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38 Chapter 7. Product specification
Item Description
MCU DA14680, 0 Hz up to 96 MHz 32-bit ARM Cortex-M0
Memory 8Mb Flash, 64kB OTP, 128kB ROM, 144kB SRAM
Interfaces I
2
C, I
2
S, PCM, SPI, UART, USB, GPIOs
Wireless Bluetooth 4.1 and LoRa
Battery 2.0mm pitch connector
Size 32 x 148 x 32mm (including Hat)
Table 7.1: Key hardware specifications
.
7.2.1 RF performance
There are two RF systems in the module, which include Lora, and Bluetooth. In this section we
briefly introduce the performance of these systems. For Lora, both the "transmission" and "receive"
performance are listed in Table 7.2 and "Bluetooth" can be found in Table 7.3.
Item Value
TX Max +18.5dBm
RX down to -148dBm
Table 7.2: Lora RF performance
For Bluetooth is listed in Table 7.3.
Item Value
Output Power 0dBm
Sensitivity -94dBm
Table 7.3: Bluetooth performance.
7.2.2 Electrical characteristics
Symbol Description Min Max Unit
V
BAT T
Battery voltage 2.7 4.2 V
V
SNR
Voltage output on the USB-C A8 and B8 pins V
BAT T
3.3 V
I
V
SNR
Current output of 3V3_SNR 0 300mA mA
V
GPIO
Voltage on any GPIO pin on USB-C 0 V
SNR
V
V
BU S
USB charging voltage 4.2 5.75 V
I
BU S
USB charging current supply 300 mA
T
op
Operating Temperature -40 +85
◦
C
Table 7.4: Operating Range.