© 2013 Intertec Components GmbH, Erdinger Str. 45, 85356 Freising.
www.intertec.org
4
User Manual
1. Serial Interface
1.1 Baud Rate
The ITV-GECWV407M supports total 5 types of baud rate: 9,600bps, 19,200bps,
38,400bps, 57,600bps and 115,200bps.
Default
baud rate is
115,200bps
. In other words,
host needs to use 115200bps at the first connection with ITV-GECWV407M. After the first
connection, host can change the baud rate to other supported values.
1.2 Single Byte Timing Diagram
A single byte RS-232 transmission consists of one start bit, 8-bit contents and one stop bit.
A start bit is always 0, while a stop bit is always 1. LSB is sent out first and is right after the
start bit.
Figure 5 RS232 communications
– single byte timing diagram
1.3 Command Timing Diagram
A single command consists of 4 or more (depends on
data length
’s value) continuous
single byte RS-232 transmissions. The following is an example of
GET VERSION
(56h,
00h, 11h, 00h) command.
