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Chapter 16 Enhanced Direct Memory Access (eDMA)
MPC5606BK Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
261
16.3.2.3
DMA Enable Request (EDMA_ERQRL)
The EDMA_ERQRL provides a bit map for the 16 channels to enable the request signal for each channel.
EDMA_ERQRL maps to channels 15–0.
The state of any given channel enable is directly affected by writes to this register; the state is also affected
by writes to the EDMA_SERQR, and EDMA_CERQR registers. The EDMA_CERQR and
EDMA_SERQR registers are provided so the request enable for a single channel can be modified without
performing a read-modify-write sequence to the EDMA_ERQRL register.
Both the eDMA request input signal and this enable request flag must be asserted before a channel’s
hardware service request is accepted. The state of the eDMA enable request flag does not affect a channel
service request made through software or a linked channel request.
DAE
Destination Address Error
0 No destination address configuration error.
1 The last recorded error was a configuration error detected in the TCD.daddr field.
TCD.daddr is inconsistent with TCD.dsize.
DOE Destination
Offset
Error
0 No destination offset configuration error.
1 The last recorded error was a configuration error detected in the TCD.doff field. TCD.doff
is inconsistent with TCD.dsize.
NCE Nbytes/Citer
Configuration Error
0 No nbytes/citer configuration error.
1 The last recorded error was a configuration error detected in the TCD.nbytes or TCD.citer
fields. TCD.nbytes is not a multiple of TCD.ssize and TCD.dsize, or TCD.citer is equal to
zero, or TCD.citer.e_link is not equal to TCD.biter.e_link.
SGE
Scatter/Gather Configuration Error
0 No scatter/gather configuration error.
1 The last recorded error was a configuration error detected in the TCD.dlast_sga field.
This field is checked at the beginning of a scatter/gather operation after major loop
completion if TCD.e_sg is enabled. TCD.dlast_sga is not on a 32 byte boundary.
SBE Source
Bus
Error
0 No source bus error.
1 The last recorded error was a bus error on a source read.
DBE
Destination Bus Error
0 No destination bus error.
1 The last recorded error was a bus error on a destination write.
Table 16-3. EDMA_ESR field descriptions (continued)
Field
Description
Summary of Contents for MPC5605BK
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