ME310G1 Hardware Design Guide
1VV0301588 Rev. 12
Page 46 of 96
2021-06-14
PAD
Signal
I/O
Function
Type
NOTE
Y6
SPI_CS
I/O
SPI Chip Select
CMOS 1.8V
Table 26: Available signals
Note: The SPI interface is supported through the Telit AppZone APIs.
Serial Ports
The ME310G1 module is provided by 3 Asynchronous serial ports:
•
Asynchronous Serial Port (USIF0)
•
Asynchronous Serial Port (USIF1)*
•
Auxiliary Serial Port
Several configurations can be designed for the serial port on the OEM hardware, but the
most common are:
•
RS232 PC com port
•
microcontroller UART @ 1.8V (Universal Asynchronous Receive Transmit)
•
microcontroller UART @ 5V or other voltages different from 1.8V
Depending on the type of serial port on the OEM hardware, a level translator circuit may
be needed to make the system work. On the ME310G1 the ports are CMOS 1.8.
Note:*The USIF1 is currently NOT supported by ME310G1 firmware.
5.7.3.1.
Asynchronous Serial Port (USIF0)
The serial port 0 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.
The following table is listing the available signals:
RS232 Pin
Signal
Pad
Name
Usage
2
C104/RXD0
AA15
Transmit line
Output transmit line
of ME310G1 UART
3
C103/TXD0
Y16
Receive line
Input receive of the
ME310G1 UART
Pull-up default
during ON state
