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ANNA-B4 series
Stand-alone Bluetooth 5.1 low energy modules
System integration manual
Abstract
This manual provides a functional overview combined with best-practice design guidelines for
integrating ANNA-B4 stand-alone Bluetooth® 5.1 low energy modules in customer applications.
ANNA-B402 provides an open CPU architecture with a powerful MCU for customer applications,
while ANNA-B412 is delivered with pre-flashed u-connectXpress software. Targeted towards
hardware and software application engineers, the document describes the hardware design-in,
software, component handling, regulatory compliance, and testing of the module. It also includes list
of approved external antennas for use with the module.
UBX-21000517 - R03
C1-Public
0
3
www.u-blox.com
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Summarization of Contents
Functional Description
1.1 Overview
General overview of the ANNA-B4 series Bluetooth 5.1 LE modules and their applications.
1.2 Example Applications
Lists various industries and use cases where ANNA-B4 modules are applicable.
1.3 Product Features
Compares key features of ANNA-B402 and ANNA-B412, including radio and interfaces.
1.4 Block Diagrams
Presents a block diagram illustrating the ANNA-B4x2 module architecture and components.
1.5 Product Description
Summarizes ANNA-B4 series characteristics including Bluetooth version, output power, and module size.
1.6 Hardware Options
States that ANNA-B402 and ANNA-B412 share identical hardware architecture based on nRF52833.
1.7 Software Options
Details software components, including radio stack, bootloader, and application differences.
1.8 Pin Configurations and Functions
Refers to ANNA-B402 and ANNA-B412 data sheets for detailed pin configuration information.
System Function Interfaces
2.1 Main Supply Input
Explains power input via VCC pins, DC/DC converter, and supply sources.
2.2 Antenna Interface
Covers integrated chip antenna, RF pin use, and antenna types.
2.3 Module Reset
Describes how to perform a hardware reset using the RESET_N pin.
2.4 Internal Temperature Sensor
Explains the internal temperature sensor's primary use for thermal shutdown.
2.5 Low Power Clock
Discusses clock sources (internal, external crystal, TCXO) for power saving modes.
2.6 Serial Interfaces
Details supported serial interfaces like UART, SPI, and I2C.
2.7 GPIO Pins
Describes GPIO pin capabilities including general purpose, timer, and interrupt functions.
2.8 NFC Interface
Explains NFC antenna design, tuning, and pin configuration.
2.9 Debug Interface
Covers SWD and JTAG debug interfaces for ANNA-B402.
2.10 Reserved Pins (RSVD)
Notes reserved pins which are allocated for future interfaces and functionality.
2.11 ANNA-B1 to ANNA-B4 Migration
Provides guidance for migrating from ANNA-B1 to ANNA-B4 modules.
Design-in
3.1 Overview
Highlights key points for application design, including antenna, power supply, and layout.
3.2 Antenna Integration Guidelines
Provides guidelines for antenna design, placement, and ground plane requirements.
3.3 Antenna Connected Through the RF Pin
Details requirements for connecting antennas via RF pin, including transmission lines and connector design.
3.4 Supply Interfaces
Discusses VCC application circuits, SMPS and LDO regulators for power supply.
3.5 GND Pins
Explains the importance of GND pins for module stability and RF performance.
3.6 General Layout Guidelines
Covers schematic design, floor-planning, layout, manufacturing, and ESD precautions.
3.7 Design-in Checklists
Provides checklists for schematic and layout design to ensure proper integration.
Open CPU Software
4.1 Zephyr
Details Zephyr RTOS, setup, and building examples for ANNA-B402 EVK.
4.2 Nordic nRF5 SDK
Covers getting started with the Nordic nRF5 SDK and creating custom board support files.
4.3 Definition of Low Frequency Clock Source
Explains clock source options for ANNA-B4, including internal and external sources.
4.4 Bluetooth Device (MAC) Address and Other Production Data
Information on managing MAC address and other production data for ANNA-B402.
4.5 Flashing Open CPU Software
Instructions for flashing open CPU software via SWD and UART interfaces.
u-connectXpress Software
5.1 Flashing ANNA-B412 u-connectXpress Software
Guides for flashing the ANNA-B412 software via UART, AT commands, or s-center.
5.2 Low Frequency Clock and Autosense
Details on low frequency clocks and autosense functionality in u-connectXpress.
Handling and Soldering
6.1 ESD Handling Precautions
Precautions for Electrostatic Discharge handling of sensitive modules.
6.2 Packaging, Shipping, Storage, and Moisture Preconditioning
Guidelines for packaging, shipping, storage, and moisture sensitivity levels.
6.3 Soldering
Covers reflow process, cleaning, potting, coating, and other soldering remarks.
Qualifications and Approvals
7.1 Country Approvals
Lists countries where the ANNA-B4 module series is certified or pending certification.
7.2 European Union Regulatory Compliance
Details compliance with EU directives like RED and RoHS.
7.3 FCC and IC Compliance
Details FCC/IC compliance, statements, exposure, labeling, IDs, and end-product requirements.
7.4 Japan Radio Equipment Compliance
Covers Japanese compliance, labeling, and user manual requirements.
7.5 NCC Taiwan Compliance
Details Taiwan NCC compliance, warning statements, and labeling requirements.
7.6 KCC South Korea Compliance
Compliance with South Korean KCC regulations.
7.7 Brazil Compliance
Compliance with Brazilian Anatel regulations.
7.8 Australia and New Zealand Regulatory Compliance
Compliance with Australian/NZ ACMA standards.
7.9 South Africa Regulatory Compliance
Compliance with South African ICASA regulations.
7.10 Bluetooth Qualification
Information on the Bluetooth 5.1 qualification status of the ANNA-B4 module.
Pre-approved Antennas List
8.1 Approved Antennas
Lists approved internal and external antennas for ANNA-B4 integration.
Product Testing
9.1 u-blox In-line Production Testing
Describes u-blox's stringent quality controls and in-line production testing procedures.
9.2 OEM Manufacturer Production Test
Focuses on OEM manufacturer testing, including assembly verification and "Go/No go" tests.
Appendix
A Glossary
Provides definitions of abbreviations and technical terms used in the manual.
B Antenna Reference Designs
Details reference designs for internal/external antennas and ground plane miniaturizations.
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