Cambridge Audio Azur 840C Supplementary Manual
Serial control protocol v1.1
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Also See for Azur 840C:
- Service manual (62 pages) ,
- User manual (23 pages) ,
- Quick start (2 pages)
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Azur 840C Serial Control Protocol V1.1
1.1
RS232 Protocol
The protocol is accessed via COM1 i.e. the rear panel RS232C port.
1.2
Command Format
Command
Header
Group
#
1 to 5
byte num:
1
1
Notes:
All data consists of ASCII bytes.
Settings for RS232 comm port are 9600,N,8,1 with no handshaking.
CR is carriage return, ASCII value 13 decimal.
Command Data consists of 10 characters maximum.
1.3
Command Groups
Commands are split into the following groups:
Group
Group Name
Number
1
Control Commands
2
Setup Commands
3
Replies from Control Commands and Updates
4
Replies from Setup Commands
5
Error Messages
Gallery Court, Hankey Place, London SE1 4BB England Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Web: www.cambridge-audio.com
Command
Command
Number
Data
,
01 to 34
,
XXXX
1
2
1
XX
Footer
CR
1
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Summary of Contents for Cambridge Audio Azur 840C
- Page 1 Azur 840C Serial Control Protocol V1.1 RS232 Protocol The protocol is accessed via COM1 i.e. the rear panel RS232C port. Command Format Command Command Command Header Footer Group Number Data 1 to 5 01 to 34 XXXX byte num: Notes: All data consists of ASCII bytes.
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Page 2: Commands And Messages
Commands and Messages 1.4.1 Group 1 - Control Commands Command Command Description Command Data Example Number Source Select 1 – CD playback, 2 - SPDIF1, 3 - SPDIF2 #1,01,2\r - Select SPDIF 2 Input Select Up No Data #1,02,\r - Next input up Input Select Down No Data #1,03,\r -Next input down... - Page 3 1.4.1 Group 1 - Control Commands continued Command Command Description Command Data Example Number Random Toggle No Data #1,26,\r - Random Remain Toggle No Data #1,27,\r - Remain Repeat Toggle No Data #1,28,\r - Repeat Program Toggle No Data #1,29,\r - Program Intro Toggle No Data #1,30,\r - Intro...
- Page 4 1.4.3 Group 3 - Replies from Control Commands and Updates Command Command Description Command Data Example Number Source Changed 1 - CD, 2 - SPDIF1, 3 - SPDIF2 #3,01,2\r - SPDIF 2 selected Input Word Width 16 to 24 bits, <=20 bits, <=24 bits #3,04,20\r - Word width is 20 bits 32, 44.1, 48, 88.2, 96, 176.4, 192 or Input Sampling Frequency...
- Page 5 #5,03,\r - Command data error Information in this document has been carefully checked for accuracy; however, Cambridge Audio's policy is one of continuous improvement, therefore design and specifications are subject to change without prior notice. If you notice any errors please feel free to email us at: support@cambridgeaudio.com...
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