CX82100 Home Network Processor Data Sheet
7.11.4
EMAC x Status Register (E_Stat_1: 0x00310008 and E_Stat_2: 0x00320008)
E_Stat_1 and E_Stat_2 are the EMAC Status registers for EMAC1 and EMAC2,
respectively. Writing to this register will clear all of its bits (as denoted by RW*).
Bit(s)
Type
Default
Name
E_S_TU
Description
31
RW*
1’b0
Transmit Stopped.
0 = Descriptor ready.
1 = Descriptor not ready.
Receive State.
30:27
26
RW*
RW*
4’b0
1’b0
E_S_RS
E_S_RO
Indicates the receiver MII state (for test only).
Receive FIFO Overflow.
0 = Receive FIFO has not overflowed.
1 = Receive FIFO has overflowed.
Receive Watchdog Time-Out.
25
RW*
1’b0
E_S_RWT
0 = Receive watchdog timer has not expired.
1 = Receive watchdog timer has not expired (based on LAN_WTR).
Transmit Buffer Manager State.
For test only.
24:21
20:17
RW*
RW*
4’b0
4’b0
E_S_TDS
E_S_TS
Transmit State.
Indicates the transmitter state (except during setup frames). For test
only.
16
15
14
RW*
RW*
RW*
1’b0
1’b0
1’b0
E_S_TOF
E_S_TUF
E_S_ED
Transmit FIFO Overflow.
0 = Transmit FIFO has not overflowed.
1 = Transmit FIFO has overflowed.
Transmit FIFO Underflow.
0 = Transmit FIFO has not underflowed.
1 = Transmit FIFO has underflowed.
Excessive Transmit Deferrals.
0 = Deferred longer than 10 Mbps (8192 x 400 ns) while attempting
to transmit.
1 = Deferred longer than 100 Mbps (81920 x 40 ns) while
attempting to transmit.
Deferred Frame.
0 = Current transmit frame has not been deferred at least once.
1 = Current transmit frame has been deferred at least once.
Carrier Done.
13
12
11
RW*
RW*
RW*
1’b0
1’b0
1’b0
E_S_DF
E_S_CD
E_S_ES
0 = Frame transmit not done from MII interface.
1 = Frame transmit done from MII interface.
Transmitter Error Summary.
0 = None of the bits indicated by the 1 state are set.
1 = Any of the following transmit error status bits are set to a 1:
Transmit Fault (E_S_TF), 16+ Collisions (E_S_16), Late
Collision (E_S_LC), No Carrier (E_S_NCRS), Lost Carrier
(E_S_LCRS), or Transmit Jabber Timeout (E_S_TJT).
10
RW*
1’b0
E_S_RLD
Reload Abort.
0 = Transmit FIFO reload/abort has not occurred during current
frame (includes collisions).
1 = Transmit FIFO reload/abort has occurred during current frame
(includes collisions).
101306C
Conexant Proprietary and Confidential Information
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CONEXANT [ CONEXANT SYSTEMS, INC ]
