETRYLIMIT
0 = Normal operation
Write:
1 = Reset bit to 0
0 = No effect
Collision Occurred Indicates that a collision occurred.
Read:
1 = Collision occurred
COLLISION 0 = Normal operation
Write:
1 = Reset bit to 0
0 = No effect
Used Bit Read Indicates that a Transmit Buffer Descriptor is read with
its Used bit set.
Read:
1 = A transmit buffer description Used bit was set
USEDBIT
0 = Normal operation
Write:
1 = Reset bit to 0
0 = No effect
FUNCTION
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LH79524/LH79525 User's Guide