K60P100M100SF2RM Datasheet, PDF (459/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 21 Direct Memory Access Controller (eDMA)
21.3.8 Set Enable Request Register (DMA_SERQ)
The SERQ provides a simple memory-mapped mechanism to set a given bit in the ERQ
to enable the DMA request for a given channel. The data value on a register write causes
the corresponding bit in the ERQ to be set. Setting the SAER bit provides a global set
function, forcing the entire contents of ERQ to be set. 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: DMA_SERQ is 4000_8000h base + 1Bh offset = 4000_801Bh
Bit
7
6
5
4
3
2
1
0
Read
0
0
0
Write
NOP
SAER
0
SERQ
Reset
0
0
0
0
0
0
0
0
DMA_SERQ field descriptions
Field
7
NOP
6
SAER
5–4
Reserved
3–0
SERQ
Description
0 Normal operation
1 No operation, ignore the other bits in this register
Set All Enable Requests
0 Set only the ERQ bit specified in the SERQ field
1 Set all bits in ERQ
This field is reserved.
Set enable request
Sets the corresponding bit in ERQ
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
459