8-18
DSP56367
MOTOROLA
Host Interface (HDI08)
HDI08 – DSP-Side Programmer’s Model
is caused by clearing the HEN bit (HPCR bit 6). The stop reset (ST) is caused by executing the
STOP instruction.
8.5.10
HOST INTERFACE DSP CORE INTERRUPTS
The HDI08 may request interrupt service from either the DSP core or the host processor. The
DSP core interrupts are internal and do not require the use of an external interrupt pin. When
the appropriate interrupt enable bit in the HCR is set, an interrupt condition caused by the host
processor sets the appropriate bit in the HSR, generating an interrupt request to the DSP core.
The DSP core acknowledges interrupts caused by the host processor by jumping to the
appropriate interrupt service routine. The three possible interrupts are as follows:
•
Host command
•
Transmit data register empty
•
Receive data register full
Although there is a set of vectors reserved for host command use, the host command can
access any interrupt vector in the interrupt vector table. The DSP interrupt service routine
Table 8-7 DSP-Side Registers after Reset
Register
Name
Register
Data
Reset Type
HW
Reset
SW
Reset
IR
Reset
ST
Reset
HCR
All bits
0
0
—
—
HPCR
All bits
0
0
—
—
HSR
HF[1:0]
0
0
—
—
HCP
0
0
0
0
HTDE
1
1
1
1
HRDF
0
0
0
0
DMA
0
0
—
—
HBAR
BA[10:3]
$80
$80
—
—
HDDR
DR[15:0]
0
0
—
—
HDR
D[15:0]
—
—
—
—
HORX
HORX[23:0]
empty
empty
empty
empty
HOTX
HOTX[23:0]
empty
empty
empty
empty
Note: A long dash (—) denotes that the register value is not affected by the specified reset.
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: ......