12-14
DSP56367
MOTOROLA
Digital Audio Transmitter
DAX Programming Considerations
operation. DMA transfers can be performed with or without changing non-audio bits from
frame to frame. Table 12-5 describes two examples of DMA configuration.
The memory organization employed for DMA transfers depends on whether or not non-audio
data changes from frame to frame as shown in Figure 12-6.
Table 12-5 Examples of DMA configuration
Register
Non-audio data bits change
Non-audio data bits do not change
DCR2
DE=1; Enable DMA channel.
DIE=1; Enable DMA interrupt.
DTM[2:0]=010; Line transfer mode.
D3D=0; Not 3D.
DAM[5:3]=000; 2D mode.
DAM[2:0]=101; post increment by 1.
DDS[1:0]=00; X memory space.
DRS[4:0]=01010; DAX is DMA request source.
Other bits are application dependent.
DE=1; Enable DMA channel.
DIE=1; Enable DMA interrupt.
DTM[2:0]=010; Line transfer mode.
D3D=0; Not 3D.
DAM[5:3]=000; 2D mode.
DAM[2:0]=101; post increment by 1.
DDS[1:0]=00; X memory space.
DRS[4:0]=01010; DAX is DMA request source.
Other bits are application dependent.
DCO2
DCOH=number of frames in block - 1
DCOL=$002; 3 destination registers
DCOH=number of frames in block - 1
DCOL=$001; 2 destination registers
DSR2
first memory address of the block
first memory address of the block
DDR2
XNADR address (base a $1)
XADR address (base a $2)
DOR0
$FFFFFE; offset=-2
$FFFFFF; offset=-1
Summary of Contents for DSP56367
Page 16: ...xvi MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Page 22: ...xxii MOTOROLA List of Figures Figure Number Title Page Number ...
Page 26: ...xxvi MOTOROLA List of Tables Table Number Title Page Number ...
Page 148: ...4 6 DSP56367 MOTOROLA Design Considerations PLL Performance Issues ...
Page 248: ...9 30 DSP56367 MOTOROLA Serial Host Interface SHI Programming Considerations ...
Page 306: ...10 58 DSP56367 MOTOROLA Enhanced Serial Audio Interface ESAI ESAI Initialization Examples ...
Page 389: ...Bootstrap ROM Contents MOTOROLA DSP56367 A 15 end ...
Page 390: ...A 16 DSP56367 MOTOROLA Bootstrap ROM Contents ...
Page 432: ...C 8 DSP56367 MOTOROLA JTAG BSDL ...
Page 484: ...D 52 DSP56367 MOTOROLA Programmer s Reference ...
Page 490: ...E 6 DSP56367 MOTOROLA Power Consumption Benchmark ...
Page 516: ...F 26 DSP56367 MOTOROLA IBIS Model ...
Page 522: ...Index 6 MOTOROLA Index ...
Page 523: ......