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DMAx_ES field descriptions (continued)
Field
Description
0
No destination address configuration error
1
The last recorded error was a configuration error detected in the TCDn_DADDR field. TCDn_DADDR
is inconsistent with TCDn_ATTR[DSIZE].
4
DOE
Destination Offset Error
0
No destination offset configuration error
1
The last recorded error was a configuration error detected in the TCDn_DOFF field. TCDn_DOFF is
inconsistent with TCDn_ATTR[DSIZE].
3
NCE
NBYTES/CITER Configuration Error
0
No NBYTES/CITER configuration error
1
The last recorded error was a configuration error detected in the TCDn_NBYTES or TCDn_CITER
fields.
• TCDn_NBYTES is not a multiple of TCDn_ATTR[SSIZE] and TCDn_ATTR[DSIZE], or
• TCDn_CITER[CITER] is equal to zero, or
• TCDn_CITER[ELINK] is not equal to TCDn_BITER[ELINK]
2
SGE
Scatter/Gather Configuration Error
0
No scatter/gather configuration error
1
The last recorded error was a configuration error detected in the TCDn_DLASTSGA field. This field is
checked at the beginning of a scatter/gather operation after major loop completion if TCDn_CSR[ESG]
is enabled. TCDn_DLASTSGA is not on a 32 byte boundary.
1
SBE
Source Bus Error
0
No source bus error
1
The last recorded error was a bus error on a source read
0
DBE
Destination Bus Error
0
No destination bus error
1
The last recorded error was a bus error on a destination write
20.3.7 Enable Request Register (DMAx_ERQ)
The ERQ register provides a bit map for the 8 channels to enable the request signal for
each channel. The state of any given channel enable is directly affected by writes to this
register; it is also affected by writes to the SERQ and CERQ registers. These registers are
provided so the request enable for a single channel can easily be modified without
needing to perform a read-modify-write sequence to the ERQ.
DMA request input signals and this enable request flag must be asserted before a
channel’s hardware service request is accepted. The state of the DMA enable request flag
does not affect a channel service request made explicitly through software or a linked
channel request.
Chapter 20 Enhanced Direct Memory Access (eDMA)
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors
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Содержание K32 L2A Series
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