Information

DMA_CR field descriptions (continued)
Field Description
0 Normal operation
1 Stall the start of any new channels. Executing channels are allowed to complete. Channel execution
resumes when this bit is cleared.
4
HOE
Halt On Error
0 Normal operation
1 Any error causes the HALT bit to set. Subsequently, all service requests are ignored until the HALT
bit is cleared.
3
Reserved
This read-only field is reserved and always has the value zero.
2
ERCA
Enable Round Robin Channel Arbitration
0 Fixed priority arbitration is used for channel selection.
1 Round robin arbitration is used for channel selection.
1
EDBG
Enable Debug
0 When in debug mode, the DMA continues to operate.
1 When in debug mode, the DMA stalls the start of a new channel. Executing channels are allowed to
complete. Channel execution resumes when the system exits debug mode or the EDBG bit is cleared.
0
Reserved
This read-only field is reserved and always has the value zero.
21.3.2 Error Status Register (DMA_ES)
The ES provides information concerning the last recorded channel error. Channel errors
can be caused by:
• A configuration error, that is:
• An illegal setting in the transfer-control descriptor, or
• An illegal priority register setting in fixed-arbitration
• An error termination to a bus master read or write cycle
See the Error Reporting and Handling section for more details.
Address: DMA_ES is 4000_8000h base + 4h offset = 4000_8004h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
VLD 0 ECX
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0 CPE 0 ERRCHN SAE SOE DAE
DOE
NCE SGE SBE DBE
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Memory map/register definition
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
344 Freescale Semiconductor, Inc.