Marantz ST-7001-RS-232C Control Specification

ST7001 RS232C Control

Specification: Rev.1.01

Marantz

RS232C Control Specification

for

ST7001

Category

Document Version

: Stereo Tuner

: 1.01

Date

Number of Page

: 2006/08/10

: 14

Marantz America, Inc. 2006

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of copyright.

All specifications might be subject to change without notice.

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Document Version [1.01]

Table of Contents

Global Description ................................................................................................................................................ 3

1-1. Overview........................................................................................................................................................... 3

1-2. Block Diagram.................................................................................................................................................. 3

1-3. Interface connection specification of the product........................................................................................... 3

1-4. Assumptions and Dependencies.................................................................................................................... 3

2. Detailed Description..............................................................................................................................................4

2-1. Connection format ........................................................................................................................................... 4

2-1-1. Physical connection................................................................................................................................. 4

2-1-1-1. Data transmission sequence from Host to Slave ..........................................................................4

2-1-1-2. Data transmission sequence from Slave to Host ..........................................................................4

2-2. Transmission data format................................................................................................................................ 5

2-2-1. Transmission data format from Host to Slave........................................................................................ 5

2-2-1-1. Form1: Command ........................................................................................................................... 5

2-2-1-2. Form2: Status request ..................................................................................................................... 5

2-2-2. Transmission data format from Slave to Host........................................................................................5

2-2-2-1. Form1: ACK/NAK ............................................................................................................................ 5

2-2-2-2. Form2: Status answer and Auto status feedback.......................................................................... 5

2-3. The transaction sequences and the regulations............................................................................................ 6

2-3-1. The transaction sequences..................................................................................................................... 6

2-3-2. The transaction regulations..................................................................................................................... 6

2-3-3. Specification of Auto status feedback ..................................................................................................... 6

2-3-4. Example of the transactions.................................................................................................................... 6

2-3-5. Examples of the handshaking flowchart ................................................................................................7

2-3-5-1. Example of successful handshaking.............................................................................................. 7

2-3-5-2. Examples of handshaking error...................................................................................................... 7

3. Recommendations of Command, Status and Layer definition..................................................................... 8

4. Definitions of Command, Status and Layer......................................................................................................9

4-1. Commands....................................................................................................................................................... 9

4-1-1. Normal Command list.............................................................................................................................. 9

4-2. Status request and Status answer list...........................................................................................................12

4-2-1. Normal Status request and Status (answer and feedback) list........................................................... 12

4-2-2. Special Status request and Status answer list .....................................................................................13

4-2-3. Layer of the statuses .............................................................................................................................14

5. Revision history...................................................................................................................................................14

Company Restricted

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Document Version [1.01]

1. Global Description

1-1. Overview

A Host controller can control or watch out the product as a Slave very easily via the communication cable.

1-2. Block Diagram

* The product has D-SUB 9pin male connector. * RS232C cable has to be the Straight type

1-3. Interface connection specification of the product

uP Interface Signal name Connection device D-Sub Pin Connecter

1-4. Assumptions and Dependencies

HOST

(Controller)

- N.C. - 1 TxD (output) 2 UART RxD (input)

- N.C. - 4

- GND GND 5

- N.C. - 6

- N.C. - 7

- N.C. - 8

- N.C. - 9

RS232C cable (straight)

RS232C

Level shift driver

SLAVE

(The product) Connector

D-SUB (9pin, male)

S232C D-SUB (9pin,male)

Company Restricted

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Document Version [1.01]

2. Detailed Description

The interface specification between the product and a Host controller is described below.

2-1. Connection format

2-1-1. Physical connection

Host (Controller) Slave (the product)

(Serial setting <RS232C basic>) Baud Rate : 9600bps

TxD

Data Bits : 8bit Parity : None

RxD

Stop bit : 1bit

Handshaking : None

2-1-1-1. Data transmission sequence from Host to Slave

Host (Controller) Slave (The product)

2-1-1-2. Data transmission sequence from Slave to Host

GND

TxD → RxD

RxD ← TxD

1. Host starts a data transmission from TxD.

2. Host performs the data transmission of the number of required bytes, and ends a transmission.

Host (Controller) Slave (The product)

TxD → RxD

RxD ← TxD

1. Slave starts a data transmission from TxD.

2. Slave performs the data transmission of the number of required bytes, and ends a transmission.

RxD

TxD

GND

Company Restricted

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Document Version [1.01]

2-2. Transmission data format

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

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

2-2-1-1. Form1: Command

Command is a data that requests some status change. Start character : ’@’ COMMAND : see “Command list”

End character (CR) : 0Dh

Start

‘@’

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

Status request is a data that requests an answer of some status. Start character : ’@’ Request status : see “Status request list”

Request character : ‘?’ End character (CR) : 0Dh

Start

‘@’

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

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

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

ACK is a reply data from Slave when Slave got an acceptable command data from Host.

(ACK is sent to Host when Slave has no related status by the Command.)

Start character : ’@’, ACK : 06h, End character (CR) : 0Dh

‘

NAK is a reply data from Slave when Slave got an incorrect Command data, Status request data or

some other data from Host.

Start character : ’@’, NAK : 15h, End character (CR) : 0Dh

2-2-2-2. Form2: Status answer and Auto status feedback

Status answers are reply data when Slave got an acceptable Request status or Command data from

Host. Auto status feedbacks are sent to Host data when a Slave’s status is changed. Start character : ’@’ Answer character : see “Status list”

End character (CR) : 0Dh

Start

‘@’

Command

“xxx:”+”...”

Request status

“xxx:?”+”...”

ACK

06h

’

NAK

15h

‘

’

Status

“xxx:”+”...”

End

0Dh

End

0Dh

End

0Dh

Company Restricted

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