![background image](http://html.mh-extra.com/html/motorola/dsp56012/dsp56012_user-manual_246562132.webp)
4-52
DSP56012 User’s Manual
MOTOROLA
Parallel Host Interface
Host Interface (HI)
Figure 4-27
Host Command
$17—DEFAULT
VIEW FROM HOST
VIEW FROM DSP56012
1.
WRITE CVR WITH DESIRED HV.
HC
HOST COMMAND
2.
SET HC = 1.
3.
HCP IS SET UNTIL INTERRUPT IS ACKNOWLEDGED.
4.
HOST COMMAND IS MASKED UNTIL HCIE = 1.
5.
WHEN THE HOST COMMAND interrupt IS ACKNOWLEDGED, THE HC
BIT IS CLEARED BY THE HOST COMMAND LOGIC. HC CAN BE READ AS
A STATUS BIT.
HCP
HOST COMMAND PENDING
interrupt VECTOR TABLE
HCIE
HOST COMMAND INTERRUPT ENABLE
P:$007E
AVAILABLE FOR HOST COMMAND
FAST INTERRUPT
OR
LONG INTERRUPT
$1
COMMAND VECTOR
REGISTER (CVR)
HC—HOST COMMAND (STATUS)
P:$0000
HOST COMMAND DEFAULT VECTOR
P:$0034
AVAILABLE FOR HOST COMMAND
AVAILABLE FOR HOST COMMAND
interrupt VECTOR
ADDRESS = HV x 2
$1
COMMAND
VECTOR
REGISTER (CVR)
1
HOST VECTOR (HV)
70
0
5
X:$FFE8
HOST CONTROL
REGISTER (HCR)
0
HF3
HF2
HTIE
HRIE
70
0
0
6
5
432
1
1
X:$FFE9
HOST STATUS
REGISTER (HSR)
DMA
HF1
HF0
HTDE
HRDF
70
0
0
6
5
432
1
1
AA0336
0
HOST VECTOR (HV)
70
0
5
Note: When using the SAI and DAX
peripherals, do not use interrupt vector
addresses P:$0040–$004A, $0050,
$0052, and $0056.
Summary of Contents for DSP56012
Page 12: ...xii Motorola ...
Page 20: ...xx Motorola ...
Page 21: ...MOTOROLA DSP56012 User s Manual 1 1 SECTION 1 OVERVIEW ...
Page 40: ...1 20 DSP56012 User s Manual MOTOROLA Overview DSP56012 Architectural Overview ...
Page 41: ...MOTOROLA DSP56012 User s Manual 2 1 SECTION 2 SIGNAL DESCRIPTIONS ...
Page 61: ...SECTION 3 MEMORY OPERATING MODES AND INTERRUPTS ...
Page 81: ...MOTOROLA DSP56012 User s Manual 4 1 SECTION 4 PARALLEL HOST INTERFACE ...
Page 148: ...4 68 DSP56012 User s Manual MOTOROLA Parallel Host Interface Host Interface HI ...
Page 149: ...MOTOROLA DSP56012 User s Manual 5 1 SECTION 5 SERIAL HOST INTERFACE ...
Page 179: ...MOTOROLA DSP56012 User s Manual 6 1 SECTION 6 SERIAL AUDIO INTERFACE ...
Page 205: ...MOTOROLA DSP56012 User s Manual 7 1 SECTION 7 GPIO ...
Page 210: ...7 6 DSP56012 User s Manual MOTOROLA GPIO GPIO Register GPIOR ...
Page 211: ...MOTOROLA DSP56012 User s Manual 8 1 SECTION 8 DIGITAL AUDIO TRANSMITTER ...
Page 226: ...8 16 DSP56012 User s Manual MOTOROLA Digital Audio Transmitter DAX Programming Considerations ...
Page 233: ...MOTOROLA DSP56012 User s Manual B 1 APPENDIX B PROGRAMMING REFERENCE ...