RM0082
HS_Media independent interface (MII)
Doc ID 018672 Rev 1
533/844
24.7.11
Missed frame and buffer overflow counter register (Register8, DMA)
The Missed Frame And Buffer Overflow Counter is a register which reports the current value
of the two counters maintained by DMA Controller to track the number of missed frames
during reception.
As stated in the bit assignments given in
, bits [15:0] indicate the number of
missed frames due to the host buffer being unavailable, and bits [27:17] indicate the number
of missed frames due to buffer overflow conditions.
24.7.12
Current host transmit descriptor register (Register18, DMA)
The Current Host Transmit Descriptor is a RO register which points to the start address of
the current transmit descriptor read by the DMA. This pointer is updated by DMA during
operation.
[13]
FBE
1’h0
RW
Fatal bus error interrupt enable.
[12:11]
Reserved
-
RO
Read: undefined.
[10]
ETE
1’h0
RW
Early transmit interrupt enable.
[09]
RWE
1’h0
RW
Receive watchdog timeout enable.
[08]
RSE
1’h0
RW
Receive stopped enable.
[07]
RUE
1’h0
RW
Receive buffer unavailable enable.
[06]
RIE
1’h0
RW
Receive interrupt enable.
[05]
UNE
1’h0
RW
Underflow interrupt enable.
[04]
OVE
1’h0
RW
Overflow interrupt enable.
[03]
TJE
1’h0
RW
Transmit jabber timeout enable.
[02]
TUE
1’h0
RW
Transmit buffer unavailable enable.
[01]
TSE
1’h0
RW
Transmit stopped enable.
[00]
TIE
1’h0
RW
Transmit interrupt enable.
Table 441.
Interrupt enable register bit assignments (continued)
Bit
Name
Reset value
Type
Description
Table 442.
Missed frame and buffer overflow counter register bit assignments
Bit
Name
Reset Value
Type
Description
[31:29]
Reserved -
RO
Read:
undefined
[28]
-
1’h0
RW
Overflow for FIFO Overflow Counter
[27:17]
-
11’h0
RW
Number of frames missed by the application
[16]
-
1’h0
RW
Overflow for Missed Frame Counter.
[15:00]
-
16’h0
RW
Number of frames missed by the controller.