Introduction

This reference manual provides complete information on how to use the STM32WB05xZ microcontroller memory and

peripherals.

The STM32WB05xZ is a powerful and ultra-low power 2.4 GHz RF transceiver with a Cortex

-M0+ microcontroller that can

operate up to 64 MHz.

The STM32WB05xZ is suitable for the implemention of applications compliant with Bluetooth

Low Energy SIG specification.

The STM32WB05xZ also supports the angle of arrival (AoA) and angle of departure (AoD) Bluetooth

Low Energy direction-

finding features by managing:

• The constant tone extension (CTE) inside a packet

• The antenna switching mechanism for both AoA and AoD

Refer to the related device datasheet for detailed information.

The STM32WB05xZ microcontroller includes ST state-of-the-art patented technology.

Related documents

Available from STMicroelectronics web site www.st.com:

• STM32WB05xZ datasheet (DS14591)

• STM32WB05xZ errata sheet (ES0631).

For information on the Cortex

-M0+ core, refer to the corresponding Technical Reference Manuals, available from the

www.arm.com website. For information on Bluetooth

refer to www.bluetooth.com.

STM32WB05xZ ultra-low power wireless 32-bit MCU Arm

-based Cortex

-M0+

with Bluetooth

Low Energy and 2.4 GHz radio solution

RM0529

Reference manual

RM0529 - Rev 2 - November 2024

For further information contact your local STMicroelectronics sales office.

www.st.com

1 Documentation conventions

1.1 General information

For information on the Arm

Cortex

-M0+ core, refer to the Cortex

-M0+ technical reference manual, available

from the www.arm.com website.

For information on Bluetooth

refer to www.bluetooth.com website.

Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

1.2

List of abbreviations for registers

The following abbreviations are used in register descriptions:

Table 1. List of abbreviations for registers

read/write (rw or R/W) Software can read and write to these bits

read-only (r or R) Software can only read these bits

write-only (w or W) Software can only write to this bit. Reading the bit returns the reset value

read/write-once (RWOnce) Software can read these bits but write is only allowed once

read/clear (rc_w1 or RWC1)

Software can read as well as clear this bit by writing 1. Writing ‘0’ has no effect on the bit

value

read/clear (rc_w0 or RWC0)

Software can read as well as clear this bit by writing 0. Writing ‘1’ has no effect on the bit

value

read/clear by read (rc_r or RC)

Software can read this bit. Reading this bit automatically clears it to ‘0’. Writing ‘0’ has no

effect on the bit value

read/set (rs or RWS1) Software can read as well as set this bit. Writing ‘0’ has no effect on the bit value

read-only write trigger (rt_w or

RWH)

Software can read this bit. Writing ‘0’ or ‘1’ triggers an event but has no effect on the bit

value

toggle (t or RWT1) Software can only toggle this bit by writing ‘1’. Writing ‘0’ has no effect

Reserved (Res.) Reserved bit, must be kept at reset value

1.3 Glossary

This section gives a brief definition of the abbreviations used in this document:

The SoC integrates the SWD debug port (SWD-DP) which provides a 2-pin (clock and data) interface based on

the serial wire debug (SWD) protocol.

• Word: data/instruction of 32-bit length

• Half word: data/instruction of 16-bit length

• Byte: data of 8-bit length

• Double word: data of 64-bit length

• AHB: advanced high-performance bus

• APB: advanced peripheral bus

• CPU: refers to the Cortex

-M0+core

RM0529

Documentation conventions

RM0529 - Rev 2

page 2/726