Enhanced Direct Memory Access (eDMA)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
9-39
9.4.4
DMA Arbitration Mode Considerations
9.4.4.1
Fixed-Group Arbitration and Fixed-Channel Arbitration
In this mode, the channel service request from the highest priority channel in the highest priority group is
selected to execute. If the eDMA is programmed so the channels within one group use ‘fixed’ priorities,
and that group is assigned the highest ‘fixed’ priority of all groups, it is possible for that group to take all
the bandwidth of the eDMA controller; that is, no other groups is serviced if there is always at least one
eQADC_FISR4_RFDF4
9
EQADC.FISR4[RFDF4]
eQADC Receive FIFO 4 Drain Flag
eQADC_FISR5_CFFF5
10
EQADC.FISR5[CFFF5]
eQADC Command FIFO 5 Fill Flag
eQADC_FISR5_RFDF5
11
EQADC.FISR5[RFDF5]
eQADC Receive FIFO 5 Drain Flag
DSPIB_SR_TFFF
12
DSPIB.SR[TFFF]
DSPIB Transmit FIFO Fill Flag
DSPIB_SR_RFDF
13
DSPIB.SR[RFDF]
DSPIB Receive FIFO Drain Flag
DSPIC_SR_TFFF
14
DSPIC.SR[TFFF]
DSPIC Transmit FIFO Fill Flag
DSPIC_SR_RFDF
15
DSPIC.SR[RFDF]
DSPIC Receive FIFO Drain Flag
DSPID_SR_TFFF
16
DSPID.SR[TFFF]
DSPID Transmit FIFO Fill Flag
DSPID_SR_RFDF
17
DSPID.SR[RFDF]
DSPID Receive FIFO Drain Flag
eSCIA_COMBTX
18
ESCIA.SR[TDRE] ||
ESCIA.SR[TC] ||
ESCIA.SR[TXRDY]
eSCIA combined DMA request of the Transmit Data
Register Empty, Transmit Complete, and LIN Transmit
Data Ready DMA requests
eSCIA_COMBRX
19
ESCIA.SR[RDRF] ||
ESCIA.SR[RXRDY]
eSCIA combined DMA request of the Receive Data
Register Full and LIN Receive Data Ready DMA
requests
eMIOS_GFR_F0
20
EMIOS.GFR[F0]
eMIOS channel 0 Flag
eMIOS_GFR_F1
21
EMIOS.GFR[F1]
eMIOS channel 1 Flag
eMIOS_GFR_F2
22
EMIOS.GFR[F2]
eMIOS channel 2 Flag
eMIOS_GFR_F3
23
EMIOS.GFR[F3]
eMIOS channel 3 Flag
eMIOS_GFR_F4
24
EMIOS.GFR[F4]
eMIOS channel 4 Flag
eMIOS_GFR_F8
25
EMIOS.GFR[F8]
eMIOS channel 8 Flag
eMIOS_GFR_F9
26
EMIOS.GFR[F9]
eMIOS channel 9 Flag
eTPU_CDTRSR_A_DTRS0
27
ETPU.CDTRSR_A[DTRS0]
eTPUA Channel 0 Data Transfer Request Status
eTPU_CDTRSR_A_DTRS1
28
ETPU.CDTRSR_A[DTRS1]
eTPUA Channel 1 Data Transfer Request Status
eTPU_CDTRSR_A_DTRS2
29
ETPU.CDTRSR_A[DTRS2]
eTPUA Channel 2 Data Transfer Request Status
eTPU_CDTRSR_A_DTRS14
30
ETPU.CDTRSR_A[DTRS14]
eTPUA Channel 14 Data Transfer Request Status
eTPU_CDTRSR_A_DTRS15
31
ETPU.CDTRSR_A[DTRS15]
eTPUA Channel 15 Data Transfer Request Status
Table 9-23. DMA Request Summary for eDMA (continued)
DMA Request
Channel
Source
Description
Содержание MPC5565
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