Freescale Semiconductor DSPD56362EVM Upgrade Manual

DSPD56362EVM

Upgrade Manual

Revision 3.1

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Semiconductor Products Sector
Digital Audio Operations
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OnCE is a trademark of Motorola, Inc.

Introduction

This document provides a description of how to upgrade the standard DSP56362EVM
Evaluation Module to the DSPD56362 and related components. After the upgrade is complete
the EVM system will be capable of autodectect/autoswitching of PCM, Dolby DigitalTM,
DTSTM and MPEG bitstreams in addition to various post decoder functions. The user interface
of the upgraded EVM is also described.

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MOTOROLA DSPD56362EVM Upgrade Manual iii

TABLE OF CONTENTS

Paragraph Page
Number Title Number

1.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 UPGRADE KIT CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.3 UPGRADE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.3.1 DSP Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.3.2 68HC11 Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.3.3 EPROM Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.3.4 Jumper Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 REQUIRED EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.3 DEMONSTRATION SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.4 USER INTERFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.4.1 LCD Screen Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.4.2 Decoder Activation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.4.3 Decoder Source Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.4.4 Speaker Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.4.5 Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.4.5.1 Master Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.4.5.2 Individual Volume Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 MAIN FUNCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.3 SYSTEM-SPECIFIC CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.4 MODE SCREENS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.5 EVENT-HANDLER FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.6 SPI COMMUNICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.6.1 Receiving Data from the DSP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.6.2 Transmitting Data to the DSP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

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-iv DSPD56362EVM Upgrade Manual MOTOROLA

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MOTOROLA DSPD56362EVM Upgrade Manual iii

LIST OF FIGURES

Figure Page
Number Title Number

Figure 1-1 Upgradeable Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Figure 1-2 Jumper Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Figure 2-1 Home Theater Demonstration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-2 Jumper Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-3 LCD Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-4 LCD Screens (cont.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

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-vi DSPD56362EVM Upgrade Manual MOTOROLA

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MOTOROLA DSPD56362EVM Upgrade Manual 1-1

SECTION 1

UPGRADE INSTRUCTIONS

1.1 INTRODUCTION

This section describes the instructions on how to upgrade the DSP56362EVM to have DSPD56362
decoder functionality. The DSP56362EVM upgrade kit allows user to replace the DSP, 68HC11, and
EPROM to add the following functionalities to the EVM:

• Auto-detection of Dolby DigitalTM, DTSTM, MPEG and PCM source.

• Standalone operation of EVM.

• LCD user interface for control and status operations.

1.2 UPGRADE KIT CONTENTS

The DSP56362EVM upgrade kit contains the following items:

• DSPD56362 Rev. D digital signal processor

• MC68HC711E9 Rev 3.0 microcontroller

• AT27LV010A Rev 1.0 EPROM

• Jumpers

• EVM Supplement Manual (this document)

The DSPD56362 Applications User Manual can be downloaded from Motorola’s website:

http://mot-sps.com/ADC/markets/dspaudio/DSP56362.html

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1-2 DSPD56362EVM Upgrade Manual MOTOROLA

UPGRADE INSTRUCTIONS
UPGRADE INSTRUCTIONS

1.3 UPGRADE INSTRUCTIONS

Figure 1-1 shows the location of the DSP, 68HC11, and EPROM. These components need to be

replaced with the components included in the upgrade kit. Pin 1 is indicated by the black dot.

Figure 1-1 Upgradeable Devices

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UPGRADE INSTRUCTIONS
UPGRADE INSTRUCTIONS

MOTOROLA DSPD56362EVM Upgrade Manual 1-3

1.3.1 DSP Replacement

To upgrade the DSP:

1. Use a Philips-head screwdriver to remove the 4 screws on the DSP socket U1.

2. Remove the socket top.

3. Remove the generic DSP using a chip suction device and replace it with the DSP included in
the upgrade kit. Verify that the DSP is placed in the socket securely and that the pins make
contact with the socket. Refer to Figure 1-1 for the correct orientation of the DSP.

Caution: To avoid damaging the DSP, use an anti-static wrist band when handling this
device. Using a device other than a chip suction device to lift the DSP may damage the
fine-pitched pins.

4. Replace the socket top and screw the top down.

1.3.2 68HC11 Replacement

To upgrade the 68HC11:

1. Remove the 68HC11 microcontroller from the socket U7 using a PLCC chip extractor device.

2. Replace the component with the 68HC11 included in the upgrade kit. Refer to Figure 1-1 for
the correct orientation of the 68HC11.

1.3.3 EPROM Replacement

To upgrade the EPROM:

1. Remove the EPROM from the socket U6 using a PLCC chip extractor device.

2. Replace the component with the EPROM included in the upgrade kit. Refer to Figure 1-1 for
the correct orientation of the EPROM.

1.3.4 Jumper Settings

Figure 1-2 shows how to modify the jumper settings:

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1-4 DSPD56362EVM Upgrade Manual MOTOROLA

UPGRADE INSTRUCTIONS
UPGRADE INSTRUCTIONS

1. Place a jumper from JP11 pin 14 to JP11 pin 17. (PB13 to +3.3V)

2. Place a jumper from JP11 pin 15 to JP11 pin 6. (PB14 to GND)

3. Place jumpers on JP8 pins 1-2, 5-6, and 7-8. (MODE 2)

Figure 1-2 Jumper Settings

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MOTOROLA DSPD56362EVM Upgrade Manual 2-1

SECTION 2

DEMONSTRATION INSTRUCTIONS

2.1 INTRODUCTION

This section describes the instructions on how to setup the EVM to demonstrate Dolby
DigitalTM, Dolby Pro LogicTM, DTSTM and MPEG decoding.

2.2 REQUIRED EQUIPMENT

• Dolby DigitalTM, DTSTM, or PCM source, i.e. DVD, Laserdisc, DAT, CD, VHS, etc.

• An audio amplifier driving headphones or speakers as shown on the following page in

Figure 2-1

• 7-9V AC/DC power supply

2.3 DEMONSTRATION SETUP

1. Verify that the DSP, 68HC11, and EPROM have been upgraded as described in

Section 2.3.

2. Verify that the jumper modifications have been made as described in Section 1.3.4.

3. Verify that the jumper settings are correct as shown in Figure 2-2. The default jumper

setting assumes that an optical cable is used to connect the input to the EVM.
However, if using a coaxial cable, move the jumper on JP18 to pins 1-2.

4. Connect the input and output cables to the EVM as shown in Figure 2-1.

5. Apply 7-9V AC/DC to the power connector P2.

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2-2 DSPD56362EVM Upgrade Manual MOTOROLA

DEMONSTRATION INSTRUCTIONS
Demonstration Setup

Figure 2-1 Home Theater Demonstration

Power Amp

Laserdisc/DVD Player

Listener

DSP56362EVM

Subwoofer
(unpowered)

Subwoofer
(powered)

DSP56362

68HC11E9

BB1716

BB1716

BB1716

BB1716

ISPLS

12032

DIR1700

CS8414

CS8404

BB1800

P2

P3

P1

JP12

JP16

JP13

JP14

JP8

JP31

JP11

JP15

JP7 JP5

JP4

JP20

JP24

JP19

JP2

JP25JP23JP21

JP22

JP10

JP20

IR Rx

JP18

GS71108J-10

GS71108J-10

GS71108J-10

LR

Rs

Ls

C

Sub

Ra

La

Lin Rin

Elec.
out

Elec.
out

Opt.

in

Elec.
in

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DEMONSTRATION INSTRUCTIONS

Demonstration Setup

MOTOROLA DSPD56362EVM Upgrade Manual 2-3

Figure 2-2 Jumper Settings

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2-4 DSPD56362EVM Upgrade Manual MOTOROLA

DEMONSTRATION INSTRUCTIONS
User Interface

2.4 USER INTERFACE

Figure 2-3 illustrates the different screens of the LCD panels and the corresponding actions of the

pushbutton switches.

Figure 2-3 LCD Screens

S2 S3 S4 S5

EVM56362 vx.x
Go

S2 S3 S4 S5

Dolby Digital
Spkr Vol

TO VOLUME CONFIGURATION SCREEN

START SCREEN

DECODER STATUS SCREEN

TO SPEAKER CONFIGURATION SCREEN

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DEMONSTRATION INSTRUCTIONS

User Interface

MOTOROLA DSPD56362EVM Upgrade Manual 2-5

S2 S3 S4 S5

Left/Right: WIDE
Wide Nrrw Next

S2 S3 S4 S5

Center: WIDE
Wide Nrrw None Next

S2 S3 S4 S5

Surround: WIDE
Wide Nrrw None Next

S2 S3 S4 S5

Subwoofer: WIDE
Wide None Next Home

SPEAKER CONFIGURATION SCREEN

TO DECODER STATUS SCREEN

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2-6 DSPD56362EVM Upgrade Manual MOTOROLA

DEMONSTRATION INSTRUCTIONS
User Interface

S2 S3 S4 S5

Volume Setting
Mstr Indv Home

S2 S3 S4 S5

RightSurr + 0 dB
V+ V- Next Home

S2 S3 S4 S5

Left + 0 dB
V+ V- Next Home

VOLUME CONFIGURATION SCREEN

S2 S3 S4 S5

Center + 0 dB
V+ V- Next Home

S2 S3 S4 S5

Right + 0 dB
V+ V- Next Home

S2 S3 S4 S5

LeftSurr + 0 dB
V+ V- Next Home

S2 S3 S4 S5

Subwoofer + 0 dB
V+ V- Next Home

S2 S3 S4 S5

Master + 0 dB
V+ V- Un/Mute Home

S2 S3 S4 S5

Mute: OFF
On Off Home

TO DECODER STATUS SCREEN

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DEMONSTRATION INSTRUCTIONS

User Interface

MOTOROLA DSPD56362EVM Upgrade Manual 2-7

Figure 2-4 LCD Screens (cont.)

2.4.1 LCD Screen Description

The EVM’s user interface allows the user to perform the following functions:

• Activate the DSP decoder functionality

• Obtain decoder source type status information

• Select speaker configuration

• Control the master volume

• Control the individual channels volume

• Control mute and unmute

2.4.2 Decoder Activation

Once power is applied to the EVM, the Start Screen will be displayed on the LCD panel. Pre ssing the
S2 button (‘Go’) will activate the decoder and the LCD will display the message ‘Wait...’ until a
software patch is downloaded to the DSP. After several seconds, auto-detection is activated and the
decoder type is shown on the screen.

2.4.3 Decoder Source Type

It is not necessary to reset the EVM when changing the source (AC-3, DTS, MPEG or PCM). Once
the change is made the LCD panel will automatically display the current decoder source type on the
Decoder Status Screen.

2.4.4 Speaker Configuration

Pressing the S2 button (‘Spkr’) while in the Decoder Screen gives the user control of the speaker
configuration. The default configuration for the left, right, center, surround, and subwoofer speakers
are initially set to ‘Wide’ mode. However, the user has the option of changing the left, right, center,
and surround speaker configuration to ‘Narrow’ mode or turning off the center, surround and
subwoofer speakers for a two-speaker configuration. Pressing the ‘Next’ button allows the user to

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2-8 DSPD56362EVM Upgrade Manual MOTOROLA

DEMONSTRATION INSTRUCTIONS
User Interface

configure the next speaker. Table 2-1 summarizes the available speaker settings. If the source is
PCM, the DSP assumes the source is surround encoded and decodes the bitstream as Dolby Pro
Logic.

2.4.5 Volume Control

Pressing the S4 button (‘Vol’) while in the Decoder Screen gives the user control of the master and
individual channel volume. The default master and individual channel volume setting is 0 dB.

2.4.5.1 Master Volume Control

Pressing the S2 button (‘Mstr’) while in the Volume Screen gives the user control of the master
volume. In the Master Volume Screen, the master volume may be changed by pressing the S2 button
(‘V+’) to increase the volume or the S3 button (‘V-) to decrease the volume in increments of 1 dB.
The volume range is from -64 dB to +64 dB.

The master volume may be muted and unmuted by pressing the S4 button (‘Un/Mute’) and selecting
‘On’ or ‘Off’.

Pressing the S5 button (‘Home’) changes the display back to the Decoder Screen.

2.4.5.2 Individual Volume Control

Pressing the S3 button (‘Indiv’) while in the Volume Screen gives the user control of the individual
channel volume. In the Individual Channel Volume Screen, the individual channel volume may be
changed by pressing the S2 button (‘V+’) to increase the volume or the S3 button (‘V-) to decrease

Table 2-1 Speaker Configuration

SPEAKER SETTINGS

Left/Right Wide - default

Narrow

Center Wide - default

Narrow
None

Surround Wide - default

Narrow
None

Subwoofer Wide - default

None

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DEMONSTRATION INSTRUCTIONS

User Interface

MOTOROLA DSPD56362EVM Upgrade Manual 2-9

the volume in increments of 1 dB. The volume range is from -64 dB to +64 dB. The S4 button
(‘Next’) allows the user to cycle through the different channels.

Pressing the S5 button (‘Home’) changes the display back to the Decoder Screen.

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2-10 DSPD56362EVM Upgrade Manual MOTOROLA

DEMONSTRATION INSTRUCTIONS
User Interface

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MOTOROLA DSPD56362EVM Upgrade Manual 3-1

SECTION 3

68HC11 SOURCE CODE DESCIPTION

3.1 INTRODUCTION

This section gives a brief description of how the 68HC11 microcontroller code works in case
the user needs to make modifications or additions to the user interface.

3.2 MAIN FUNCTION

The following steps are taken in the main function of the code:

1. InitRegs( )- Initialize 68HC11 control registers:

• Configure Port A pins to be inputs from switches S2, S3, S4, and S5.

• Configure Port B pins to be outputs to LCD and D/A converters control signals.

• Configure Port C pins to be outputs to LCD data lines.

• Configure Port D pins to be input from and outputs to DSP’s SHI port.

2. InitVol( )- Initialize D/A converters:

• Configure D/A converters to operate in software mode.

• Initialize attenuation and input data format for all four D/A converters.

3. InitKey( )- Initialize key input manager:

• Configure keypad action on the EVM.

4. InitLCD( )- Initialize LCD manager:

• Configure to display messages on the LCD.

5. InitParams( )- Initialize parameters:

• Initialize left, right, center, surround, and subwoofer volume at 0 dB.

6. SetMode(BOOT_MODE) - Display initial screen on LCD.

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3-2 DSPD56362EVM Upgrade Manual MOTOROLA

68HC11 SOURCE CODE DESCIPTION
SYSTEM-SPECIFIC CONFIGURATION

• Run InitAV2( ) function

• Run RunPatch( ) function.

7. Enable interrupts and wait for keypad inputs.

3.3 SYSTEM-SPECIFIC CONFIGURATION

The InitAV3( ) function configures specific DSP registers for the EVM56362. However, other
systems may require different settings and this function may need to be modified. These system
differences may affect the following:

• Multiplication factor in the PCTL.

• Address attribute AAx signals for selecting external memory devices.

• Number of wait states for each AAx signal in the BCR.

• ESAI receive and transmit configuration.

Table 3-1 shows the default DSP register settings for the EVM56362.

Table 3-1 InitAV2 Default Settings

REGISTER ADDRESS VALUE DESCRIPTION

PLL PCTL 0xFFFFFD 0x0F000B DSP operating frequency of 96Mhz
BUS

INTERFACE

AAR0 0xFFFFF9 0x0C063D Additional address line A18
AAR1 0xFFFFF8 0x080539 Map external EPROM access X/Y/P:$080000

to $0FFFFF

AAR2 0xFFFFF7 0x040639 Map external SRAM access X/Y/P:$040000

to $07FFFF

BCR 0xFFFFFB 0x0005E1 AAR0 1 wait state

AAR1 15 wait staes
AAR2 1 wait state

INTERRUPT
PRIORITY

IPRP 0xFFFFFE 0x000187 ESAI interrupt priority level 2

DAX interrupt priority level 1
Timer, SHI interrupt level 0

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68HC11 SOURCE CODE DESCIPTION

SYSTEM-SPECIFIC CONFIGURATION

MOTOROLA DSPD56362EVM Upgrade Manual 3-3

ENHANCED
SERIAL
AUDIO
INTERFACE

SAICR 0xFFFFB4 0x000000 Independent clock and frame sync signals for

Rx and Tx (asynchronous)

RCR 0xFFFFB7 0x714902 RX1 is enabled, shift data in MSB first,

left-aligned data word, network mode, 32-bit
slot length, 16-bit word length, word-lenght
frame sync, frame sync occurs 1 seri al clock
cycle earlier, Rx, Rx exception, and Rx even
data slot interrupts are enabled

RCCR 0xFFFFB8 0x0C0200 Fixed divide by 8 prescaler is operational, 2

words per frame, falling edge of Rx clock is
used to clock data in and frame sync, rising
edge of Rx clock is used to latch data in and
frame sync, frame start indicated by low level
on frame sync pin

TCR 0xFFFFB5 0x717D0F TX0, TX1, TX2 and TX3 are enabled, shift

data out in MSB first, left-a ligned data word,
network mode, 32-bit slot length, 24-bit word
length, word-length frame sync, Tx, Tx
exception, and Tx eve n data slot inter rupts ar e
enabled

TCCR 0xFFFFB6 0x0C0200 Fixed divide by 8 prescaler is operational, 2

words per frame, falling edge of Tx clock is
used to clock data out and frame sync, rising
edge of Rx clock is used to latch the data and
frame sync in, frame start is indicate d by low
level on frame sync pin

RSMA 0xFFFFBB 0x000003 Receive a data word and generate a receive

full condition RDF=1 for slots 1 and 2
RSMB 0xFFFFBC 0x000000 Only slots 1 and 2 are used
TSMA 0xFFFFB9 0x000003 Transmit a data word and generate a transmit

empty condition TDE=1 for slots 1 and 2
TSMB 0xFFFFBA 0x000000 Only slots 1 and 2 are used

Table 3-1 InitAV2 Default Settings (Continued)

REGISTER ADDRESS VALUE DESCRIPTION

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3-4 DSPD56362EVM Upgrade Manual MOTOROLA

68HC11 SOURCE CODE DESCIPTION
MODE SCREENS

3.4 MODE SCREENS

Each screen is defined by the current mode as well as the next mode associated with each of the four
switches. These modes are stored in the array tableModes. The example below shows the format
of the mode screen:

tableModes[ ] =
{

{CURRENT_MODE,

{NXT_MODE_S2, NXT_MODE_S3, NXT_MODE_S4, NXT_MODE_S5},
“Text Line” 1,
“Action_S2 Action_S3 Action_S4 Action_S5”},

}

In the example below, BOOT_MODE is the first screen that is displayed when the DSP is reset.
Decoding is started when “Go” is selected by pressing switch S2. When S2 is pressed, the new mode
is DEC_MODE which displays the decoder type. Pressing switch S3, S4, or S5 does not initiate any
action, thus NO_MODE is the next mode.

tableModes[ ] =
{

{BOOT_MODE,

{DEC_MODE, NO_MODE, NO_MODE, NO_MODE},
“EVM56362”,
“Go”},

}

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68HC11 SOURCE CODE DESCIPTION

EVENT-HANDLER FUNCTION

MOTOROLA DSPD56362EVM Upgrade Manual 3-5

3.5 EVENT-HANDLER FUNCTION

The ProcessEvent( ) function processes the events according to the current display mode and
keypad action. For example, if the current mode is MUTE_MODE, the ProcessEvent function
sends the mute command to the DSP if switch S2 is pressed, or it sends the unmute command to the
DSP if switch S3 is pressed, or sets the mode to the decoder status mode DEC_MODE if S5 pressed.

ProcessEvent ( )
{

case(MUTE_MODE):
{

send MUTE opcode if S2 is pressed
send UNMUTE opcode if S3 is pressed
return to start screen if S5 is pressed

break;

}

}

3.6 SPI COMMUNICATION

Communication between the 68HC11 host microcontroller and the DSP is via SPI. The host is
configured as the master and the DSP is configured as the slave. The ExchangeSPI_DSP
(rx_addr, tx_addr) function performs the SPI communication by exchanging 3 bytes. Data
at address tx_addr is transmitted to the DSP and data received from the DSP is stored at address
rx_addr.

3.6.1 Receiving Data from the DSP

The 68HC11 can receive a data word from the DSP by using the GetDSP (opcode) function.
This function is used for receiving status information from the DSP. The opcode parameter
specifies the status command. For example, the command

DSP_REPLY = GetDSP (MODE_SOURCE)

prompts the DSP to reply with the decoder type. In this case, the parameter MODE_SOURCE is the
command 0x0A02100. The reply may be Dolby Digital, DTS, MPEG, or PCM. The status
opcodes are listed in the DSP56362 Applications User Manual.

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3-6 DSPD56362EVM Upgrade Manual MOTOROLA

68HC11 SOURCE CODE DESCIPTION
SPI COMMUNICATION

3.6.2 Transmitting Data to the DSP

The 68HC11 can transmit a data word to the DSP by using the SendDSP (opcode) function. This
function is used for transmitting control commands to the DSP. The opcode paramet er specifies the
control command. For example, the command

SetDSP (MUTE)

sends the control opcode to mute the outputs of the DSP. In this case the parameter MUTE is the
command 0xE08480. The control opcodes are listed in the DSP56362 Applications User Manual.

The SetDSP function has other variations depending on the number of data words to send. These
variations include:

SetDSP2 (opcode, data)
SetDSP3 (opcode, address, data)
SetDSP4 (opcode, address, data1, data2)
SetDSP5 (opcode, address, data1, data2, data3)

When multiple data words are transmitted, these words are stored in contiguious memory locations.
Forexample, data1 will be stored at address and data2 will be stored at address+1.

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