Telit Wireless Solutions GL865 V3, Руководство пользователя

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HW User Guide
1vv0301018 Rev. 15 Page 39 of 72 2019-01-07
The signals of the GL865 V3/V3.1 serial port are:
RS232
Pin
Number
Signal
GL865 V3/V3.1
Pad Number
Name Usage
1 DCD - dcd_uart 1 Data Carrier Detect
Output from the GL865 V3/V3.1 that
indicates the carrier presence
2 RXD - tx_uart 8 Transmit line *see Note Output transmit line of GL865 V3/V3.1
UART
3 TXD - rx_uart 7 Receive line *see Note Input receive of the GL865 V3/V3.1
UART
4 DTR - dtr_uart 4 Data Terminal Ready Input to the GL865 V3/V3.1 that controls
the DTE READY condition
5 GND 32, 33, 35, 36, 46 Ground Ground
6 DSR - dsr_uart 3 Data Set Ready
Output from the GL865 V3/V3.1 that
indicates the module is ready
7 RTS -rts_uart 5 Request to Send
Input to the GL865 V3/V3.1 that controls
the Hardware flow control
8 CTS - cts_uart 6 Clear to Send
Output from the GL865 V3/V3.1 that
controls the Hardware flow control
9 RI - ri_uart 2 Ring Indicator
Output from the GL865 V3/V3.1 that
indicates the incoming call condition
NOTE:
According to V.24, RX/TX signal names are referred to the application side,
therefore on the GL865 V3/V3.1 side these signal are on the opposite
direction: TXD on the application side will be connected to the receive line
(here named TXD/ rx_uart ) of the GL865 V3/V3.1 serial port and vice versa
for RX.
NOTE:
For a minimum implementation, only the TXD and RXD lines can be
connected, the other lines can be left open provided a software flow control
is implemented.
NOTE:
In order to avoid a back powering effect it is recommended to avoid having
any HIGH logic level signal applied to the digital pins of the GL865 V3/V3.1
when the module is powered off or during an ON/OFF transition.