Cambridge Audio Azur 840A Supplementary Manual
Serial control protocol v1.1
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Also See for Azur 840A:
- Service manual (63 pages) ,
- User manual (26 pages) ,
- White paper (23 pages)
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Azur 840A (V1 & V2) and 840E 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
#
byte num:
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:
Command
Description
Group
1
Control Commands
2
Setup Commands
3
Replies from Setup Commands
4
Replies from Control Commands and Updates
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
Group
Number
1 to 6
,
01 to 18
,
1
1
2
1
Command
Footer
Data
XXXX
CR
XX
1
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Summary of Contents for Cambridge Audio Azur 840A
- Page 1 Azur 840A (V1 & V2) and 840E Serial Control Protocol V1.1 RS232 Protocol The protocol is accessed via COM1 i.e. the rear panel RS232C port. Command Format Command Header Group 1 to 6 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 Number 01 to 07 Main Input Selects Tape Monitor Main Input Up Main Input Down Power State Mute State Goto Volume Volume Up Volume Down Volume Stop Set Balance Balance Right Balance Left LCD Brightness... - Page 3 1.4.2 Group 2 - Setup Commands Command Command Description Number Get Software Version Get Protocol Version Set Input Name 1.4.3 Group 3 - Replies from Setup Commands Command Command Description Number Software Version Protocol Version Input Name Changed 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 Data No Data No Data...
- Page 4 1.4.4 Group 4 - Replies from Control Commands and Updates Command Command Description Number 01 to 07 Main Input Source Changed Tape Monitor Changed Power State Changed Mute State Changed Volume Changed Volume Increasing Volume Decreasing Volume Stopped Balance Changed LCD Brightness Changed Speaker Selection Changed Headphones In / Out...
- Page 5 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: This document contains proprietary information protected by copyright.