STMicroelectronics MB1803B-01 Wireless and Ultra Low Power Board User Manual

STMicroelectronics MB1803B-01 Wireless and Ultra Low Power Board

Product Information

Specifications

• 1 Mbyte of flash memory and 128 Kbytes of SRAM in a UFQFPN48 package
• PCB antenna on MCU RF board (MB1803)
• Comprehensive free software libraries and examples available with the STM32CubeWBA MCU Package
• Support of a wide choice of Integrated Development Environments (IDEs) including IAR Embedded
• Arm and TrustZone are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

Product Usage Instructions

Development Environment

STMicroelectronics – STM32CubeIDE is recommended for development.

Demonstration Software

• The demonstration software preloaded in the STM32 flash memory allows easy demonstration of device peripherals in standalone mode.
• The latest versions can be downloaded from www.st.com.

Conventions

Refer to Table 3 for ON and OFF settings conventions in the document.

Safety Recommendations

This product is suitable for users with basic electronics or embedded software development knowledge such as engineers, technicians, or students. Not suitable for children.

Handling the Board

• The connection pins on the board might be sharp and handled with care to avoid injury.
• Handle the board in an ESD-proof environment to avoid damaging static-sensitive devices.
• Avoid touching electric connections on the board while powered to prevent component damage.

FAQ

Q: Where can I find additional information about ordering the NUCLEO- WBA55CG board?

• A: Refer to Table 1 and additional information from the datasheet and reference manual of the target microcontroller.

Q: What are the key features of the product?

• A: The product features 1 Mbyte of flash memory, 128 Kbytes of SRAM, PCB antenna, free software libraries, and support for various IDEs.

Introduction

• MB1801B-01 is a wireless and ultra-low-power board embedding a powerful and ultra‑low‑power radio compliant with the Bluetooth® Low Energy SIG specification v5.3, IEEE 802.15.4-2015 PHY, and MAC, supporting Thread, Chip, and Zigbee®.

Features

• Ultra-low-power wireless STM32WBA55CG microcontroller based on the Arm® Cortex®‑M33 core, featuring 1 Mbyte of flash memory and 128 Kbytes of SRAM in a UFQFPN48 package
• MCU RF board (MB1803):
• 2.4 GHz RF transceiver supporting Bluetooth® specification v5.3
• IEEE 802.15.4-2015 PHY and MAC, supporting Thread, Chip and Zigbee®
• Arm® Cortex® M33 CPU with Arm® TrustZone®, MPU, DSP, and FPU – Integrated PCB antenna
• Comprehensive free software libraries and examples available with the STM32CubeWBA MCU Package
• Support of a wide choice of Integrated Development Environments (IDEs) including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE
• Note: Arm and TrustZone are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

Ordering information

To order the NUCLEO-WBA55CG board, refer to Table 1. Additional information is available from the datasheet and reference manual of the target microcontroller.

Table 1. List of available products

Codification

The meaning of the codification is explained in Table 2.

Table 2. Codification explanation

R

| STM32 package pin count:

•         C for 48 pins

| ****

48 pins

Z

| STM32 flash memory size:

•         G for 1 Mbyte

| ****

1 Mbyte

Development environment

Development toolchains

• IAR Systems® – IAR Embedded Workbench®(1)
• Keil® – MDK-ARM(1)
• STMicroelectronics – STM32CubeIDE
• On Windows® only.

Demonstration software

• The demonstration software, included in the STM32Cube MCU Package corresponding to the onboard microcontroller, is preloaded in the STM32 flash memory for easy demonstration of the device peripherals in standalone mode.
• The latest versions of the demonstration source code and associated documentation can be downloaded from www.st.com.

Conventions

Table 3 provides the conventions used for the ON and OFF settings in the present document.

Table 3. ON/OFF convention

Safety recommendations

Targeted audience

• This product targets users with at least basic electronics or embedded software development knowledge like engineers, technicians, or students.
• This board is not a toy and is not suited for use by children.

Handling the board

• This product contains a bare printed circuit board and as with all products of this type, the user must be careful about the following points:
• The connection pins on the board might be sharp. Be careful when handling the board to avoid hurting yourself
• This board contains static‑sensitive devices. To avoid damaging it, please handle the board in an ESD‑proof environment.
• While powered, do not touch the electric connections on the board with your fingers or anything conductive.
• The board operates at voltage levels that are not dangerous, but components could be damaged when shorted.
• Do not put any liquid on the board and avoid operating the board close to water or at a high humidity level.
• Do not operate the board if dirty or dusty.

Hardware layout and configuration

• NUCLEO-WBA55CG is designed around the STM32WBA55CG. The design includes a mezzanine board and an MCU RF board.
• The hardware block diagram in Figure 2 illustrates the connection between STM32WBA55CG and peripherals (ARDUINO® Uno V3 connectors, ST morpho connector, and embedded ST-LINK).
• Figure 3 helps users locate these features on the MB1803B-01 board. The mechanical dimensions of the NUCLEO-WBA55CG product are shown in Figure 4.

Power supply

The STM32WBA55CG can be supplied by an external source (between 1.8 and 3.3 V). This figure also shows the default state of the jumpers and the solder bridges.

Debug

• By default, the debug connector is not assembled on the MB1803B-01. If necessary, the connector should be soldered. In this way, it allows you to select the type of connector STDC14 or MIPI10.
• The footprint is compatible with both connectors.
• It is also necessary to add some components on the bottom side of the MB1803.
• On the table, there are the values of the components and the figure shows the location of these components.

Table 4. Components to add to support STLin-V3PWR config

Clock sources

HSE clock references

• The accuracy of the high-speed clock (HSE) of the MCU RF board is committed to a 32 MHz crystal oscillator.
• The HSE oscillator is trimmed during board manufacturing.

LSE clock references

• The accuracy of the low-speed clock (LSE) of the MCU RF board is committed to a 32.768 kHz crystal oscillator.

Reset sources

• The reset signal of MB1803B 01 is active LOW. The internal PU forces the RST signal to a high level.
• The Hardware reset is accessible on pin 12 of the CN1 connector.

RF I/O stage

• Due to FCC/ISED constraints, the antenna cannot be removable. So, the board is proposed by default with a PCB antenna. This antenna is described on AN5129 available on the ST website. Between the STM32WBA55 and the antenna, there is a passive network. This network has two functions: makes a low pass filter and matches the impedance of the PCB antenna. Both functions are merged to reduce the number of components.
• The output stage of the STM32WBA55 was optimized for this impedance of 50 ohms. That allows to facilitate the design of the external part.
• Therefore, the low pass filter was studied with an impedance of 50 ohms for the SoC side and with the antenna impedance for the other side. To simplify, the bandwidth of the antenna was not taken into account.
• Parts of harmonics are filtered internally but for silicone size and cost, they are not completely suppressed. The low pass filter is to reduce the level of the harmonic to satisfy the certifications requirements (FCC, ISED, RED, MIC,…).
  Table 8 shows the level of the harmonic expected worst case at the output of the STM32WBA55 without a filter. That allows us to determine the attenuation of the filter vs. frequency.

Table 8. Harmonic level on the STM32WBA55 without external filter (TX mode@+10dBm)

• This network is built with 5 components C12, L1, C13, L2, and C14. That guaranteed a comfortable margin in all cases.
• The study takes into account, the drift of the components (accuracy and temperature), the drift due to the PCB, and the variation of the STM32WBA55.
• Of course, depending on the component manufacturer and the specification of the PCB, these component values can change after mandatory optimization.

MCU RF board interface and pinout

Description

The ST-MCU RF board connectors (CN1 and CN2) are accessible on the top side of the board. They are used to plug the MCU RF board into the mezzanine board.

Board pinout

Table 11. Pinout of the MCU RF board connectors

Pin

number

| STM32WBA55CG

pin name

| Pin

number

| STM32WBA55CG

pin name

| Pin

number

| STM32WBA55CG

pin name

| Pin

number

| STM32WBA55CG

pin name

1| GND| 2| VDD1| 1| NC| 2| GND
3| NC| 4| NC| 3| NC| 4| NC
5| NC| 6| GND| 5| NC| 6| NC
7| GND| 8| PB9(1)| 7| PB2| 8| GND
9| BOOT0| 10| NC| 9| PB1| 10| PB4
11| NC| 12| NRST| 11| PB4| 12| PB3/SWO(1)
13| PA13| 14| GND| 13| PB3| 14| GND
15| PA14| 16| NC| 15| PA15| 16| NC
17| GND| 18| VDD3| 17| NC| 18| NC
19| NC| 20| VDDA| 19| NC| 20| GND
21| NC| 22| GND| 21| PA12| 22| PA0(1)/PA15(1)/JTDI(1)
23| NC| 24| PA7| 23| PA9(1)| 24| NC
25| GND| 26| PA6| 25| PB15/PA11(1)| 26| GND
27| NC| 28| GND| 27| PB9/PC13(1)| 28| PA12(1)
29| PA9| 30| VDD4| 29| PB0| 30| PA11
31| GND| 32| VDD5| 31| NC| 32| GND
33| PC14| 34| GND| 33| NC| 34| PB8(1)/PB15(1)
35| PC15| 36| PA2| 35| PB14| 36| NC
37| GND| 38| PA1| 37| PA11| 38| GND
39| OSC_IN| 40| GND| 39| PB6| 40| PB6
41| OSC_OUT| 42| PA5/PA8(1)| 41| PB7| 42| PB7
43| NC| 44| PA0/PA5(1)| 43| PB5| 44| GND
45| PA8| 46| GND| 45| PA10| 46| PC13
47| PB12| 48| NC| 47| NC| 48| PB8
49| GND| 50| NC| 49| VDD15| 50| GND

Optional, need to change the state of solder bridges.

MIPI10/STDC14 connector pinout

Description

• On the MCU RF Board, there is a footprint for direct debugging. This footprint is compatible with MIPI10 and STDC14 connectors. STDC14 is an extension of the MIPI10 connector.
• By default, on this footprint (CN3), the connector is not assembly. If some features are not available on the STlinkV3EC embedded on MB1801, it’s possible to solder a MIPI10 or STDC14 connector.
• That allows to use of an external debugger, Nevertheless, it will be necessary to disconnect the SWD (open SB15 and SB17 on the MB1801).

Example of connector compatible with this footprint:

• MIPI10 : FTSH-105-01-L-DV-K (SAMTEC)
• STDC14 : FTSH-107-01-L-DV-K (SAMTEC)

MIPI10/STDC14 pinout

Table 12. Pinout of the MIPI10/STDC14 connector (CN3 of the MCU RF board)

MB1801B-01 product information

Product marking

• The stickers located on the top or bottom side of all PCBs provide product information:
• First sticker: product order code and product identification, generally placed on the main board featuring the target device.

Example:

• Product order code Product identification
• Second sticker: board reference with revision and serial number, available on each PCB. Example:
• On the first sticker, the first line provides the product order code, and the second line the product identification.
• On the second sticker, the first line has the following format: “MBxxxx-Variant-yzz”, where “MBxxxx” is the board reference, “Variant” (optional) identifies the mounting variant when several exist, “y” is the PCB revision, and “ZZ” is the assembly revision, for example, B01. The second line shows the board serial number used for traceability.
• Parts marked as “ES” or “E” are not yet qualified and therefore not approved for use in production. ST is not responsible for any consequences resulting from such use. In no event will ST be liable for the customer using any of these engineering samples in production. ST’s Quality department must be contacted before any decision to use these engineering samples to run a qualification activity.

ES” or “E” marking examples of location:

• On the targeted STM32 that is soldered on the board (for an illustration of STM32 marking, refer to the STM32 datasheet Package information paragraph at the www.st.com website).
• Next to the evaluation tool order the part number that is stuck or the silk-screen printed on the board.
• Some boards feature a specific STM32 device version, which allows the operation of any bundled commercial stack/library available. This STM32 device shows a “U” marking option at the end of the standard part number and is not available for sales.
• To use the same commercial stack in their applications, the developers might need to purchase a part number specific to this stack/library. The price of those part numbers includes the stack/library royalties.

MB1801B-01 product history

Table 13. Product History

Order code| Product identification| **Product details| ****Product change description| ****Product limitations
---|---|---|---|---
** MB1803B-01| **** MB1801B-01| MCU: STM32WBA55CGU6

silicon revision “Z”

| Initial revision| No limitation
MCU errata sheet: STM32WBA55xx device errata (ES0592)
Boards: MB1803-WBA55CG-B01

Boards revision history

Table 14. Board revision history

Board reference| Board variant and revision| Board change description| Board limitations
---|---|---|---
MB1803 (MCU RF board)| MB1803-WBA55CG-B01| Initial revision| **** No limitation

Federal Communications Commission (FCC) and ISED Canada

FCC Compliance Statement

Changes or modifications not expressly approved by STMicroelectronics could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference,
2. this device must accept any interference received, including interference that may cause undesired operation.

FCC ID: YCP-MB180300

Model mane: MB1803B-01
Applicable FCC rules: This module has been approved under FCC part 15C 15.247 in the frequency range 2400-2483.5MHz. This modular transmitter is only FCC- authorized for this specific rule part.

Specific operational use conditions:

• The module is limited to OEM installation ONLY.
• Limited module procedures do not apply to this application.
• Trace antenna design does not apply to this application.

Radio Frequency (RF) Exposure Compliance of Radio communication: To satisfy FCC RF Exposure requirements, a separation distance of 20cm or more should be maintained between the antenna of this device and persons during operation.
To ensure compliance, operation at a closer distance than this is not recommended. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

• List of antenna type approved: Not applicable (Antenna is printed on the PCB module)
• End Product Labeling: if the host is marketed so that end users do not have straight forward commonly used methods for access to remove the module so that the FCC ID of the module is visible; then an additional permanent label referring to the enclosed module shall be added:

Contains Transmitter Module FCC ID : YCP-MB180300” or “Contains FCC ID: YCP-MB180300” must be used.

Additional testing requirements:

• If testing of the host product with this transmitter installed and operating is necessary (to verify that the host product meets all the applicable FCC rules), a test mode for this specific module is available upon request to STMicroelectronics.
• The host product manufacturer is responsible for compliance with any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. (For example, Part 15 Subpart B)

ISED Compliance Statement

IC: 8976A- MB180300

Product Marketing Name: MB1803B

HVIN: MB1803B-01

This device contains license-exempt transmitter(s)/receivers(s) that comply with Innovation, Science, and Economic Development Canada’s license-exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device.

Applicable ISED-CANADA rules: This module has been approved under RSS-247 in the frequency range 2400-2483.5MHz. This modular transmitter is only ISED- authorized for this specific rule part.

Specific operational use conditions:

• The module is limited to OEM installation ONLY.

• If other parameters (power setting) other than the type documented in the filing, a class 2 permissive change must be filed with ISED-CANADA.

• Limited module procedures do not apply to this application.
  Trace antenna design does not apply to this application.

• Radio Frequency (RF)   Exposure Compliance of Radio communication: To satisfy ISED-Canada RF Exposure requirements, a separation distance of 20cm or more should be maintained between the antenna of this device and persons during operation. To ensure compliance, operation at a closer distance than this is not recommended. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

• This radio transmitter IC: 8976A-MB180300 has been approved by Innovation, Science and Economic Development Canada to operate with the PCB antenna printed on the module.

List of antenna type approved: Not applicable

• End Product Labeling: If the IC number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains IC: 8976A-MB180300”

Additional testing requirements:

• If testing of the host product with this transmitter installed and operating is necessary (to verify that the host product meets all the applicable ISED-Canada rules), a test mode for this specific module is available upon request to STMicroelectronics.
• The host product manufacturer is responsible for compliance with any other ISED rules that apply to the host not covered by the modular transmitter grant of certification. (For example, ICES-003)

RED Compliance Statement

Simplified UE compliance statement Hereby, STMicroelectronics declares that the radio equipment type ” MB1803B-01″ complies with Directive 2014/53/EU.

UKCA Compliance Statement

SIMPLIFIED UK DECLARATION OF CONFORMITY

Hereby, the manufacturer STMicroelectronics, declares that the radio equipment type “MB1803B-01” complies with The UK Radio Equipment Regulations 2017 (UK S.I. 2017 No. 1206).
The full text of the UK declaration of conformity is available at the following internet address: www.st.com

Revision history

Table 15. Document revision history

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