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N

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512 CD/SACD Player Serial Communications Protocol 

Mark Levinson

 

1 Documents 

The following documents should also be used with this document to understand how this protocol can be 
used with the N

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512 CD/SACD Player. 

070-19027 N

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512 CD/SACD Player Owner’s Manual 

 

 

1.1 Change List 

No changes have been made. 
 

2  Definitions, Acronyms, and Abbreviations 

\r 

represents the ASCII new line control character (0x0D) 

:  

External Protocol String Field Separator 

External Protocol String Field Parameter Separator for multiple parameters 

ACK Acknowledge 

AV 

Audio Video System generated response 

CMD Command 

CS Control 

Source 

EOP 

End of Packet 

HOST 

The device initiating or receiving the serial communication packets to/from the  
player. 

ML Mark 

Levinson 

N

o

512 

The Mark Levinson product receiving or transmitting the serial communication 
packets to/from the HOST.  

NAK/NACK No 

Acknowledge 

NTF Notification 

PARAM Parameter 

RQST Request 

RSP Response 

SOP 

Start of Packet 

SPG 

Serial Protocol Guidelines 

UI User 

Interaction 

User Parameter 

A user changeable variable that stores a specific value that describes an 
operating condition for the amplifier. 

 
 
 
 
 
 

 

4

 

Summary of Contents for Mark Levinson Protocol Series

Page 1: ...No 512 CD SACD Player Serial Protocol...

Page 2: ...r or an experienced radio TV technician for help Caution Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipmen...

Page 3: ...at of the Message Fields 7 5 2 Incoming Messages 8 5 3 Outgoing Messages 8 5 3 1 RSP Response to Command Request 8 5 3 2 NTF Notification of System Action 8 5 4 Example Request RQST 8 5 5 Example Resp...

Page 4: ...tring Field Parameter Separator for multiple parameters ACK Acknowledge AV Audio Video System generated response CMD Command CS Control Source EOP End of Packet HOST The device initiating or receiving...

Page 5: ...ystem ground The No 512 player receives control messages on pin 2 Data Receive and transmit status responses notifications and query data on pin 3 Data Transmit The connection cable between the No 512...

Page 6: ...hernet Control is defaulted to Auto Negotiate and recommends the end point to also be configured for Auto Negotiation However the No 512 is capable of 10 100 BaseT Half Full duplex flow control Pause...

Page 7: ...selected from the External Protocol Commands table to invoke the desired functionality PARAM The Parameter field specifies the selected parameter from the External Protocol Commands table to achieve...

Page 8: ...utgoing RSP will be generated as the result of an incoming RQST In most cases the response is an acknowledgement ACK unless the request is a query In the case of a query the RSP contains the requested...

Page 9: ...a system parameter using the External Protocol 6 RQST Error Responses and Examples The External Protocol responds with the following message parameters when an unexpected Incoming Request string is d...

Page 10: ...d during an AREA query Request Current AREA State AREA r AREA CD r See note below AREA r AREA SACD_2CHAN r AREA r AREA SACD_MULTI r AREA r AREA NODISC r AREA NACK r The player is in Standby mode so co...

Page 11: ...Brightness DSPLY SETFB r DSPLY ACK r Display set to Full brightness SET2 Sets Display Brightness to Setting 2 DSPLY SET2 r DSPLY ACK r Display set to Medium brightness SET1 Sets Display Brightness to...

Page 12: ...PDWNUP ACK r Also removes the player from Standby mode STANDBY FPDWNUP STANDBY r FPDWNUP ACK r Also removes the player from Standby mode FPDWNUP NACK r The player is in Standby Mode so commands except...

Page 13: ...K r TIME IRDWNUP TIME r IRDWNUP ACK r CD_SACD IRDWNUP CD_SACD r IRDWNUP ACK r MUTE IRDWNUP MUTE r IRDWNUP ACK r CLEAR IRDWNUP CLEAR r IRDWNUP ACK r PROGRAM IRDWNUP PROGRAM r IRDWNUP ACK r 0 IRDWNUP 0...

Page 14: ...DIS r MSG ACK r NTF Query Notification State MSG NTF r MSG EN r Notification is Enabled MSG NTF r MSG DIS r Notification is Disabled MSG NACK r The player is in Standby Mode so commands are ignored 7...

Page 15: ...ate PWR r PWR STANDBY r System in Standby EN Enables Notification PWR EN r PWR ACK r DIS Disables Notification PWR DIS r PWR ACK r NTF Query Notification State PWR NTF r PWR EN r Notification is Enabl...

Page 16: ...OFF r SHUFFLE r SHUFFLE ON r SHUFFLE NACK r The player is in Standby Mode so commands are ignored 7 14 TIME Command Parameter Function Incoming Request Outgoing Response Comment TIME TOT Time on Trac...

Page 17: ...6 VOL Command Parameter Function Incoming Request Outgoing Response Comment VOL 00 0 to 73 2 Sets Volume level between 00 0 and 73 2 VOL 71 1 r VOL ACK r Sets the Volume level to a selected value The...

Page 18: ...n not available for this command CONTROL N A Notification not available for this command DRAWER N A Notification not available for this command DSPLY NO FPDWNUP N A Notification not available for this...

Page 19: ......

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