Transmission Data Format; Transmission Data Format From Host To Slave; Form1: Command; Form2: Status Request - Marantz SR7300 Specification

SR7300/SR7300OSE

3-2. Transmission data format

3-2-1. Transmission data format from Host to Slave

There are two kinds of transmission data form from Host shown below.

3-2-1-1. Form1: Command

Command is a data that requests some status change.
Start character
ID
COMMAND
End character
S tart
'@ '

3-2-1-2. Form2: Status request

Status request is a data that requests a answer of some status.
Start character
ID
Request character : '?'
Request status
End character
S tart
'@ '

3-2-2. Transmission data format from Slave to Host

There are two kinds of transmission data form from Slave shown below.

3-2-2-1. Form1: ACK/NAK

ACK is a reply data from Slave when Slave got an acceptable command data from Host.
ACK
A C K
0 6 h
NAK is a reply data from Slave when Slave got an incorrect Command data, Status request data or
some other data from Host.
NAK
N A K
1 5 h

3-2-2-2. Form2: Status answer

Status answers are reply data when Slave got an acceptable Request status data from Host.
Start character
ID
Answer character
End character
S tart
'@ '
Hardware Software Interface (HSI) Spec.
: '@'
: '0' ~ '9' (A Slave has own ID, A Host has to set the ID.)
: see "Command list"
: 0Dh
C O M M A N D
I D
: '@'
: '0' ~ '9' (A Slave has own ID, A Host has to set the ID.)
: see "Status request list"
: 0Dh
R e qu e st statu s
I D
'?'
: 06h
: 15h
: '@'
: '0' ~ '9' (A Slave will set own ID.)
: see "Status answer list"
: 0Dh
S tatus answ er
I D
Document Version [2.01]
E n d
0 D h
E n d
0 D h
E nd
0D h
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