Telit Wireless Solutions GE910, Руководство пользователя по оборудованию

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GE9
GE9 GE9
GE910 Hardware User Guide
10 Hardware User Guide 10 Hardware User Guide
10 Hardware User Guide
1vv0300962 Rev.4 2012-06-25
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Mod. 0805 2011-07 Rev.2
The signals of the GE910 serial port are:
RS232
Pin
Number
Signal GE910
Pad Number
Name Usage
1 DCD - dcd_uart N14 Data Carrier Detect
Output from the GE910 that indicates the
carrier presence
2 RXD - tx_uart M15 Transmit line *see Note Output transmit line of GE910 UART
3 TXD -rx_uart N15 Receive line *see Note Input receive of the GE910 UART
4 DTR - dtr_uart M14 Data Terminal Ready
Input to the GE910 that controls the DTE
READY condition
5 GND P13 Ground ground
6 DSR - dsr_uart P14 Data Set Ready
Output from the GE910 that indicates the
module is ready
7 RTS -rts_uart L14 Request to Send
Input to the GE910 that controls the
Hardware flow control
8 CTS - cts_uart P15 Clear to Send
Output from the GE910 that controls the
Hardware flow control
9 RI - ri_uart R14 Ring Indicator
Output from the GE910 that indicates the
incoming call condition
NOTE:
According to V.24, RX/TX signal names are referred to the application side, therefore on the
GE910 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 GE910 serial port and
viceversa 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 GE910 when the module is powered off or during
an ON/OFF transition.