Samsung SCC-ZM395 User Manual
Version 1.1
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5. Communication
1) Connection
◆ Data Communication : Start-Stop Synchronized serial interface
◆ Data length : 8bit data
◆ Stop bit
:
1 bit
◆ Parity
:
None
◆ Baudrate
:
4800, 9600, 19200, 38400 bps
※default value : 9600 bps
2) Communication Protocol
◆ All communication data consist of nine bytes.
◆ Communication data start with A0(h).
◆ The format of the communication data is shown below.
9 Byte Fixed
Byte1
Byte 2
Byte 3
Byte 4~8
Byte 9
Start Code
A0H(1)
Sender
Address(1)
Target
Address(1)
Command (5)
Check sum
(1)
Data Byte
Type
Contents
Remarks
Byte 1
Start Code
A0H
Data Packet Starting Point
Byte 2
Sender Address
Sender address
Byte 3
Target Address
Target address
Byte 4
Command
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
Check Sum
LSB* of
(FFFFH - ( Sum from Byte2 to Byte8))
※ Checksum calculating example
Example of Pan(Left) command with motor speed 20H.
In this example, camera's address is 01H.
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
00H
01H
01H
00H
01H
20H
00H
DCH
Sum from Byte2 to Byte8 = 23H
∴ FFFFH - 23H = FFDCH ; LSB of FFDCH=DCH
∴ Check Sum : DCH
◆ Ack. Format
Samsung communication utilizes Ack. codes. When controller sends a command,
the camera sends back an Ack. This is our basic procedure to make sure that the
communication and the camera function are properly executed.