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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
ANNA-B4 Series Overview
ANNA-B4 Series Overview
Provides a general introduction to the ANNA-B4 series of Bluetooth 5.1 LE wireless modules.
ANNA-B4 Module Application Examples
Lists various industrial and consumer applications where ANNA-B4 modules are suitable.
ANNA-B4 Series Key Features Summary
Details the main features and specifications for ANNA-B402 and ANNA-B412 variants.
ANNA-B4x2 Module Block Diagram
Illustrates the internal architecture and connectivity of the ANNA-B4x2 module.
ANNA-B4 Series Product Specifications
Summarizes the technical characteristics, including Bluetooth version, power, and module size.
ANNA-B4 Hardware Architecture
Describes the identical hardware design and nRF52833 SoC used in ANNA-B4 variants.
ANNA-B4 Software Variants
Explains the software components and differences between ANNA-B402 (Open CPU) and ANNA-B412 (u-connectXpress).
ANNA-B4 Pinout and Functions
References data sheets for detailed pin configuration and functional assignments.
System Function Interfaces
ANNA-B4 Power Supply Requirements
Details the VCC pins and recommended power supply sources for the module.
ANNA-B4 Antenna Connection Options
Covers integrated and external antenna options, including RF pin usage and PCB layout.
ANNA-B4 Module Reset Functionality
Explains how to perform a hardware reset via the RESET_N pin.
ANNA-B4 Internal Temperature Monitoring
Describes the internal sensor used for thermal shutdown and measurement.
ANNA-B4 Low Power Clock Sources
Discusses internal oscillator, external crystal, and TCXO for power saving modes.
ANNA-B4 Serial Communication Interfaces
Details support for UART and SPI interfaces, including configuration and usage.
ANNA-B4 General Purpose Input/Output Pins
Outlines the capabilities and configurations of the module's GPIO pins.
ANNA-B4 NFC Antenna Design and Configuration
Explains NFC antenna design, tuning capacitors, and pin configuration.
ANNA-B4 Debugging and Flashing Interface
Covers SWD interface support for debugging and flashing ANNA-B402 modules.
ANNA-B4 Reserved Pins
Advises against connecting to reserved pins, as they are allocated for future use.
Migrating from ANNA-B1 to ANNA-B4
Guides users on upgrading existing ANNA-B1 applications to ANNA-B4 modules.
Design-in Guidelines
ANNA-B4 Design-in Considerations
Highlights key points for successful application design with ANNA-B4 modules.
ANNA-B4 Antenna Integration Best Practices
Provides recommendations for antenna selection, placement, and PCB design.
ANNA-B4 RF Pin Antenna Interface
Details requirements for connecting external or PCB-mounted antennas via the RF pin.
ANNA-B4 Power Supply Circuitry
Covers VCC application circuits, SMPS, LDO, and battery considerations.
ANNA-B4 Grounding Requirements
Emphasizes the importance of a solid ground connection for stability and RF performance.
ANNA-B4 PCB Layout Best Practices
Offers guidelines for schematic design, floor-planning, layout, and manufacturing.
ANNA-B4 Design-in Implementation Checklists
Provides checklists for schematic and layout design to ensure proper integration.
Open CPU Software Development
ANNA-B4 Zephyr RTOS Development
Guides on using Zephyr RTOS with ANNA-B402, including setup and building.
ANNA-B4 Nordic nRF5 SDK Integration
Explains how to use the Nordic nRF5 SDK for developing applications on ANNA-B402.
ANNA-B4 Low Frequency Clock Configuration
Details how to configure the low-frequency clock source for ANNA-B4 modules.
ANNA-B4 MAC Address and Production Data
Information on reading and managing the unique Bluetooth MAC address.
Flashing ANNA-B402 Open CPU Software
Provides instructions for flashing firmware via SWD and UART interfaces.
u-connectXpress Software Operations
Updating ANNA-B412 u-connectXpress Firmware
Guides on updating the u-connectXpress software via UART and s-center.
ANNA-B4 Low Frequency Clock and Autosense
Discusses clock source settings and autosense functionality for u-connectXpress.
Handling and Soldering Procedures
ANNA-B4 Electrostatic Discharge (ESD) Safety
Details essential precautions for handling ESD-sensitive ANNA-B4 modules.
ANNA-B4 Packaging and Storage Guidelines
Refers to data sheets for information on handling, storage, and moisture sensitivity.
ANNA-B4 Soldering Recommendations
Provides guidelines for reflow soldering, cleaning, and other soldering practices.
Qualifications and Approvals
ANNA-B4 Regional Certification Status
Lists countries/regions where the ANNA-B4 module series is certified or pending.
ANNA-B4 EU Regulatory Compliance
Covers compliance with directives like RED and RoHS for the European Union.
ANNA-B4 FCC and IC Regulatory Compliance
Details compliance with FCC and ISED rules, including statements and labeling.
ANNA-B4 Japan Radio Compliance
Outlines requirements for radio equipment compliance in Japan.
ANNA-B4 Taiwan NCC Compliance
Covers warning statements and labeling requirements for Taiwan.
ANNA-B4 South Korea KCC Compliance
Details labeling and certification requirements for South Korea.
ANNA-B4 Brazil Anatel Compliance
Specifies labeling and statement requirements for Brazil.
ANNA-B4 Australia/New Zealand Compliance
Mentions compliance with AS/NZS standards and ACMA requirements.
ANNA-B4 South Africa ICASA Compliance
Details ICASA compliance, labeling, and approval requirements for South Africa.
ANNA-B4 Bluetooth 5.1 Qualification
States that the module series is qualified according to Bluetooth 5.1 specification.
Pre-approved Antennas List
ANNA-B4 Pre-approved External Antennas
Lists and describes antennas approved for use with ANNA-B4 modules.
Product Testing Procedures
ANNA-B4 Production Testing Procedures
Describes the stringent quality controls and automated testing during manufacturing.
OEM Production Testing for ANNA-B4 Integration
Guides OEM manufacturers on essential tests for integrated ANNA-B4 devices.
Antenna Reference Designs
ANNA-B4 PCB Corner Internal Antenna Design
Details the layout for an internal antenna with the module placed at the PCB corner.
ANNA-B4 PCB Edge Internal Antenna Design
Provides layout guidelines for an internal antenna with the module along the PCB edge.
ANNA-B4 External Antenna U.FL Connector Design
Describes the reference design for connecting external antennas using a U.FL connector.
ANNA-B4 PCB Ground Plane Miniaturization Examples
Shows examples of optimizing PCB layout for antenna performance with small PCBs.
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