UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
716 of 1269
NXP Semiconductors
UM10503
Chapter 26: LPC43xx Ethernet
26.6.36 DMA Receive interrupt watchdog timer register
This register, when written with non-zero value, will enable the watchdog timer for RI (bit 6
in the DMA_STAT register).
Table 569. DMA Missed frame and buffer overflow counter register (DMA_MFRM_BUFOF,
address 0x4001 1020) bit description
Bit
Symbol
Description
Reset
value
Access
15:0
FMC
Number of frames missed
This register field can be read by the application (Read),
can be set to 1 by the Ethernet core on a certain internal
event (Self Set), and is automatically cleared to 0 on a
register read. A register write of 0 has no effect on this
field.
Indicates the number of frames missed by the controller
due to the Host Receive Buffer being unavailable. This
counter is incremented each time the DMA discards an
incoming frame. The counter is cleared when this register
is read with.
0
RO
16
OC
Overflow bit for missed frame counter
This register field can be read by the application (Read),
can be set to 1 by the Ethernet core on a certain internal
event (Self Set), and is automatically cleared to 0 on a
register read. A register write of 0 has no effect on this
field.
0
RO
27:17
FMA
Number of frames missed by the application
This register field can be read by the application (Read),
can be set to 1 by the Ethernet core on a certain internal
event (Self Set), and is automatically cleared to 0 on a
register read. A register write of 0 has no effect on this
field.
Indicates the number of frames missed by the application.
This counter is incremented each time the MTL asserts
the sideband signal. The counter is cleared when this
register is read with <tbd>.
0
RO
28
OF
Overflow bit for FIFO overflow counter
This register field can be read by the application (Read),
can be set to 1 by the Ethernet core on a certain internal
event (Self Set), and is automatically cleared to 0 on a
register read. A register write of 0 has no effect on this
field.
0
RO
31:29
-
Reserved
0
RO