Nordic NRF52840 Manual

Bluetooth Module's Manual

1. Introduction

Thank you for using the Bluetooth module product provided. This product is
Bluetooth 5.0 products, including embedded UART interface optimized for low-power
applications
Before use, please read this user manual carefully. Please follow the technical
specifications when using the module in your design and develop activity. Timex
Group USA Inc. has the right to change the contents of this manual in accordance
with the needs of the technical development.

2. Hardware Architecture

a. Main Chipset Information

Item Vendor Part Number
Bluetooth 5.0
NORDIC NRF52840
mac/baseband/radio

3. Operational Description

It is mounted in the watch communication controller for using a wireless device user
the Bluetooth devices that act.
Frequency Use the 2402MHz ~ 2480MHz band and channel interval is 2 MHz.
a. Time base of the RF frequency
ZERO IF intermediate frequency using the method and the reference frequency is
external 32MHz crystal.
b. Synthesizer
Transceiver size is relatively fresh inside the internal voltage controlled oscillator
(VCO) and the PLL system to respond to a wide adjustment range.
c. Transmission
Baseband processing GFSK modulation, Data transfer speed is 1Mbps.
By the DAC in the BBP IC TX IQ signal is input through the modulation process and
a TX carrier frequency
The amplifier stage shelter will be sent.