Rs 232 Protocol

7/31/2019 Rs 232 Protocol

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Sony Amplifier/Receiver

RS-232C Control Protocol Specification


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1.IntroductionThis specification describes the RS232C communication protocol between anAmplifier and a Host Controller.

2. OutlineFrom the system controller, a command is transmitted to the Amplifier from theHost Controller, and the Amplifier / Receiver. A received command changes aninternal state according to the contents of the message, or answers the HostControllers requested Status.

3. Communication format

It is Based on RS-232C format.

Baud Rate : 9600bpsData Bits : 8bitParity : NoStop Bits : 1

4. Regulation on communication

-Amplifier must return a message of less than 500m sec onreception of a command from Host Controller.

-Host Controller must not transmit the following command, beforereceiving the reply from the Amplifier to a transmitting command.

-Host Controller must not open 10 or more m seconds of sending-outintervals of each byte in a transmitting message.

-As long as there is no request from Host Controller, even ifAmplifier changes internal status etc., it must not transmita message to Host Controller.

5. Data Format (Host Controller Amplifier)

STX + BC + PDC + CMD + Data1 + ----- + DataN + CS

The terminological definition is as follows.

STX 02 H : Start of text code

BC : Byte Count(Number of bytes of until before CS from PDC.)

PDC : Product Code

CMD : Command (Opecode)

DataN : Data Block ( 0 < M + FAH )

CS : Check SumA value from which 8 bits of low ranks of the sum

from BC to CS are set to 0.


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As an exception,

ACK 0xFD HNACK 0xFE H

are defined as a 1byte reply message from Amplifier, and it is usedwhen the value of CMD in the command transmitted from Host Controlleris 0x00 to 0x7f.

If a reply from the Amplifier is other than ACK/NACKIt assumes that a request is answered in the form of the specified protocol and the details

are the specifications of each category.When a command cannot be executed, or when there is no function to acommand, it assumes that the following 4-byte command request has been answered.

NO-EXECUTABLE .... STX + BC + xxH(PDC) + 0E HNO-FUNCTION .... STX + BC + xxH(PDC) + 0F H

NO-EXECUTABLE is answered, when as follows.Although OPECODE(CMD) is understood,

-The contents of an argument have mistaken.-Amplifier does not correspond to the contents of an argument.-A command cannot be executed in the present state.

NO-FUNCTION is answered when Amplifier cannot recognize a command on

an OPECODE(CMD) level.

6. About the specifications of each categoryThe contents from PDC to DATAN are described on the specifications

of each category.

STX + BC + PDC + CMD + Data1 + -------- + DataN + CS|____________________________________|

7. Operation in POWER OFF.When amplifier is powered off, only the following commands can be received.

-Amplifier Category - POWER ON Command

-Amplifier Category - STATUS REQUEST Command

About the command of others from Host Controller, amplifier answers NACK.


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Pr odu ct Code Li s t


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Amp Category



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AMP Comma nd Li s t ( 0x A0* *)


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Amp St a t us Li s t ( 0x A8* *)


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Ampl i f i e r a ns we r s ACK/ NACK t o t he f ol l owi ng Comma nd.


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Cat e gor y 0xa 0

CODE: 0x82

f unct i on:

f or ma t :

Cat e gor y 0xa 8

CODE: 0x82f unct i on:

f or ma t :

St a t us Re q

Ope r a ndLen gt h Cont e nt s

St a t us _Da t a

Ope r a ndCont e nt sLen gt h


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Ca t eg or y 0xa0

CODE: 0x92f unc t i on:

f or ma t :

Ca t eg or y 0xa8CODE: 0x92 Vol ume St a t u s Da t a

f unc t i on:

f or ma t :

Vol ume St a t u s Re q

Ope r an dLengt h

Cont ent s

Ope r an dLengt h Cont ent s


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Ca t eg or y 0xa0


f or ma t :

I nput Se l ec t

Ope r an dLengt h

Cont e nt s


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Ca t eg or y 0xa0


f or ma t :

Mut e Se t

Ope r an dLengt h Cont e nt s


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Ca t eg or y 0xa0


f or ma t :

Ope r an dLengt h Cont e nt s

Powe r Se t


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Cat e gor y 0xa0

CODE: 0x52f unct i on:

f or ma t :

Vol ume Se t

Ope r a ndLen gt h Cont ent s


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Ca t eg or y 0xa0


f or ma t :

Lengt h

Cont e nt s

12V Tr i gg e r

Ope r an d


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Invalid

32766

32765

256

2

1

0

-1

-2

-256

-32766

-32767

Reserved8


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Ca t eg or y 0xa8

CODE: 0x0e

f unc t i on:

f or ma t :

Ca t eg or y 0xa8

CODE: 0x0f

f unc t i on:

f or ma t :

No- Exe c ut a bl e

No- Func t i on


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Sound Adaptor Category



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SOUND Ada pt or Comma nd Li s t ( 0x A3* *)


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Sound Ada pt or St a t us Li s t ( 0x


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Ca t eg or y 0xa3


f or ma t :

Ca t eg or y 0xab

CODE: 0x82

Lengt h

SF St a t us Re q

Ope r an d Cont e nt s

SF St a t us Da t a


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Ca t eg or y 0xa3


f or ma t :

Lengt h

SF Se l e c t

Ope r an d Cont ent s


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Ca t eg or y 0xab

CODE: 0x0e

f unc t i on:

f or ma t :

Ca t eg or y 0xab

CODE: 0x0f

f unc t i on:

f or ma t :

No- Func t i on

No- Exe c ut a bl e


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O O O O

O O O O

O O O O

O O O O

O O O OO O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

O O O O

X X X X

X X X X

X X X X

O NOT

X


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Audio Tuner Category



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am

f m

Audi o Tune r Comma nd Li s t ( 0xA1**)


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Audi o Tune r St a t us Li s t ( 0xA9**)


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manua l _t uni n g+

manua l _t uni n g-

a m

f m


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Ca t eg or y 0xa1


f or ma t :

Ca t eg or y 0xa9

CODE: 0x82

Lengt h

St a t us Re q

Ope r an d

St a t us Da t a

Cont ent s


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Cat e gor y 0xa1

CODE: 0xa3f unct i on:

f or ma t :

Lengt h

Cat e gor y 0xa9

CODE: 0xa3

Lengt h

Pr e s e t Da t a Re q

Pr e s e t Da t a




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Ca t eg or y 0xa1


f or ma t :

Lengt h

Pr e s e t Se l e c t

Ope r an d Cont ent s


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Ca t eg or y 0xa1

CODE: 0xa4f unc t i on:

f or ma t :

Lengt h

Ca t eg or y 0xa9

CODE: 0xa4

Lengt h

Pr e s e t Na me Re q

Pr e s e t Na me Da t a




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Ca t eg or y 0xa9

CODE: 0x0e

f unc t i on:

f or ma t :

Ca t eg or y 0xa9

CODE: 0x0f

f unc t i on:

f or ma t :

No- Func t i on

No- Exe c ut a bl e


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Lengt h

PRESET Da t a :

BANK t yp e = SHI FT ( SHI FT_ DATA)

Cont en t s

BANK Ty pe = BAND ( BAND_DATA)BANK t ype

Documents

Rs 232 Protocol