MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
9-40
Freescale Semiconductor
If priority levels are not unique, the highest (channel/group) priority that has an active request will be
selected, but the lowest numbered (channel/group) with that priority will be selected by arbitration and
executed by the eDMA engine. The hardware service request handshake signals, error interrupts and error
reporting will be associated with the selected channel.
9.5.3
DMA Request Assignments
The assignments between the DMA requests from the modules to the channels of the eDMA are shown in
. The source column is written in C language syntax. The syntax is
module_instance.register[bit].
Note that the MPC5554 has 64 channels but the MPC5553 has 32 channels, and in
0-31 function for both the MPC5553/MPC5554, but only channels 32-63 function for the MPC5554.
Table 9-22. DMA Request Summary for eDMA
DMA Request
Channel
Source
Description
eQADC_FISR0_CFFF0
0
EQADC.FISR0[CFFF0]
eQADC Command FIFO 0 Fill Flag
eQADC_FISR0_RFDF0
1
EQADC.FISR0[RFDF0]
eQADC Receive FIFO 0 Drain Flag
eQADC_FISR1_CFFF1
2
EQADC.FISR1[CFFF1]
eQADC Command FIFO 1 Fill Flag
eQADC_FISR1_RFDF1
3
EQADC.FISR1[RFDF1]
eQADC Receive FIFO 1 Drain Flag
eQADC_FISR2_CFFF2
4
EQADC.FISR2[CFFF2]
eQADC Command FIFO 2 Fill Flag
eQADC_FISR2_RFDF2
5
EQADC.FISR2[RFDF2]
eQADC Receive FIFO 2 Drain Flag
eQADC_FISR3_CFFF3
6
EQADC.FISR3[CFFF3]
eQADC Command FIFO 3 Fill Flag
eQADC_FISR3_RFDF3
7
EQADC.FISR3[RFDF3]
eQADC Receive FIFO 3 Drain Flag
eQADC_FISR4_CFFF4
8
EQADC.FISR4[CFFF4]
eQADC Command FIFO 4 Fill Flag
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 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
Summary of Contents for MPC5553
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