Sierra Wireless AirLink GL8200, Руководство пользователя

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4116298 Rev 7.0 November 07, 2016 20
Product Technical Specification and
User Guide
Interfaces/Peripherals
Modem
(DCE)
DTE
RS232-TXD
GND
RS232-RXD
RS232-RTS
RS232-CTS
RS232-DTR
4
3
2
1
5
TX
RX
RTS
CTS
DTR
Figure 7. 5-wire RS232 Serial Link Signals
2.2.1.2.1. Pin Description
Table 9. Serial Link Pin Description from the Micro-Fit Connector (CN201)
Pin # Signal* I/O** I/O Type Reset State Description
1 RS232-CTS O RS-232 Z Clear To Send
2 RS232-RTS I RS-232 Z Request To Send
3 RS232-RXD O RS-232 1 Receive Serial Data
4 RS232-TXD I RS-232 Z Transmit Serial Data
5 RS232-DTR I RS-232 Z Data Terminal Ready
6 GND - GND Ground
* According to PC (DTE) view.
** According to modem (DCE) view, from which the direction of the signal is defined.
The RS232 interface has been designed to allow flexibility in the use of the serial interface signals.
However, the use of TX and RX signals are mandatory; while the use of CTS, RTS and DTR signals
are optional.
Note: The modem is designed to operate with Hardware Flow Control. It is recommended to use RS232-
RTS and RS232-CTS for hardware flow control in order to avoid data corruption during
transmission.
The modem also implements the Serial Port Shutdown feature with the DTR signal. It is
recommended to use RS232-DTR signal to benefit from the current consumption improvement
performed by this feature. For more information about the Serial Port Shutdown, refer to section
6.2.2 Serial Port Shutdown Mode.
2.2.1.2.2. 4-wire Serial Interface Hardware Design
The signals used in this interface hardware design are as follows:

RS232-TXD

RS232-RXD

RS232-CTS

RS232-RTS