SY021-PCB Datasheet
Overview
The Kallisto® SY021-PCB is a compact sensor module which can be used for application integration as standalone module or assembled on a mezzanine using the Bottom LGA pads. The platform module is delivered with a Zephyr based firmware which makes the system functions accessible over Bluetooth LE. With the mobile Toolbox App or Python library the module can be used instantly to configure sensors and stream sensor data. A gateway solution is available with partners. Additional functionality is integrated by request and can be purchased from Sensry. Please refer to service@sensry.de for additional information.
The module is able to acquire 20 sensors and control 4 actuators outputs to support a variety of applications. Additionally, there is an extension header to add additional sensors or periphery to board.
General Features
- LGA Module 55mm x 22mm
- Low power ARM Cortex-M4F microcontroller
- Bluetooth® 5.4 Low Energy
- Bluetooth® LE Antenna-on-Module
- Bottom LGA pads for external NFC antenna
- Bottom LGA pads for Qi charge receiver antenna
- Battery management & LiPo charger
- On-board 128 MByte Flash memory for sensor data logging
- USB connector for power supply
- 20 sensor values
- 4 high current low-side driver on LGA pads
Integrated Sensors
In its standard configuration, the Kallisto® sensor platform is equipped with a set of rigidly attached sensor components which facilitate the simultaneous detection of 20 different measurands at sampling rates which can be individually configured even after shipment. Optionally, additional sensor components can be connected to the SY021-PCB by making use of its multiple I/O interfaces. The integration in the firmware can be purchased from Sensry GmbH. This flexibility enables a customization according to customer requirements and application needs.
| Sensor | Value Range | Sampling Rate / Hz |
|---|---|---|
| Acceleration | ±4 g ... ±16 g for x-, y-, z-axis | 12.5 ... 800 |
| Angular velocity (Gyrsocope) | ±125 °/s ... ±2000 %/s for x-, y-, z-axis | 25 .. 800 |
| Magnetic Flux | ±50 gauss for x-, y-, z-axis | 10 ... 150 |
| High frequency vibration | ±8 g ...64 g for x-, y-, z-axis | 0.781 ... 25600 |
| Temperature | -40 ... +85 °C | 0.017 ... 1 |
| Relative Humidity | 0 ... 100 %rH | 0.017 ... 1 |
| Ambient Pressure | 300 ... 1100 hPa | 0.017 ... 1 |
| b-VOC (breath-VOC) | 0.5 ... 1000 ppm | 0.017 ... 1 |
| eCO2 (equivalent CO2) | 400 ppm ... infinity | 0.017 ... 1 |
| IAQ (Index Air Quality) | 0 ... 100 | 0.017 ... 1 |
| Light-to-digital | 1.2 ... 10 mW/cm² (for 300 ... 1000 nm wave length) | 0.1 ... 8 |
| Noise level | -135 dbFS ... +3 dBFS (Decibels relative to full scale) | 0.1 ... 1 |
Technical Data
Mechanical Parameters
| Parameter | Value |
|---|---|
| Board type | LGA with Top-side Assembly |
| Size (L x B x H) | 54 mm x 22 mm x 4 mm |
| Mounting holes | 3 x M2 |
| Battery connector | MOLEX 78171-0003 |
| Extension connector | MOLEX 504050-1091 |
| Antenna | on-board chip antenna |
| Power | USB-C or Wireless QI Charge (Coil needed) |
| Switch Button | Reset |
| LED | BLE connection |
LGA Pinout
The LGA Pinout is for made for mezzanine assembly and future extensions. The following image shows the top view, the LGA pads are on the bottom side of the PCB.
| LGA Pad | Description |
|---|---|
| EXT UART RX | Serial UART RX (same as extension connector) |
| EXT UART TX | Serial UART TX (same as extension connector) |
| EXT GPIO 2 | GPIO 2 (same as extension connector) |
| EXT GPIO 1 | GPIO 1 (same as extension connector) |
| PDM DATA | PDM DATA (same as extension connector) |
| PDM CLK | PDM CLK (same as extension connector) |
| I2C SCL | I²C Clock (same as extension connector) |
| I2C SDA | I²C Data (same as extension connector) |
| +1V8 | 1.8V Regulated Power |
| GND | Power Ground |
| RESERVED | Do not connect! |
| RESERVED | Do not connect! |
| RESERVED | Do not connect! |
| nRES | System Reset |
| SPI MOSI | SPI Master Out Slave In |
| SPI SCK | SPI Clock |
| SPI MISO | SPI Master In Slave Out |
| QI_COIL2 | Qi Charge Coil Connector 2 |
| QI_COIL1 | Qi Charge Coil Connector 1 |
| +1V8 | 1.8V Regulated Power |
| EXT0 | External Low Side Driver 1 |
| EXT1 | External Low Side Driver 2 |
| USB_P | USB Data + |
| USP_N | USB Data - |
| EXT2 | External Low Side Driver 3 |
| EXT3 | External Low Side Driver 4 |
| VSYS | System voltage (VUSB or VBAT) |
| +5V | 5V Board power |
| SHPHLD | Ship Mode Deactivation |
| GND | Power Ground |
| SHPACT | Ship Mode Activation |
| NFC1 | NFC coil connector 1 |
| NFC2 | NFC coil connector 2 |
| GND | Power Ground |
| ADC1 | ADC input 2 |
| ADC0 | ADC input 1 |
| VBAT | Battery voltage (+) |
| NTC | Battery NTC (10kOhm expected) |
| GND | Power Ground |
System Schematic
Electrical Parameters
The PCB module can be powered over USB-C, Qi Charger or LiPo-battery. The board system voltage to power the SoC and periphery is 1.8V.
Board Power & Battery Charge
Rechargeable LiPo-batteries can be purchased separately from Sensry. The standard capacities are 150 mAh, 500 mAh and 1900mAh, other capacities are available on request.
There are different possibilities to power the board:
- USB (w/ or w/o battery)
- LGA pads (+5V, VBAT or regulated 1.8V)
- LiPo battery (on battery connector or LGA pad)
To recharge the battery, the board must be powered either with 5V (USB or 5V LGA pad) or via Qi Charge Coil and a standard Qi charge transmitter.
For wireless charging, a receiver coil must be assembled to the LGA pins AC1 and AC2. The recommendation is a TDK WR222230-26M8-G coil:
Any standard Qi smartphone charger can be used to charge the module. The receiver coil must be place close (< 1 mm) to the Qi charger.
Battery Interface
The LiPo battery must include a 10kOhm NTC.
Extension Interface
The extension interface is equipped with the 10-pin Molex Pico-Lock-Connector 504050-1091 and allows to extend the sensor module with periphery. Molex provide several cable assemblies (MOLEX 15132100x) as a board-to-board connector. The Pinout is described in the following table.
| Pin | Function | Description |
|---|---|---|
| 1 | GND | System Ground |
| 2 | VSYS | System Power |
| 3 | I2C SDA | I²C Data |
| 4 | I2C SCL | I²C Clock |
| 5 | PDM CLK | Audio PDM Clock |
| 6 | PDM DATA | Audio PDM Data |
| 7 | GPIO 1 | GPIO for future use |
| 8 | GPIO 2 | GPIO for future use |
| 9 | UART TX | Serial UART TX |
| 10 | UART RX | Serial UART RX |
Ship Mode Activation / Deactivation
The ship mode allows to switch off / Shut-down the device completely while the battery is still connected. It isolates the battery and reduces the quiescent current. The ship mode is designed for transportation and long-term storage. Two LGA pads are available to trigger & control the mode externally.
The ship mode can be activated using the SHPACT LGA pin on the bottom side. While the battery is connected and the USB or Qi Power is disconnected (no battery charge), this pin must be tied to HIGH (> 1.1V) for minimum period of 200 ms. Alternatively, the SHPACT pin is connected to an internal Microcontroller pin, so the mode can be activated by firmware.
To deactivate t ship mode, there are two ways: Either connect the USB plug to apply 5V power source or tie SHPHLD LGA pin low (< 0.4 V) for a minimum period of 200 ms.
For further questions, development, and programming support, and for access to our dedicated Gitlab repository, please contact our support via support@sensry.de.