Telit Wireless Solutions ME310G1-W1, Hw Design Manual

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ME310G1 Hardware Design Guide
1VV0301588 Rev. 12 Page 48 of 96 2021-06-14
5.7.3.2. Asynchronous Serial Port (USIF1)
The serial port 1 on the ME310G1 is a +1.8V UART with 5 RS232 signals. It differs from the
PC-RS232 in the signal polarity (RS232 is reversed) and levels.
Warning: C104/RXD1 cannot have any PU or HIGH state during
BOOTING UP phase.
The following table lists the available signals:
RS232 Pin Signal Pad Name Usage
2 C104/RXD1 AA11 Transmit line
Output transmit line of ME310G1
UART
3 C103/TXD1 Y12 Receive line
Input receive of the
ME310G1 UART
Pull-up default during ON state
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/CTS1 Y14 Clear to Send
Output from the ME310G1 that
controls the Hardware flow
control
7 C105/RTS1 AA13 Request to Send
Input to the ME310G1 that
controls the Hardware flow
control
Pull-up default during ON state
Table 28: ME310G1 port signals
5.7.3.3. Auxiliary Serial Port
The auxiliary serial port on the ME310G1 is a CMOS 1.8V with only the RX and TX signals.
The signals of the ME310G1 serial port are:
PAD Signal I/O Function Type NOTE
Y10 TX_AUX O
Auxiliary UART
(TX Data to DTE)
CMOS 1.8V
AA9 RX_AUX I
Auxiliary UART
(RX Data from DTE)
CMOS 1.8V
Table 29: ME310G1 serial port signals