GT-96100A Advanced Communication Controller
Revision 1.0
297
2
TxBufferHigh
Tx Buffer for High priority Queue
Indicates a Tx buffer returned to CPU ownership or that the
port finished transmission of a Tx frame.
NOTE: This bit is set upon closing any Tx descriptor which
has its EI bit set. In order to limit the interrupts to
frame (rather than buffer) boundaries, the user
should set EI only in the last descriptor.
0
3
TxBufferLow
Tx Buffer for Low Priority Queue
Indicates a Tx buffer returned to CPU ownership or that the
port finished transmission of a Tx frame.
NOTE: This bit is set upon closing any Tx descriptor which
has its EI bit set. In order to limit the interrupts to
frame (rather than buffer) boundaries, the user
should set EI only in the last descriptor.
0
5:4
Reserved
Reserved.
0
6
TxEndHigh
Tx End for High Priority Queue
Indicates that the Tx DMA stopped processing the high prior-
ity queue after stop command, or that it reached the end of
the high priority descriptor chain.
0
7
TxEndLow
Tx End for Low Priority Queue
Indicates that the Tx DMA stopped processing the low prior-
ity queue after stop command, or that it reached the end of
the low priority descriptor chain.
0
8
RxError
Rx Resource Error
Indicates a Rx resource error event in either priority queues.
NOTE: In order to get a Rx Resource Error Indication per
priority queue, use bit 23:20. event
0
9
Reserved
Reserved.
0
10
TxErrorHigh
Tx Resource Error for High Priority Queue
Indicates a Tx resource error event during packet transmis-
sion from the high priority queue.
0
11
TxErrorLow
Tx Resource Error for Low Priority Queue
Indicates a Tx resource error event during packet transmis-
sion from the low priority queue.
0
12
RxOVR
Rx Overrun
Indicates an overrun event that occured during reception of a
packet.
0
13
TxUdr
Tx Underrun
Indicates an underrun event that occured during transmis-
sion of packet from either queue.
0
Table 298: Interrupt Cause Register (ICR), Offset: 0x084850 for
Ethernet_0; 0x088850 for Ethernet_1 (Continued)
Bits
F ield Name
Function
Initial Valu e