NXP Semiconductors MPC5566, Reference Manual

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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)