BLUENRG-M0A

BlueNRG-M0 Datasheet Very low power network processor module for Bluetooth® low energy v4.2 Features • • • • • • • Product status link BlueNRG-M0 Product label • • • Bluetooth v4.2 compliant Supports master and slave modes – – Multiple roles supported simultaneously Embedded Bluetooth low energy protocol stack – GAP, GATT, SM, L2CAP, LL, RFPHY Bluetooth low energy profiles provided separately Embedded ST BlueNRG-MS network processor – Up to +8 dBm available output power – Down to -88 dBm Rx sensitivity – Up to 96 dB link budget with excellent link reliability Host interface – SPI, IRQ, and RESET – On-field stack upgrading available via SPI AES security co-processor Certification – CE qualified – FCC, IC modular approval certified – TYPE qualified – BQE qualified – WPC certification (BlueNRG-M0L) On-board chip antenna Operating supply voltage: from 1.7 to 3.6 V Operating temperature range: -40 °C to 85 °C Applications • • • • • • • • • Watches Fitness, wellness and sports Consumer medical Security/proximity Remote control Home and industrial automation Assisted living Mobile phone peripherals PC peripherals Description The BlueNRG-M0 is an easy to use Bluetooth® low energy master/slave network processor module, compliant with Bluetooth v4.2. The BlueNRG-M0 module supports multiple roles simultaneously, and can act at the same time as Bluetooth low energy sensor and hub device. DS13023 - Rev 6 - October 2021 For further information contact your local STMicroelectronics sales office. www.st.com BlueNRG-M0 The entire Bluetooth low energy stack and protocols are embedded into BlueNRGM0 module. The external host application processor, where the application resides, is connected to the BlueNRG-M0 module through a standard SPI interface. The BlueNRG-M0 module provides a complete RF platform in a tiny form factor. Radio, antenna, high frequency and LPO oscillators are integrated to offer a certified solution to optimize the time-to-market of the final applications. The BlueNRG-M0 can be powered directly with a standard 3 V coin cell battery, a pair of AAA batteries or any power source from 1.7 to 3.6 V. DS13023 - Rev 6 page 2/27 BlueNRG-M0 General description 1 General description The BlueNRG-M0 is a single-mode Bluetooth low energy master/slave network processor module compliant with Bluetooth® v4.2. The BlueNRG-M0 module has been designed around the ST BlueNRG-MS network processor, on which a complete power-optimized stack for Bluetooth single mode protocol runs, providing Master, slave role support • • GAP: central, peripheral, observer or broadcaster roles • ATT/GATT: client and server • SM: privacy, authentication and authorization • L2CAP • Link Layer: AES-128 encryption and decryption The BlueNRG-MS radio embeds non-volatile Flash memory allows on-field stack upgrading. In addition, according to the Bluetooth specification v4.2, the BlueNRG-M0 module provides: • Multiple roles simultaneously support • Support simultaneous advertising and scanning • Support being slave of up to two masters simultaneously • Privacy V1.1 • Low duty cycle directed advertising • Connection parameters request procedure • LE Ping • 32 bits UUIDs • L2CAP connection oriented channels The BlueNRG-M0 module is equipped with Bluetooth low energy profiles in C source code, available for the ST radio BlueNRG-MS. The external host application processor, where the application resides, is interfaced with the BlueNRG-M0 module through an application controller interface protocol, which is based on a standard SPI interface. The BlueNRG-M0 module enables wireless connectivity into electronic devices, not requiring any RF experience or expertise for integration into the final product. The BlueNRG-M0 module provides a complete RF platform in a tiny form factor and being a certified solution optimizes the time-to-market of the final applications. The BlueNRG-M0 module allows applications to meet of 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-M0A). Instead, concerning the BLUENRG-M0L the best performance in terms of power consumption is achieved using a 1.8V DC power supply. The BlueNRG-M0 can be powered directly with a standard 3 V coin cell battery, a pair of AAA batteries or any power source from 1.7 to 3.6 V. ST may update the FW provided with the modules at any time. ST recommends that users regularly check for documentation and the current FW version available at www.st.com/bluemodules. DS13023 - Rev 6 page 3/27 BlueNRG-M0 Block diagram 2 Block diagram Figure 1. HW block diagram for the BlueNRG-M0 DS13023 - Rev 6 page 4/27 BlueNRG-M0 Software architecture 3 Software architecture 3.1 Bluetooth firmware implementation The BlueNRG-M0 modules have been designed to work with an external host processor. The external host application processor, where the application resides, is interfaced with the BlueNRG-MS inside the BlueNRG-M0 modules through an application controller interface (ACI) protocol, which is based on a standard SPI slave interface as transport layer, basing on five physical wires: • 2 control wires (Clock and “Chip Select") • 2 data wires with serial shift-out (MOSI and MISO) in full duplex • 1 wire to indicate data availability from the slave (IRQ) All the SPI pins have an internal pull-down except for the CS that has a pull-up. All the SPI pins, except the CS, are in high impedance state during the low-power states. The IRQ pin needs a pull-down external resistor. Figure 2. BlueNRG-M0 application block diagram DS13023 - Rev 6 page 5/27 BlueNRG-M0 General characteristics 4 General characteristics 4.1 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 1. 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 & I/O pin voltage (according supply voltage) 1.7 - 3.6 V 2402 - 2480 MHz Frequency range DS13023 - Rev 6 page 6/27 BlueNRG-M0 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 2. Electrical characteristics for the BLUENRG-M0A Symbol IDD Parameter Test conditions Supply current Min. Typ. Max. Unit Reset 5 nA Standby 1.8 uA Sleep mode: 32 kHz XO ON (12 KB retention RAM) 1.7 Sleep mode: 32 kHz XO ON (24 KB retention RAM) 2.2 Active mode 2.12 mA RX 9.36 mA TX +8 dBm 16.50 mA TX +4 dBm 12.04 mA TX +2 dBm 10.40 mA TX -2 dBm 9.44 mA TX -5 dBm 8.79 mA TX -8 dBm 8.29 mA TX -11 dBm 8.01 mA TX -14 dBm 7.82 mA μA Characteristic measured over recommended operating condition unless otherwise specified. Typical values are referred to VIN= 3.3 V, 25 °C, SMPS off, RO 32 kHz and 32 MHz. Table 3. Electrical characteristics for the BLUENRG-M0L Symbol IDD DS13023 - Rev 6 Parameter Supply current Test conditions Min. Typ. Max. Unit Reset 5 nA Standby 1.7 uA Sleep mode: 32 kHz RO ON (12 kB retention RAM) 2.8 Sleep mode: 32 kHz RO ON (24 kB retention RAM) 3.2 Active mode 2.54 mA RX 16.36 mA TX +8 dBm 27.35 mA TX +4 dBm 21.3 mA TX +2 dBm 18.29 mA TX -2 dBm 16.44 mA μA page 7/27 BlueNRG-M0 Digital I/O specifications Symbol IDD 5.2 Parameter Test conditions Supply current Min. Typ. Max. Unit TX -5 dBm 15.18 mA TX -8 dBm 14.19 mA TX -11 dBm 13.61 mA TX -14 dBm 13.25 mA Digital I/O specifications IO pins are directly connected to the embedded state of the art BlueNRG-MS chipset. For more details about the digital I/I specification, please refer directly to the BlueNRG-MS datasheet available on www.st.com. 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-M0A only) and XO 32 MHz. Table 4. 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 5. BLUENRG-M0A RF characteristics Symbol Parameter RPMAX(1) Output power(2) Sensitivity(2) RXSENS Test conditions Min. Radiated +6 dBm 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 6. BLUENRG-M0L RF characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit RPMAX(1) Radiated output power(2) Radiated +6 dBm RXSENS Sensitivity(2) 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. DS13023 - Rev 6 page 8/27 BlueNRG-M0 Pin assignment 5.4 Pin assignment Figure 3. Pin connection Table 7. Pin connection Name Type Pin # Description V max. tolerant SPI interface SPI_IRQ O 4 SPI IRQ (SLAVE has data for MASTER) Vin SPI_CLK I 7 SPI CLOCK (Max. 8 MHz) Vin SPI_MISO O 8 SPI MISO (MASTER in / SLAVE out) Vin SPI_MOSI I 9 SPI MOSI (MASTER out SLAVE in) Vin SPI_CS I 10 SPI “Chip select” (SPI slave select) Vin Power and ground Vin 5 Vin GND 6 GND (1.7 V - 3.6 V max.) Reset Reset input (active low < 0.35 Vin) BT_RESET I 11 EXT_LPCLK I 1 Not connected GPIO2 I/O 2 Not connected ANA TEST 0 I 3 Not connected (1.7 V - 3.6 V max.) LPO DS13023 - Rev 6 page 9/27 BlueNRG-M0 Hardware design 6 Hardware design The BlueNRG-M0 module supports SPI hardware interfaces. 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 Reflow soldering The BlueNRG-M0 is a high temperature strength surface mount Bluetooth® module supplied on a 11-pin, 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 8. Soldering profile Profile feature PB-free assembly Average ramp up rate (TSMAX to Tp) 3°C/ sec 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 4. Soldering profiles DS13023 - Rev 6 page 10/27 BlueNRG-M0 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 harmfulinterference 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: S9NBNRGM0AL In accordance with FCC part 15, the BlueNRG-M0 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.