WIRELESS CONNECTIVITY & SENSORS
ANR022 - Radio module cross migration guide
Pin
No.
Thyone-I
sub-GHz proprietary
module
Description
22
Not
connected
RESERVED
on sub-GHz
proprietary module
ANT-CTRL
on Adapter
board
ANT-CTRL
Pin 22
of the adapter
board controls RF switch to change
between antenna
23
GND
GND
Ground
i1
SWDIO
TEST
Debug Interface
i2
SWDCLK
TEST
Debug Interface
i3
Not
connected
TEST
i4
Not
connected
TEST
Table 3: Pin mapping between Thyone-I and
sub-GHz proprietary module
4.1.3 Antenna
Using the adapter board along with Thyone-I module, the option to switch between internal and
external antenna connection is available. The
ANT
pin (No.1, Ext_ANT in the schematic) of
the adapter board is used for an external antenna connection matched to 50
Ω
.
The
ANT-CTRL
pin (No.22) is used to switch between Thyone-I on-board PCB antenna and
the external antenna pin
Ext_ANT
of the adapter board.
The
ANT-CTRL
pin (No.22) has an internal pull-down resistor and selects in-
ternal PCB antenna by default. An external pull-up resistor on this pin shall be
avoided.
By applying a high logic level to the
ANT-CTRL
pin, the
ANT
Pin of the adapter board can
be used for external antenna connection. If
Pin 22
is left open or a low level is applied, the
Thyone-I on-board PCB antenna is used.
4.1.4 Trace design
Thyone-I Module itself complies with FCC and IC certification. For evaluation purpose, the
adapter board uses an IC to switch between the on-board PCB-antenna of the Thyone-I mod-
ule and the external RF PAD connection. Due to which the adapter board differs from the trace
design and is not approved to be FCC and IC compliant.
14
Version 1.1, July 2023
