CB-ACC-36【PDF 50/58 页】ANTENNA 1/2WV 2.4GHZ 10CM RPSMA

Version 1.17 2011-09

A.2.2 Serial Interface

The serial interface of the module is Logic Level logic levels and the module can be con-

nected to an external CPU (see section A.2.2.1).

An external driver is needed if the module should be on another physical interface like

RS232 or RS485/RS422 (see section A.2.2.2 - A.2.2.4).

CTS (Clear To Send) and RTS (Request To Send) are used for hardware flow control.

DSR (Data Set Ready) can be used to make a connect attempt. See the Serial Port Adapter

AT commands specification.

DTR (Data Terminal Ready) can be used to detect if the module is up and running and ready

to receive data.

Note! The module must be configured to flow control none if hardware flow control is

not used, see the Serial Port Adapter AT Commands specification for more info.

A.2.2.1 Logic level Mode

The serial UART interface can be used in a host controller application with a UART interface.

The design of the interface depends on the power supply voltage of the host system; see

Figure 14 for a 3.0/3.3V host system and Figure 15 for a 5V host system.

Figure 14: A complete UART interface with a

3.0/3.3V host system.

Figure 15: A complete UART interface with a 5V host

system.

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