Marantz PMD570 manual Command format, Start character End character 0Dh

RS-232C control

Connect a male (D-Sub 9 Pin) to female (D-Sub 9 Pin) straight cable for RS-232C external control by host equip- ment.

•The RS-232C host can control functions of the PMD570 externally

•The PMD570 automatically transmits status data when status is changed.

•The PMD570 will respond to status requests by transmitting the associated status data.

RS-232C specifications:

Connector pin assignment

1

2

3

4

5

6

7

8

9

pin

use

PMD570

Typical Host

1

NC

Not Connected

Not Connected

2

TX

Transmit Data

Receive Data

3

RX

Receive Data

Transmit Data

4

NC

Not Connected

Not Connected

5

GND

Ground

Ground

6

NC

Not connected

Not connected

7

RTS

RTS receive

RTS send

8

CTS

CTS send

CTS receive

9

NC

Not Connected

Not Connected

cable

D-Sub 9 pin

D-Sub 9 pin

connector

(male)

(female)

Physical specifications

Cable

Straight cable

Baud rate

9600 bps

Data bits

8 bits

Parity bit

None

Stop bit

1 bit

Flow control

CTS/RTS Hardware Flow

Flow control and timing

CTS/RTS hardware flow control

Typical Host

PMD570

RTS send

CTS out

Not Busy

H

(Normal)

L

Busy

H

L

Timing chart

Host	PMD570
		CTS
RTS
CTS		RTS
TxD		RxD
RxD		TxD

1.The host requests data by setting RTS to L.

2.Upon data request by CTS, the PMD570 responds by setting RTS to H if not busy.

3.The host checks if CTS is H and stats data output on TxD.

4.When data output finishes, the host sets RTS to H.

5.The PMD570 checks if CTS is H and sets RTS to L.

Command format
Start character:			@
End character:			0Dh
Basic format
Header	Addr	Command code		Return
@				0Dh
	1

Received okay and error codes

OK (data receive successful) (ACK): 06h

Error (data receive error) (NACK): 15h

Normal Return		Error Return
	OK
			ERR
	06h		15h

Notes:

The receiving side ignores data received prior to "@". If code data is received without receiving "@", the data receive error code will be returned.

The tolerance for send/receive clock error is ±10%. For sending a command, wait more than 20ms after reception of a response (OK, ERR or Status).

Reception of 0Dh or timeout is used to determine the end of a command. Timeout occurs 1 second after the reception of the last byte.

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