UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
710 of 1269
NXP Semiconductors
UM10503
Chapter 26: LPC43xx Ethernet
26.6.33 DMA Operation mode register
The Operation Mode register establishes the Transmit and Receive operating modes and
commands. This register should be the last CSR to be written as part of DMA initialization.
15
AIE
Abnormal interrupt summary
Abnormal Interrupt Summary bit value is the logical OR of the following when the
corresponding interrupt bits are enabled in the DMA_INT_EN register:
DMA_STAT register, bit 1: Transmit process stopped
DMA_STAT register, bit 3: Transmit jabber timeout
DMA_STAT register, bit 4: Receive overflow
DMA_STAT register, bit 5: Transmit underflow
DMA_STAT register, bit 7: Receiver buffer unavailable
DMA_STAT register, bit 8: Receive process stopped
DMA_STAT register, bit 9: Receive watchdog timeout
DMA_STAT register, bit 10: Early transmit interrupt
DMA_STAT register, bit 13: Fatal bus error
Only unmasked bits affect the Abnormal Interrupt Summary bit.
This is a sticky bit and must be cleared each time a corresponding bit that causes AIS
to be set is cleared.
0
R/W
16
NIS
Normal interrupt summary
Normal Interrupt Summary bit value is the logical OR of the following when the
corresponding interrupt bits are enabled in the DMA_INT_EN register:
DMA_STAT register, bit 0: Transmit interrupt
DMA_STAT register, bit 2: Transmit buffer unavailable
DMA_STAT register, bit 6: Receive interrupt
DMA_STAT register, bit 14: Early receive interrupt
Only unmasked bits affect the Normal Interrupt Summary bit.
This is a sticky bit and must be cleared (by writing a 1 to this bit) each time a
corresponding bit that causes NIS to be set is cleared.
0
R/W
31:17
-
Reserved
0
RO
Table 566. DMA Status register (DMA_STAT, address 0x4001 1014) bit description
…continued
Bit
Symbol
Description
Reset
value
Access