NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 638 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
[9]
PAU
Transmission Paused
The PAU high indicates the next normal packet transmission process will be paused
temporally because EMAC received a PAUSE control frame.
0 = Next normal packet transmission process will go on.
1 = Next normal packet transmission process will be paused.
[8]
DEF
Deferred Transmission
The DEF high indicates the packet transmission has deferred once. The DEF is only
available while EMAC is operating on half-duplex mode.
0 = Packet transmission does not defer.
1 = Packet transmission has deferred once.
[7:4]
CCNT
Collision Count
The CCNT indicates that how many collisions occurred consecutively during a packet
transmission. If the packet incurred 16 consecutive collisions during transmission, the
CCNT will be 4‟h0 and bit TXABT will be set to 1.
[3]
Reserved
Reserved.
[2]
RXFFULL
RXFIFO Full
The RXFFULL indicates the RXFIFO is full due to four 64-byte packets are kept in
RXFIFO and the following incoming packet will be dropped.
0 = The RXFIFO is not full.
1 = The RXFIFO is full and the following incoming packet will be dropped.
[1]
RXHA
Receive Halted
The RXHA high indicates the next normal packet reception process will be halted
because the bit RXON of MCMDR is disabled be S/W.
0 = Next normal packet reception process will go on.
1 = Next normal packet reception process will be halted.
[0]
CFR
Control Frame Received
The CFR high indicates EMAC receives a flow control frame. The CFR only available
while EMAC is operating on full duplex mode.
0 = The EMAC does not receive the flow control frame.
1 = The EMAC receives a flow control frame.