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Enhanced Direct Memory Access (eDMA)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
9-15
9.2.2.5
eDMA Set Enable Request Register (EDMA_SERQR)
The EDMA_SERQR provides a simple memory-mapped mechanism to set a given bit in the
EDMA_ERQRH or EDMA_ERQRL to enable the DMA request for a given channel. The data value on
a register write causes the corresponding bit in the EDMA_ERQRH or EDMA_ERQRL to be set. Setting
bit 1 (SERQ
n
) provides a global set function, forcing the entire contents of EDMA_ERQRH and
EDMA_ERQRL to be asserted. Reads of this register return all zeroes.
9.2.2.6
eDMA Clear Enable Request Register (EDMA_CERQR)
The EDMA_CERQR provides a simple memory-mapped mechanism to clear a given bit in the
EDMA_ERQRH or EDMA_ERQRL to disable the DMA request for a given channel. The data value on
a register write causes the corresponding bit in the EDMA_ERQRH or EDMA_ERQRL to be cleared.
Setting bit 1 (CERQ
n
) provides a global clear function, forcing the entire contents of the EDMA_ERQRH
and EDMA_ERQRL to be zeroed, disabling all DMA request inputs. Reads of this register return all
zeroes.
Table 9-5. EDMA_EEIRH, EDMA_EEIRL Field Descriptions
Field
Description
0–63
EEI
n
Enable error interrupt
n.
0 The error signal for channel
n
does not generate an error interrupt.
1 The assertion of the error signal for channel
n
generate an error interrupt request.
Address: Base + 0x0018
Access: User W/O
0
1
2
3
4
5
6
7
R
0
0
0
0
0
0
0
0
W
SERQ[0:6]
Reset
0
0
0
0
0
0
0
0
Figure 9-8. eDMA Set Enable Request Register (EDMA_SERQR)
Table 9-6. EDMA_SERQR Field Descriptions
Field
Descriptions
0
Reserved
1–7
SERQ[0:6]
Set enable request.
0–63 Set corresponding bit in EDMA_ERQRH or EDMA_ERQRL
64–127 Set all bits in EDMA_ERQRH and EDMA_ERQRL
Address: Base + 0x0019
Access: User W/O
0
1
2
3
4
5
6
7
R
0
0
0
0
0
0
0
0
W
CERQ[0:6]
Reset
0
0
0
0
0
0
0
0
Figure 9-9. eDMA Clear Enable Request Register (EDMA_CERQR)
Содержание MPC5566
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