BLE Mesh Module
The PT825XXBTV1 integrates a power-balanced 32-bit MCU, BLE/2.4GHz Radio, 48kB SRAM, 512kB internal
Flash, 14bit ADC, 6-channel PWM (1-channel IR/IR FIFO/IR DMA FIFO) and flexible GPIO interfaces.
-
Embedded low-power 32-bit MCU, which can also function as an application processor.
- Clock rate: 48 MHz
- Operating voltage: 1.8 V to 3.6 V (Under 1.8 V to 2.7 V, the module can start but the RF performance is
not guaranteed. Under 2.8 V to 3.6 V, the module performance is normal.) - Peripherals: Six pulse width modulation (PWM) interfaces.
- Bluetooth RF features
– Bluetooth LE 5.0
– Up to 2 Mbit/s RF data rate
– TX power: +10 dBm
– RX sensitivity: – 94.5 dBm at 1 Mbit/s - Embedded advanced encryption standard (AES) hardware encryption
- Onboard PCB antenna with 2.5 dBi gain
• Operating temperature: – 40°C to +125°C
Applications
- Smart LED lights
- Smart households
- Smart low-power sensors
Pin definition
The following table shows definitions of pins:
| Pin No. | Symbols | I/O type | Function |
|---|---|---|---|
| 1 | PC4 | I/O | I/O used for PWM Output, PWM2/P0N, 14-bit ADC |
| 2 | PC3 | I/O | I/O pin programmed to drive Warm White LED as PWM Output |
| 3 | PC2 | I/O | I/O pin programmed to drive White LED as PWM Output |
| 4 | PC1 | I/O | I/O used for PWM Output, PWM1/I2C_SCK |
| 5 | PC0 | I/O | I/O used for PWM Output, PWM4/I2C_SDA |
| 6 | GND | P | Power Supply Reference to Ground Pin |
| 7 | VDD | P | Power Supply Pin (3.3V) |
| 8 | PB7 | I/O | Serial Interface receiving pin (UART RX), SPI_DO, 14-bit ADC |
| 9 | PB6 | I/O | SPI_DI, 14-bit ADC |
| 10 | PB5 | I/O | I/O used for PWM Output, PWM5 |
| 11 | PB4 | I/O | I/O used for PWM Output, PWM4 |
| 12 | PD2 | I/O | I/O pin programmed to drive Red LED as PWM Output |
| 13 | PD3 | I/O | I/O used for PWM Output, PWM1N |
| 14 | PD4 | I/O | I/O pin programmed to drive Green LED as PWM Output |
| 15 | PD7 | I/O | SPI_CK, Serial Interface receiving pin (UART TX) |
| 16 | PA0 | I/O | I/O used for PWM Output, PWM0N |
| 17 | PA1 | I/O | GPIO |
| 18 | SWS | I | Single Wire Slave used for Programming |
| 19 | PB1 | I/O | I/O pin programmed to drive Blue LED as PWM Output |
Note: 1. P signifies a power supply pin, I/O represents an input/output pin, and AI denotes an analog input pin. 2. If you have any particular needs for controlling light colors via PWM outputs, please contact the business personnel at Plexilent.
Electrical parameters
Absolute electrical parameters
| Parameter | Description | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Ts | Storage temperature | -65 | 150 | °C |
| VCC | Power supply voltage | -0.3 | 3.9 | V |
| ESD voltage (human body model) | TAMB-25°C | - | 2 | KV |
| ESD voltage (human body model) | TAMB-25°C | - | 0.5 | KV |
Electrical conditions
| Parameter | Description | Minimum Value | Typical value | Maximum Value | Unit |
|---|---|---|---|---|---|
| Ts | Working temperature | -40 | - | 85 | °C |
| VCC | Working voltage | 2.8 | 3.3 | 3.6 | V |
| VIL | I/O low-level input | VSS | - | VCC*0.3 | V |
| VIH | I/O low-level input | VCC*0.7 | - | VCC | V |
| VOL | I/O low-level input | VSS | - | VCC*0.1 | V |
| VOH | I/O high-level output | VCC*0.9 | - | VCC | V |
RF features
Basic RF features
| Parameter | Description |
|---|---|
| Frequency band | 2.4GHz ISM band |
| Wireless standard | Bluetooth LE 4.2/5.0 |
| Data transmission rate | 1 Mbps, 2 Mbps |
| Antenna type | Onboard PCB antenna |
RF output power
| Parameter | Minimum Value | Typical value | Maximum Value | Unit |
|---|---|---|---|---|
| Average RF output power | -22 | 10 | 10.5 | dBm |
| 20 dB modulation signal bandwidth (1 Mbit/s) | - | 2500 | - | KHz |
| 20 dB modulation signal bandwidth (2 Mbit/s) | - | 1400 | - | KHz |
RF features
RF RX sensitivity
| Parameter | Minimum Value | Typical value | Maximum Value | Unit |
|---|---|---|---|---|
| RX sensitivity 1Mbps | - | -94.5 | - | dBm |
| RX sensitivity 2Mbps | - | -91 | - | dBm |
| Frequency offset 1Mbps | -250 | - | +300 | KHz |
| Frequency offset 2Mbps | -300 | - | +200 | KHz |
| Co-channel interference suppression | - | -10 | - | dB |
Antenna
Antenna type
PT825XXBTV1 uses an onboard PCB antenna with a gain of 2.5 dBi
Antenna interference reduction
For optimal RF performance, it is advisable to keep the antenna at a minimum distance of 15 mm from other metal components. Presence of metal objects in close proximity to the antenna may significantly diminish wireless signal strength, ultimately impacting the RF performance. Therefore, when creating a final product, sufficient space must be allocated for the antenna.
IMPORTANT NOTICE
- Based on security issues, please ensure that the positive pole of the power in the product don’t contact with the machine of metal material directly, or use the insulating materials for isolation, avoid short circuit and dangerous in the assembly of the product.
- Avoid twisting, bending, strong collision and falling damage in the assembly of this product. Please take care about ES
ANNEXURE
Contents covered in this article may be updated without notifying customers, all mentioned trademarks are registered by Plexilent, all above belong to Lumens Technologies Pvt. Ltd. Any unauthorized use is prohibited.
