Telit Wireless Solutions NE310L2, Руководство по конструкции аппаратуры

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NE310L2 Hardware Design Guide
1VV0301711 Rev. 2 Page 31 of 64 2021-06-22
5.7.2.1. Asynchronous Serial Port (USIF0)
The serial port 0 on the NE310L2 is a +1.8V UART with 5 RS232 signals. It differs from the
PC-RS232 in the signal polarity (RS232 is reversed) and levels.
The following table is listing the available signals:
RS232 Pin Signal Pad Name Usage
2 C104/RXD0 AA15 Transmit line
Output transmit line
of NE310L2 UART
3 C103/TXD0 Y16 Receive line
Input receive of the
NE310L2 UART
Pull-up default
during ON state
4 DTR (*)
Data Terminal
Ready
Input to the NE310L2
that controls the DTE
READY condition
5 GND
A3, A7, A9, A13, A17, B4, B6, B10, B12,
B14, B16, C19, D18, F8, F12, F18, G19,
H6, H14, J19, K18, M18, N19, P6, P14,
T8, T12, U1, V2, W19, Y2, Y4
Ground Ground
8 C106/CTS0 AA17 Clear to Send
Output from the
NE310L2 that
controls the
Hardware flow
control
7 C105/RTS0 Y18 Request to Send
Input to the NE310L2
that controls the
Hardware flow
control
Pull-up default
during ON state
9 RING (*) Ring Indicator
Output from the
NE310L2 that
indicates the
incoming call
condition
Table 15: Available signs * Alternate function with GPIO, refer to par. General Purpose I/O