Dma Request Sources - Motorola DSP56367 User Manual

6.5

DMA REQUEST SOURCES

The DMA Request Source bits (DRS0-DRS4 bits in the DMA Control/Status registers)
encode the source of DMA requests used to trigger the DMA transfers. The DMA request
sources may be the internal peripherals or external devices requesting service through the
IRQA, IRQB, IRQC and IRQD pins. The DMA Request Sources are shown in Table 6-7.
DMA Request Source Bits
DRS4...DRS0
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111-11111
MOTOROLA
Table 6-7 DMA Request Sources
External (IRQA pin)
External (IRQB pin)
External (IRQC pin)
External (IRQD pin)
Transfer Done from DMA channel 0
Transfer Done from DMA channel 1
Transfer Done from DMA channel 2
Transfer Done from DMA channel 3
Transfer Done from DMA channel 4
Transfer Done from DMA channel 5
DAX Transmit Data
ESAI Receive Data (RDF=1)
ESAI Transmit Data (TDE=1)
SHI HTX Empty
SHI FIFO Not Empty
SHI FIFO Full
HDI08 Receive Data
HDI08 Transmit Data
TIMER0 (TCF=1)
TIMER1 (TCF=1)
TIMER2 (TCF=1)
ESAI_1 Receive Data (RDF=1)
ESAI_1 Transmit Data (TDE=1)
RESERVED
DSP56367
Core Configuration
DMA Request Sources
Requesting Device
6-13