Nordic nRF52840 User manual

Bluetooth Module’s Manual
1. Introduction
Thank you for using the Bluetooth module product provided. Thisproduct is
Bluetooth 5.0 products,including embeddedUART interface optimized for low-power
applications
Before use, please read thisuser manual carefully. Pleasefollowthe technical
specifications when using the module in your design and develop activity. Timex
Group USA Inc. has the right to change the contents of thismanual in accordance
with the needs of the technical development.
2. Hardware Architecture
a. Main Chipset Information
Item
Vendor
Part Number
Bluetooth5.0
mac/baseband/radio
NORDIC
NRF52840
3. OperationalDescription
It is mounted in the watch communication controller forusing 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 methodand the reference frequency is
external32MHz crystal.
b. Synthesizer
Transceiver size isrelatively fresh inside the internalvoltage controlled oscillator
(VCO) and the PLL systemto respond to a wide adjustment range.
c. Transmission
Baseband processingGFSKmodulation,Data transfer speed is 1Mbps.
By the DAC in the BBP IC TXIQ signalis input through the modulation processand
a TX carrier frequency
The amplifier stage shelter willbe sent.

d. Reception
This transceiver IC is isolated to prevent unwanted noisy radiationby internal
amplifier noise LOW month And the RF signalis through the intermediate frequency
conversion and demodulation,and a RXIQ signal via a low-pass filter The input to
baseband Processing.
e. Product Spec.

4. Detailedspecification
Transmission frequency: 2402~2480 MHz
Number of channels: 40 channels
Operating Voltage: DC 3.7 V
Size: 30 mm X 35 mm X 0.8 mm
Temperature, humidity range:-20 ℃~+70 ℃
Communication system: repeated Shin way
Modulation: GFSK

5. Instructionto OEM
This device complies with part 15 of the FCCRules. Operation issubject to the
condition that this device does not cause harmfulinterference.
This device is verified to comply with part 15 of the FCC Rules for use with cable
television service.
This device complies with part 15 of the FCCRules. Operation issubject to the
following two conditions:
(1) This device may not cause interference and
(2) This device must accept any interference,includinginterference that may cause
undesired operation of the device.
Please note that changes or modifications not expressly approvedby the party
responsible for compliance could void the user’s authority to operate the equipment.
NOTE: Thisequipment hasbeen tested andfound to complywith the limits for a
Class B digitaldevice, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmfulinterferencein a
residential installation. This equipment generates, uses and can radiateradio
frequencyenergy and, if not installed andused in accordance with the instructions,
may cause harmfulinterference to radiocommunications.
However, there isno guarantee that interference willnot occur in a particular
installation. If this equipment does cause harmful interference to radioor television
reception, which can be determined by turningthe equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
—Reorient or relocate thereceivingantenna.
—Increase the separationbetween the equipment and receiver.
—Connect the equipment into an outleton a circuit different fromthat to which the
receiver is connected.
—Consult the dealer or an experiencedradio/TVtechnician for help.
This application and its antennamust not be co-locatedor operation in conjunction
with any other antenna or transmitter.
Host labeling requirement: Contains transmittermodule FCC ID: EP9-TMXMO2Q

This device complies with Industry Canada’s license-exempt RSSs. Operation is
subject to the following two conditions:
(1) This device may not cause harmfulinterference and
(2) this device must accept any interference received, including interference that may
cause undesired operation.
Le présent appareil est conforme auxCNR d'Industrie Canada applicables aux
appareils radio exemptsde licence. L'exploitationest autorisée auxdeuxconditions
suivantes:
(1) l'appareilne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit acceptertout brouillageradioélectriquesubi, même si
le brouillage est susceptible d'encompromettre le fonctionnement.
Host labeling requirement: Contains transmittermodule ICID: 3348A-TMXMO2Q
6. Note：
a. The module is excluded fromSAR evaluation according to FCC KDBPublication
447498 D01 General RF Exposure Guidancev06 and clause 2.5.1 of RSS-102
Issue 5.
b. The module is a limited single module without shielding case, CIIPC or new
filing shallbe applied for anyhost equipment using thismodule, such as provide
the shielding case for this module.