DMA_SERQ field descriptions
Field
Description
7
NOP
No Op enable
0
Normal operation
1
No operation, ignore the other bits in this register
6
SAER
Set All Enable Requests
0
Set only the ERQ bit specified in the SERQ field
1
Set all bits in ERQ
5–4
Reserved
This field is reserved.
SERQ
Set Enable Request
Sets the corresponding bit in ERQ.
12.3.13 Clear DONE Status Bit Register (DMA_CDNE)
The CDNE provides a simple memory-mapped mechanism to clear the DONE bit in the
TCD of the given channel. The data value on a register write causes the DONE bit in the
corresponding transfer control descriptor to be cleared. Setting the CADN bit provides a
global clear function, forcing all DONE bits to be cleared. If the NOP bit is set, the
command is ignored. This allows you to write multiple-byte registers as a 32-bit word.
Reads of this register return all zeroes.
Address: 4000_8000h base + 1Ch offset = 4000_801Ch
Bit
7
6
5
4
3
2
1
0
Read
0
0
0
Write
Reset
0
0
0
0
0
0
0
0
DMA_CDNE field descriptions
Field
Description
7
NOP
No Op enable
0
Normal operation
1
No operation, ignore the other bits in this register
6
CADN
Clears All DONE Bits
0
Clears only the TCDn_CSR[DONE] bit specified in the CDNE field
1
Clears all bits in TCDn_CSR[DONE]
5–4
Reserved
This field is reserved.
Table continues on the next page...
Memory map/register definition
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
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NXP Semiconductors
Содержание KE1xF Series
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