CX82100 Home Network Processor Data Sheet
7.7.3
Transmit Status (TSTAT)
The contents of the Transmit Status (TSTAT) are described in Table 7-3.
Table 7-3. Transmit Status Format
Bit(s)
Default
Type
Name
Description
31
1’b0
TDN
TU
Transmit Completed.
0 = Transmit not completed successfully.
1 = Transmit completed successfully (from buffer manager).
Transmit Stopped.
30
1’b0
4’b0
0 = Transmit not stopped.
1 = Transmit stopped (descriptor not ready).
Unused.
29:21
20:17
TS
Transmit State.
0 = MII transmitter state inactive.
1 = MII transmitter state active (except during setup frames).
For test only.
16
15
14
1’b0
1’b0
1’b0
**
**
**
TOF
TUF
ED
Transmit Buffer Manager FIFO Overflow.
0 = Transmit buffer manager FIFO overflow has not occurred
(MIB11).
1 = Transmit buffer manager FIFO overflow has occurred.
Transmit Buffer Manager FIFO Underflow.
0 = Transmit buffer manager FIFO underflow has not occurred
(MIB11).
1 = Transmit buffer manager FIFO underflow has occurred (MIB11).
Excessive Transmit Deferrals.
0 = Excessive deferral did not occur.
1 = The HNP is attempting to transmit and is deferred longer than:
10 Mbps: 8192 x 400 ns
100 Mbps: 81920 x 40 ns
Frame Deferred.
0 = Frame has not been deferred at least once (MIB8).
1 = Frame has been deferred at least once (MIB8).
Frame Transmit Completed.
13
12
11
1’b0
1’b0
1’b0
**
*, **
**
DF
CD
ES
0 = Frame transmit not completed successfully (from MII interface).
1 = Frame transmit completed successfully (from MII interface).
Transmit Error Summary.
0 = Frame has not been deferred at least once (MIB8).
1 = Transmitter error summary (TF or C16 or LC or NCRS or LCRS
or TJT).
10
9
1’b0
1’b0
**
RLD
TF
Reload.
0 = Frame has not been deferred at least once (MIB8).
1 = Transmit FIFO reload/abort during frame (includes collisions).
Transmit Fault (from MII Interface).
*, **
0 = Unexpected transmit data request during frame has not
occurred.
1 = Unexpected transmit data request during frame has occurred.
Transmit Jabber Timeout.
8
1’b0
TJT
0 = Jabber timer not expired.
1 = Jabber timer expired.
E_NA_HUJ and E_NA_HUJ must be configured for this bit to function.
7-12
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