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Controlling the Arcam Solo Movie via RS232

Solo Movie is fitted with an RS232 serial connector that allows remote control from a PC, or similar

device. This section of the document describes the protocol for controlling Solo Movie 2.1 or 5.1 via the

RS232 interface.

Conventions

Data transfer format

The cable is wired as a null modem:

Data transfer format

Communication between the RC and Solo Movie takes the form of sequences of bytes, with all

commands and responses having the same basic format. Communication between the two is full duplex.

Solo Movie shall always respond to a received command.

Each transmission by the RC shall be at least six bytes in the following format:

Each response by Solo Movie shall be at least seven bytes in the following format:

Arcam (A&R Cambridge Ltd), Pembroke Avenue, Waterbeach, CAMBRIDGE, CB25 9QR, England

The remote controller is referred to as the 'RC'.

All values in this section are hexadecimal values, unless otherwise specified.

Transfer rate: 38,400bps.

1 start bit, 8 data bits, 1 stop bit, no parity, no flow control.

Connector 1

Connector 2

Transfer rate: 19,200bps.

1 start bit, 8 data bits, 1 stop bit, no parity, no flow control.

STR (Start transmission): 0x21

ZN (Zone)

CC (Command code): the code for the command

NB (Number of bytes): the number of data items following this item, excluding the ETR

Data: [Byte(1) - Byte(NB)]

ETR (End transmission): 0xD

STR (Start transmission): 0x21

ZN (Zone)

CC (Command code)

RC (Reply code)

NB (Number of bytes): the number of data items following this item, excluding the ETR

Data: [Byte(1) - Byte(NB)]

ETR (End transmission): 0xD

+44 (0)1223 203200 www.arcam.co.uk/extranet

Function

Rx 3— Tx

Tx — 4 Rx

RS232 ground

RS232

(solo movie)