3.3

Antenna

The rectangular module has one shorter side clearly different from the remaining finish surface. This side is

unshielded and the mold cover contains the integrated antenna.

To use the internal antenna, pin 51 (ANT_INT) and pin 50 (ANT_EXT) must be connected as in Figure 2.

If an external antenna is used, ANT_IN must be shorted to ground, and ANT_OUT connected to the external

antenna matching network and to the antenna itself, as in Section 3.3: Antenna.

Figure 2. Shorted pins to use internal antenna

Pin 50, ANT_OUT

Pin 51, ANT_IN

3.4

OTP

The STM32WBA5MMG features a 1-Kbyte one-time programmable (OTP) memory for use by the end product

(see details in DS14127 and RM0493).

Note:

The device uses the first and last words of this area for trimming and identification purposes. As a consequence,

addresses 0xBF90000h to 0xBF9000Fh and 0xBF090190h to 0xBF901FFh cannot be changed.

STM32WBA5MMG

Module overview

DS14801 - Rev 3

page 6/25