4116298
Rev 7.0
November 07, 2016
21
Product Technical Specification and
User Guide
Interfaces/Peripherals
Modem
(DCE)
DTE
RS232-TXD
GND
RS232-RXD
RS232-RTS
RS232-DTR
4
3
2
1
5
TX
RX
RTS
CTS
DTR
RS232-CTS
Figure 8.
4-wire Serial Link Implementation
Note:
The RS232-DTR signal must be managed following the V24 protocol signaling if the Sleep Mode
and Serial Port Shutdown features are to be used.
2.2.1.2.3.
2-wire Serial Interface Hardware Design
This is the default serial interface configuration when the module is shipped. The signals used in this
interface hardware design are as follows:
RS232-TXD
RS232-RXD
Modem
(DCE)
DTE
RS232-TXD
GND
RS232-RXD
RS232-RTS
4
3
2
1
TX
RX
RTS
CTS
RS232-CTS
5
RS232-DTR
DTR
Figure 9.
2-wire Serial Link Implementation
Note:
When reverting to a 2-wire serial interface implementation from either a 5-wire or 4-wire
implementation, the modem must be configured using AT commands
AT+KGPIO=7,0
and
AT+KSLEEP=2
before the 2-wire serial interface is re-implemented.
The RS232-DTR signal must be managed following the V24 protocol signaling if the Sleep Mode
and Serial Port Shutdown features are to be used.
The RS232-CTS and RS232-RTS signals are not used in this configuration. If needed, AT commands
AT&K3
and
AT&W0
can be used to enable the flow control function on the embedded module.
For more information about AT commands applicable to the GL8200, please refer to the commands
marked as supported by HL8548 in document [2] AirPrime HL6 and HL8 Series AT Commands
Interface Guide.
Содержание AirLink GL8200
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