BLUENRG-M2SA

BlueNRG-M2 Datasheet Very low power application processor module for Bluetooth® low energy v5.2 Features • • • • Bluetooth v5.2 certified Supports master and slave modes – – Multiple roles supported simultaneously – LE data packet length extension Embedded ST BlueNRG-2 BLE SoC – High performance, ultra-low power Cortex-M0 32-bit based core – Programmable embedded 256 kB Flash – 24 kB embedded RAM with data retention – Up to +8 dBm available output power – Down to -88 dBm Rx sensitivity – Up to 96 dB link budget with excellent link reliability Embedded BALF-NRG-02D3 integrated matched balun with harmonic filter Interfaces: 1 x UART, 1 x I2C, 1xSPI, 14 x GPIO, 2 x multifunction timer, 10-bit ADC, watchdog and RTC, DMA controller, PDM stream processor, SWD debug interface On-board chip antenna (BLUENRG-M2SA) or PCB antenna (BLUENRG-M2SP) Small form factor: 11.5 mm x13.5 mm Complemented with Bluetooth low energy protocol stack library (GAP, GATT, SM, L2CAP, LL) AES secutity co-processor Bluetooth low energy SDK with a wide range of available profiles Certification – CE qualified – FCC, IC modular approval certified – TYPE qualified – BQE qualified – WPC certification – SRRC certification (BlueNRG-M2SA) – KCC cerification Pre-programmed UART bootloader Operating supply voltage: from 1.7 to 3.6 V Operating temperature range: -40 °C to 85 °C – • • • Product status link BlueNRG-M2 • • • Product label • • • Applications • • • • • • • Internet of Things Smart Home Building and industrial automation Smart Lighting Remote and access control Fitness, wellness and sports Consumer medical DS13053 - Rev 7 - December 2021 For further information contact your local STMicroelectronics sales office. www.st.com BlueNRG-M2 • • • Security and proximity Assisted living PC and smart phone peripherals Description The BlueNRG-M2 is a Bluetooth® low energy system-on-chip application processor certified module, certified under BT specifications v5.2 and BQE qualified. The BlueNRG-M2 module supports multiple roles simultaneously and can act at the same time as Bluetooth master and slave device. The BlueNRG-M2 is based on the BlueNRG-2 system-on-chip and entire Bluetooth low energy stack and protocols are embedded into module. The BlueNRG-M2 module provides a complete RF platform in a tiny form factor. Radio, embedded antenna and high frequency oscillators are integrated to offer a certified solution to optimize the time-to-market of the final applications. The BlueNRG-M2 can be powered directly with a pair of AAA batteries or any power source from 1.7 to 3.6 V. DS13053 - Rev 7 page 2/31 BlueNRG-M2 General description 1 General description The BlueNRG-M2 is a Bluetooth low energy application processor modules certified under Bluetooth® v5.2 specifications. The BlueNRG-M2 module has been designed around the ST BlueNRG-2 SoC where its Cortex-M0 core can execute both Bluetooth protocols and customer application. Optimized memory architecture includes 256 kB of Flash memory and 24 kB of ultra-low-leakage RAM (with full data retention). A complete power-optimized Bluetooth stack library provides: • Master, slave, multiple role support • GAP: central, peripheral, observer or broadcaster roles • Simultaneous advertising and scanning • Capability of being slave of up to two masters simultaneously • ATT/GATT: client and server • SM: privacy, authentication and authorization • L2CAP • Link Layer: AES-128 encryption and decryption In the BLUENRG-M2SA module both 32 MHz and 32 kHz crystal oscillators are available. It has been designed to leverage the BlueNRG-2 integrated DC-DC step down converter in order to achieve the best power consumption in active mode. It also embeds a high efficiency chip antenna. It can be configured to support both application processor (host-less) and network processor (hosted) modes. Being based on the BlueNRG-2 SoC, the BlueNRG-M2 module leverages all tools and documentation of its ecosystem: development kit, application notes, user manuals, design notes & Tips. A wide set of sample programs are also available in C source code. The BlueNRG-M2 module has a wide set of peripherals available for customer applications (1 x UART interface, 1 x SPI interface, 1 x I2C interface, 14 GPIO, 2 x multifunction timer, 10-bit ADC, watchdog & RTC, DMA controller, PDM stream processor). The BlueNRG-M2 module enables wireless connectivity into electronic devices, not requiring any RF experience or expertise for integration into the final product. The BlueNRG-M2 module provides a complete RF application platform in a tiny form factor (11.5 x 13.5 x 2.0 mm) and being a certified solution optimizes the time to market of the final applications. The BlueNRG-M2 module allows applications to meet the tight advisable peak current requirements imposed with the use of standard coin cell batteries. Optimized results are obtained when the embedded high-efficiency DC-DC step-down converter is used (BLUENRG-M2SA). Instead, for the BLUENRG-M2SP the best performance in terms of power consumption is achieved using a 1.8 V DC power supply. The BlueNRG-M2 can be powered directly with a standard 3 V coin cell battery as with a pair of AAA batteries or any power source from 1.7 to 3.6 V. DS13053 - Rev 7 page 3/31 BlueNRG-M2 Block diagram 2 Block diagram Figure 1. HW block diagram for the BlueNRG-M2 DS13053 - Rev 7 page 4/31 BlueNRG-M2 Software architecture 3 Software architecture 3.1 Software development kit The BlueNRG-M2 module embeds the BlueNRG-2 application processor. Refer to the BlueNRG-2 web page (http://www.st.com) to get access to: • BlueNRG-2 datasheet • development kit • Application notes • User manuals • Tools and software • Design note and tips Software and firmware should be configured taking into account the BlueNRG-M2 specific configuration as described in Section 2 Block diagram. The BLUENRG-M2SA module has: • 32 MHz crystal oscillator • 32 kHz crystal oscillator • SMPS DC-DC converter • 10 µH SMPS inductor The projects provided with the development kit should be customized defining as following: • HS_SPEED_XTAL=HS_SPEED_XTAL_32MHZ • LS_SOURCE=LS_SOURCE_EXTERNAL_32KHZ • SMPS_INDUCTOR=SMPS_INDUCTOR_10uH The BLUENRG-M2SP module has: • 32 MHz crystal oscillator • LDO converter The projects provided with the development kit should be customized as follows: • HS_SPEED_XTAL=HS_SPEED_XTAL_32MHZ • LS_SOURCE=LS_SOURCE_INTERNAL_RO • SMPS_INDUCTOR=SMPS_INDUCTOR_NONE DS13053 - Rev 7 page 5/31 BlueNRG-M2 Software structure 3.2 Software structure There are two possible software architectures: 1. Host-less mode (application processor): customer application runs on the BlueNRG-M2 module. Many sample projects are available in the development kit Figure 2. BlueNRG-M2 - BLE application processor 1. Hosted mode (network processor): the module is configured as network module controlled by an external host connected via SPI or UART. A project named DTM is available in the development kit that configures the BlueNRG-M2 module as a network module. Figure 3. BlueNRG-M2 as BLE network processor DS13053 - Rev 7 page 6/31 BlueNRG-M2 General characteristics 4 General characteristics 4.1 Absolute maximum ratings Table 1. Absolute maximum ratings Ratings Min. Typ. Max. Unit Storage temperature range -40 - +85 °C Supply voltage, VIN -0.3 - 3.9 V I/O pin voltage (VIO five-volt tolerant pin) -0.3 - 3.9 V - 8 - dBm RF saturation input power VESD-HBM electrostatic discharge voltage 4.2 ±2.0 kV Operating conditions Table 2. Operating conditions Ratings Min. Typ. Max. Unit Storage temperature range -40 - +85 °C Operating ambient temperature range -40 - +85 °C Supply voltage, VIN 1.7 3.3 3.6 V Signals and I/O pin voltage (according supply voltage) 1.7 - 3.6 V 2402 - 2480 MHz Frequency range DS13053 - Rev 7 page 7/31 BlueNRG-M2 Electrical specifications 5 Electrical specifications 5.1 Electrical characteristics Characteristic measured over recommended operating conditions unless otherwise specified. Typical values are referred to VIN= 3.3 V, 25 °C, SMPS on, XO 32 kHz and 32 MHz. Table 3. Electrical characteristics for the BLUENRG-M2SA Symbol IDD Parameter Test conditions Supply current Min. Typ. Max. Unit Reset 5 nA Standby 0.5 uA Sleep mode: 32 kHz XO ON (24 kB retention RAM) 0.9 μA Active mode 1.89 mA RX 7.55 mA TX +8 dBm 14.78 mA TX +4 dBm 10.73 mA TX +2 dBm 9.27 mA TX -2 dBm 8.46 mA TX -5 dBm 7.89 mA TX -8 dBm 7.45 mA TX -11 dBm 7.17 mA TX -14 dBm 7.01 mA Characteristic measured over recommended operating conditions unless otherwise specified. Typical values are referred to VIN= 3.3 V, 25 °C, SMPS off, RO 32 kHz and 32 MHz. Table 4. Electrical characteristics for the BLUENRG-M2SP Symbol IDD DS13053 - Rev 7 Parameter Supply current Test conditions Min. Typ. Max. Unit Reset 5 nA Standby 0.5 uA Sleep mode: 32 kHz RO ON (24 kB retention RAM) 2.1 μA Active mode 2.75 mA RX 15 mA TX +8 dBm 33.9 mA TX +4 dBm 22.6 mA TX +2 dBm 19.1 mA TX -2 dBm 16.9 mA TX -5 dBm 15.6 mA TX -8 dBm 14.7 mA TX -11 dBm 14.1 mA page 8/31 BlueNRG-M2 Digital I/O specifications 5.2 Symbol Parameter Test conditions IDD Supply current TX -14 dBm Min. Typ. 13.7 Max. Unit mA Digital I/O specifications IO pins are directly connected to the embedded state of the art BlueNRG-2 chipset. For more details about the digital I/O specifications, please refer directly to the BlueNRG-2 datasheet available on www.st.com. DS13053 - Rev 7 page 9/31 BlueNRG-M2 RF general characteristics 5.3 RF general characteristics Characteristic measured over recommended operating conditions unless otherwise specified. Typical value are referred to VIN= 3.3 V, 25 °C, DC/DC on, XO 32 kHz (BLUENRG-M2SA only) and XO 32 MHz. Table 5. RF general characteristics Symbol Parameter FREQ Test conditions Min. Typ. Max. Unit Frequency range 2400 - 2483.5 MHz FCH Channel spacing - 2 - MHz RFch RF channel center frequency 2402 - 2480 MHz Typ. Max. Unit Table 6. BLUENRG-M2SA RF characteristics Symbol Parameter Test conditions Min. RPMAX(1) Output power(2) Radiated +5 dBm RXSENS Sensitivity(2) Conducted -85 dBm 1. PA-Level set to 0x07 and En-High_Power set to 0x01 (corresponding to +8 dBm in conducted mode). 2. Radiated power may be impacted by application board / housing / etc. Table 7. BLUENRG-M2SP RF characteristics Symbol Parameter RPMAX(1) Radiated output RXSENS Sensitivity(2) power(2) Test conditions Min. Typ. Max. Unit Radiated +7 dBm Conducted -85 dBm 1. PA-Level set to 0x07 and En-High_Power set to 0x01 (corresponding to +8dBm in conducted mode). 2. Radiated power may be impacted by application board / housing / etc. DS13053 - Rev 7 page 10/31 BlueNRG-M2 Pin assignment 5.4 Pin assignment Figure 4. Pin connection for the BLUENRG-M2SA Figure 5. Pin connection for the BLUENRG-M2SP DS13053 - Rev 7 page 11/31 BlueNRG-M2 Pin assignment Table 8. Pin connection Function Pin # Name 1 ADC2 ADC input 2 2 ADC1 ADC input 1 3 DIO4 GPIO4 UART_RXD I2C2_CLK PWM0 4 DIO5 GPIO5 UART_TXD I2C2_DAT PWM1 5 VIN 6 ANATEST0/DIO14 GPIO14 I2C1_CLK SPI_CLK ADC_DAT 7 DIO7/BOOT (1) GPIO7 UART_CTS I2C2_DAT PDM_CLK 8 GND Mode “000” Mode “001” Mode “100” Mode “010” Power Supply Ground 9 DIO6 GPIO6 UART_RTS I2C2_CLK PDM_DAT 10 DIO8 GPIO8 UART_TXD SPI_CLK PDM_DAT 11 DIO11 GPIO11 UART-RXD SPI_CS1 12 DIO9 GPIO9 SWCLK SPI_IN(2) 13 DIO10 GPIO10 SWDIO SPI_out(3) 14 ANATEST1 15 DIO0 GPIO0 UART_CTS SPI_CLK 16 DIO2 GPIO2 PWM0 SPI_OUT PDM_CLK 17 DIO3 GPIO3 PWM1 SPI_IN ADC_CLK 18 DIO1 GPIO1 UART_RTS SPI_CS1 PDM_DAT 19 RESETN Anatest1 Reset (4) 20 DIO12 21(5) GND Ground or leave unconnected 22(5) N.C. Leave unconnected 23(5) N.C. Leave unconnected GPIO12 I2C1_CLK 1. The pin DIO7/BOOT is monitored by bootloader after power-up or hardware reset and it should be low to prevent unwanted bootloader activation. 2. The function SPI_IN indicates that the pin is always an input when configured for SPI. Thus in case of SPI master role, it acts as MISO pin. In case of SPI slave role, this pin act as MOSI 3. The function SPI_OUT indicates that the pin is always an output when configured for SPI. Thus in case of SPI master role, it acts as MOSI pin. In case of SPI slave role, this pin act as MISO. 4. DI012 can only be general purpose input pins (not output), or I2C1 clock pin. 5. BLUENRG-M2SA only. DS13053 - Rev 7 page 12/31 BlueNRG-M2 Hardware design 6 Hardware design Note: • • • • 6.1 All unused pins should be left floating; do not ground All GND pins must be well grounded The area around the module should be free of any ground planes, power planes, trace routings, or metal for 6 mm from the module antenna position, in all directions. Traces should not be routed underneath the module Reset circuitry The BlueNRG-M2 module requires an external reset circuitry to ensure proper operation at power-on. Refer to the "Reset management" section of the BlueNRG-2 datasheet for details. Figure 6. Reset circuitry If reset pin is controlled by an external host, RC circuit on the RESETn line is not required. 6.2 Debug interface The BlueNRG-M2 embeds the ARM serial wire debug (SWD) port. It is two pin (clock and single bi-directional data) debug interface, providing all the debug functionality plus real time access to system memory without halting the processor or requiring any target resident code Table 9. Debug interface Pin functionality Module PIN Pin description SWCLK 12 SWD clock signal SWDIO 13 SWD data signal For more information refer to the BlueNRG-2 technical documentation (https://www.st.com). DS13053 - Rev 7 page 13/31 BlueNRG-M2 Reflow soldering 6.3 Reflow soldering The BlueNRG-M2 is a high temperature strength surface mount Bluetooth® module supplied on a 23-pin (BLUENRG-M2SA) or 20 pin (BLUENRG-M2SP), 4-layer PCB. The final assembly recommended reflow profiles are indicated here below. Soldering phase has to be executed with care: in order to avoid undesired melting phenomenon, particular attention has to be taken on the set up of the peak temperature. Here are some suggestions for the temperature profile based on the following recommendations. Table 10. Soldering profile Profile feature PB-free assembly Average ramp up rate (TSMAX to Tp) 3°C/ s max. Preheat temperature min (TS min.) temperature max (TS max.) time (tS min to tS max.) (tS) 150 °C 200 °C 60-100 s Time maintained above Temperature TL Time tL 217 °C 60-70 s Peak temperature (TP) 240 +0 °C Time within 5 °C of peak temperature (TP -5°) 10-20 s Ramp down rate 6 °C/s Time from 25 °C to peak temperature 8 minutes max. Figure 7. Soldering profiles DS13053 - Rev 7 page 14/31 BlueNRG-M2 Regulatory compliance 7 Regulatory compliance 7.1 FCC certification This module has been tested and found to comply with the FCC part 15 rules. These limits are designed to provide reasonable protection against harmful interference in approved installations. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference may not occur in a particular installation. This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: this device may not cause harmful interference 1. 2. this device must accept any interference received, including interference that may cause undesired operation Modifications or changes to this equipment not expressly approved by STMicroelectronics may render void the user's authority to operate this equipment. Modular approval FCC ID: S9NBNRGM2SA & S9NBNRGM2SP In accordance with FCC part 15, the BLUENRG-M2SA and BLUENRG-M2SP is listed as a modular transmitter device. This module is evaluated for stand-alone use only. Finished products incorporating multiple transmitters must comply with collocation and RF exposure requirements in accordance with FCC multi-transmitter product procedures. Collocated transmitters operating in portable RF Exposure conditions (e.g.