User's Guide

LE920A4 HW User Guide Module Connections
Doc#: 1VV0301261 Pin-out
Rev. 4.7.1 Page 36 of 124 2019-11-21
PAD Signal I/O Function Type Comment
AJ20 Reserved - Reserved
AL20 Reserved - Reserved
AN20 Reserved - Reserved
R18 Reserved - Reserved
S19 Reserved - Reserved
U19 Reserved - Reserved
L18 Reserved - Reserved
J18 Reserved - Reserved
H1 Reserved - Reserved
AE4 Reserved - Reserved
AC4 Reserved - Reserved
WARNING:
GPIO_20 and WCI_RX are used as special HW flags during boot.
If they are used as GPIOs, they must be connected via a 3-state buffer to
avoid any undesirable effect during the boot.
NOTE:
When the UART signals are used as the communication port between the
Host and the Modem, RTS must be connected to GND (on the module side)
if flow control is not used.
If the UART port is not used, UART signals can be left floating.
NOTE:
Unless otherwise specified, RESERVED pins must be left unconnected
(floating).
The only exceptions are listed in the Section 3.2, Signals That Must Be
Connected.