Manuals / Motorola / Home Audio / Stereo System

Motorola DSP56301 user manual LOOP11

Models: DSP56301

1 372
Download 372 pages 304 b
Page 308
Image 308

do #6,_LOOP9

; read number of words and starting address

movem p:(r2)+,a2

; Get the 8 LSB from ext. P mem.

asr #8,a,a

; Shift 8 bit data into A1

_LOOP9

;

move a1,r0

; starting address for load

move a1,r1

; save it in r1

 

; a0 holds the number of words

do a0,_LOOP10

; read program words

do #3,_LOOP11

; Each instruction has 3 bytes

movem p:(r2)+,a2

; Get the 8 LSB from ext. P mem.

asr #8,a,a

; Shift 8 bit data into A1

_LOOP11

; Go get another byte.

movem a1,p:(r0)+

; Store 24-bit result in P mem.

nop

; movem cannot be at LA.

_LOOP10

; and go get another 24-bit word.

bra <FINISH

; Boot from EPROM done

;========================================================================

TERMINATE

enddo

; End the loop before exit.

FINISH

 

;This is the exit handler that returns execution to normal

;expanded mode and jumps to the RESET vector.

andi #$0,ccr

;

Clear CCR as if RESET to

0.

jmp (r1)

;

Then go to starting Prog

addr.

; End of bootstrap code. Number of program words: 191.

BURN

 

 

 

 

;; get PATTERN pointer

 

 

clr b

#PATTERNS,r6

;; b is the error accumulator

 

move

#<(NUM_PATTERNS-1),m6

;; program runs forever in

 

 

 

;; cyclic form

 

;; configure SCK0 as gpio output. PRRC register is cleared at reset.

 

movep

b,x:M_PDRC

;; clear GPIO data register

 

bset

#SCK0,x:M_PRRC

;; Define SCK0 as output GPIO pin

 

 

 

;; SCK0 toggles means test pass

 

do #9,burn1

 

 

;;----------------------------

 

 

;; test RAM

 

 

;; each pass checks 1 pattern

 

 

;;----------------------------

 

 

move

p:(r6)+,x1

;; pattern for x memory

 

move

p:(r6)+,x0

;; pattern for y memory

 

move

p:(r6)+,y0

;; pattern for p memory

 

;; write pattern to all memory locations

if

(EQUALDATA)

;; x/y ram symmetrical

 

;; write x and y memory

 

 

clr a

#start_dram,r0

;; start of x/y ram

 

move

#>length_dram,n0

;; length of x/y ram

 

 

 

 

A-12

DSP56301 User’s Manual

Page 307 Page 309
Page 308
Image 308
Motorola DSP56301 user manual LOOP11
Page 307 Page 309

DSP56301 specifications

The Motorola DSP56301 is a highly efficient digital signal processor, specifically engineered for real-time audio and speech processing applications. This DSP is part of Motorola's renowned DSP56300 family, which is recognized for its innovative features and outstanding performance in the realm of digital signal processing.

One of the main features of the DSP56301 is its ability to handle complex computations at high speeds. With a maximum clock frequency of 66 MHz, it delivers fast performance, enabling it to process audio signals in real time. The chip is built on a 24-bit architecture, which allows for high-resolution audio processing. This is particularly beneficial in applications such as telecommunications, consumer audio devices, and professional audio equipment, where precision is paramount.

The DSP56301 boasts a comprehensive instruction set that includes efficient mathematical operations, which are essential for digital filters and audio effects processing. One of the key innovations of this device is its dual data path architecture, which permits simultaneous processing of multiple data streams. This feature significantly enhances the device's throughput and responsiveness, making it suitable for demanding applications such as voice recognition and synthesis.

In terms of memory regions, the DSP56301 includes several on-chip memory categories, such as program memory, data memory, and a specialized memory for coefficients. The architecture's support for external memory expansion further increases its versatility, allowing designers to tailor systems to their specific requirements.

The DSP56301 implements advanced features such as a powerful on-chip hardware multiplier and accumulator, simplifying complex mathematical tasks and accelerating the execution of algorithms. Its flexible interrupt system enhances its capability to respond to time-sensitive operations, while the integrated serial ports facilitate efficient data communication with external devices.

Power consumption is also a vital characteristic of the DSP56301. It is designed with energy efficiency in mind, allowing for extended operation in battery-powered devices. The chip’s low power requirements are particularly advantageous in portable audio devices and other applications where energy conservation is crucial.

In conclusion, the Motorola DSP56301 is an exceptional digital signal processor that combines high processing power, flexibility, and efficiency. Its main features, advanced technologies, and robust architecture make it a top choice for developers seeking to create sophisticated audio and signal processing systems. With its enduring legacy in the industry, the DSP56301 continues to be relevant in a variety of modern applications, ensuring it remains a valuable tool for engineers and designers.