Npe GEM3 Kurzanleitung zur Einrichtung

GEM3 Dual Band Bluetooth and ANT+ Module

Hardware Integration Guide

Version 0.1

January 9, 20

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

Revision History

Version

Revision Date

Change History

0.1

07/27/2019

Initial Draft

GEM3 Module Hardware Integration Guide Version 0.1 
North Pole Engineering 
221 N 1st St, Minneapolis, MN 55401 
www.npe-inc.com 
612.305.0440 
 
CONTENTS 
1OVERVIEW AND KEY FEATURES .....................................................................................................4 
1.1 FEATURES..............................................................................................................................................4 
2SPECIFICATION ....................................................................................................................................5 
2.1 SPECIFICATION SUMMARY .................................................................................................................... 5 
3HARDWARE SPECIFICATIONS..........................................................................................................7 
3.1 BLOCK DIAGRAMS AND PINOUT ...........................................................................................................7 
3.2 PIN DEFINITIONS .................................................................................................................................. 8 
3.3 ELECTRICAL SPECIFICATIONS .............................................................................................................10 
3.3.1 ABSOLUTE MAXIMUM RATINGS................................................................................................................................. 10 
3.3.2 RECOMMENDED OPERATING PARAMETERS .......................................................................................................... 10 
4DESIGN CONSIDERATIONS..............................................................................................................10 
4.1 HARDWARE.........................................................................................................................................10 
4.1.1 VDD_NRF....................................................................................................................................................................... 10 
4.1.2 UPDATING MODULE FIRMWARE............................................................................................................................... 10 
4.1.3 UART HOST................................................................................................................................................................... 11 
4.1.4 USB.................................................................................................................................................................................. 11 
4.1.5 NFC.................................................................................................................................................................................. 12 
4.1.6 RESET............................................................................................................................................................................... 12 
5MODULE LAYOUT CONSIDERATIONS...........................................................................................13 
6MECHANICAL INFORMATION.........................................................................................................15 
7SOLDERING GUIDELINES.................................................................................................................15 
8REGULATORY & STANDARDS INFORMATION ...........................................................................15 
8.1 FCC &INDUSTRY CANADA..................................................................................................................15 
8.1.1 FEDERAL COMMUNICATION COMMISSION (FCC) RADIATION EXPOSURE STATEMENT:........................ 15 
8.1.2 FCC/IC LABELING REQUIREMENTS........................................................................................................................ 15 
8.1.3 FCC WARNING:............................................................................................................................................................. 16 
8.1.4 INDUSTRY CANADA (IC) WARNING: ....................................................................................................................... 16 
8.2 CE........................................................................................................................................................17 
8.3 BLUETOOTH QUALIFICATION .............................................................................................................19 
9ORDERING DETAILS .........................................................................................................................19 
10 FURTHER ASSISTANCE ..................................................................................................................19 
 
 

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

1OVERVIEW AND KEY FEATURES

The GEM3 module has been designed to allow OEMs to easily add Bluetooth and ANT+ wireless

connectivity in their product offering. The GEM3 module incorporates North Pole Engineering

software specifically designed to enable fitness machines such as treadmills, exercise bikes,

ellipticals, rowers, stair climbers and step machines, etc. to wirelessly communicate exercise

data with smart phones or tablets as well as leaderboard software systems. For applications

other than fitness machines, developer’s can use Nordic Semiconductor’s SDK to create their

own embedded application specific software.

The GEM3 module is based on Nordic Semicondutor’s nRF52840 multiprotocol Bluetooth and

ANT+ chipset with 1 MB of flash and 256kB of RAM. The GEM3 module offers a variety of

peripheral interfaces including USB, NFC, UART, SPI, I2C, ADC, and GPIO, has a maximum

transmit power of +8dBm, and a sensitivity of -103dBm. This manual is intended to assist

hardware integration of the GEM3 module into a given design. Details on North Pole Engineering

GEMSAFE and GEMHCI software can be found http://npe-inc.com For applications using Nordic

Semiconductor SDK, please refer to Nordic Semiconductor’s SDK available at

developer.nordicsemi.com.

1.1 FEATURES

•-103 dBm sensitivity

•TX Power-20 to +8dBm in 4dB steps

•600m line of sight range @ +8dBm ,125Kbps(coded) phy

•4.8 mA peak TX @ 0dB

•4.6 mA peak RX

•1dB dB RSSI resolution

•ARM® CortexTMM4 32 bit processor running at 64MHz

•1 MB embedded flash memory and 256 kB RAM

•Onboard NFC for Out of Band pairing

•Peripheral Interfaces: USB, QSPI, PPI, ADC, GPIO, SPI, I2C, UART, I2S, PWM, QDEC, Low

power comparator, Temperature sensor.

•AES HW encryption

•FCC, CE, IC, China, South Korea, and Japan certified

•Integrated Antenna

•RoHS compliant

•Bluetooth End Product Listed

•Integrated Fitness Equipment Firmware and mobile application

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

2SPECIFICATION

2.1 SPECIFICATION SUMMARY

Category

Feature

Implementation

Bluetooth

ANT+

Frequency

Maximum Transmit Power

Minimum Transmit Power

Receive Sensitivity

4.2 Single Mode Peripheral

Broadcast

2.402-2.480 GHz

+8dBm

-20dBm

-103dBm

RF Range

0 dBm, 1M Phy, 1.82m ht.

0 dBm, Coded Phy, 1.82m ht.

+8 dBm, 1M Phy, 1.82m ht.

+8 dBm, Coded Phy, 1.82m ht.

Up to 240m line of sight

Up to 320m line of sight

Up to 360m line of sight

Up to 600m line of sight

Peripherals

UART Host Interface

GPIO

TX, RX 115.2kbps 8,N,1

Link Indicator

Pairing Button

FW Upgrade

North Pole Engineering Firmware

Over the air

Via JTAG interface

Control Protocol

GEMSAFE or GEMHCI

CSAFE Command Interface

or GEM HCI binary

command interface

Supply Voltage

Min

Max

Recommended

1.7V

5.5V

3.3V

Power Consumption

Radio transmitting @+8dBm

15mA @ 3.3v

Radio transmitting @ 0dBm

6.2mA # 3.3v

Physical

13.0 mm x 21.0 mm

Environmental

-40 to +85C

Approvals

FCC, IC, CE, China, South

Korea, Japan, and Bluetooth

EPL

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

3.2 PIN DEFINITIONS

Number

Pin Name

Function

Comment

GND

Connect to GND Plane

P0.03/AIN1

Host configurable I/O

Low Speed GPIO

P0.28/AIN4

Host configurable I/O

Low Speed GPIO

P0.29/AIN5

Host configurable I/O

Low Speed GPIO

P0.02/AIN0

Host configurable I/O

Low Speed GPIO

P0.31/AIN7

Host configurable I/O

Low Speed GPIO

P0.30/AIN6

Host configurable I/O

Low Speed GPIO

P0.05/AIN3

Host configurable I/O

P0.27

Host configurable I/O

P0.07/TRC_CLK

Host configurable I/O

P0.26

Host configurable I/O

P0.04/AIN2

Host configurable I/O

P0.06

Host configurable I/O

GND

Connect to GND Plane

P0.08

Host configurable I/O

P0.11/TRC_D2

Host configurable I/O

P0.12/TRC_D1

Host configurable I/O

P0.00/XL1

32.768 kHz Crystal

P0.01/XL2

32.768 kHz Crystal

P0.16

UART Module TX

See Section 4.1.3 Host

Interface

P0.14

UART Module RX

See Section 4.1.3 Host

Interface

VDD_HV

Module Power High

Voltage Mode / Low

voltage detect

D+

USB DATA POS

See Section 4.1.4 USB Interface

D-

USB DATA NEG

See Section 4.1.4 USB Interface

VBUS

USB VBUS

See Section 4.1.4 USB Interface

VDD_nRF

Module Power Normal

Mode / Voltage output

HV Mode

See Section 4.1.1 VDD_nRF

GND

Connect to GND Plane

P0.18/RESET/QCSN

Host configurable I/O

P0.19_QSCK

Host configurable I/O

P0.20

Host configurable I/O

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

P0.21/QSPI

Host configurable I/O

P0.23/QSPI

Host configurable I/O

P0.25

Host configurable I/O

P0.24

Host configurable I/O

P0.22/QSPI

Host configurable I/O

SWDIO

SWD Programmer I/O

See Section 4.1.2 Updating

Module Firmware

SWDCLK

SWD Programmer Clock

See Section 4.1.2 Updating

Module Firmware

P0.09/NFC1

NFC antenna input 1

See Section 4.1.5 NFC

P0.10/NFC2

NFC antenna input 2

See Section 4.1.5 NFC

GND

Connect to GND Plane

P1.06

Host configurable I/O

Low Speed GPIO

P1.04

Host configurable I/O

Low Speed GPIO

P1.07

Host configurable I/O

Low Speed GPIO

P1.05

Host configurable I/O

Low Speed GPIO

P1.00/TRC_D0

Host configurable I/O

P1.02

Host configurable I/O

Low Speed GPIO

P1.01

Host configurable I/O

Low Speed GPIO

GND

Connect to GND Plane

P0.13

Host configurable I/O

P0.15

Host configurable I/O

P0.17

Host configurable I/O

P1.03

Host configurable I/O

Low Speed GPIO

P1.09/TRC_D3

Host configurable I/O

P1.08

Host configurable I/O

P1.15

Host configurable I/O

Low Speed GPIO

P1.14

Host configurable I/O

Low Speed GPIO

P1.13

Host configurable I/O

Low Speed GPIO

P1.12

Host configurable I/O

Low Speed GPIO

P1.10

Host configurable I/O

Low Speed GPIO

P1.11

Host configurable I/O

Low Speed GPIO

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

3.3 ELECTRICAL SPECIFICATIONS

3.3.1 Absolute Maximum ratings

Parameter

Min

Max

VDD_nRF

-0.3V

+3.9V

VDD_HV

-0.3V

+5.8V

VBUS

-0.3V

+5.8V

VIO, VDD_nRF <= 3.6V

-0.3V

VDD+0.3V

VIO, VDD_nRF > 3.6V

-0.3V

3.9V

Storage Temperature

-40C

+85C

3.3.2 Recommended Operating Parameters

Parameter

Min

Typical

Max

VDD_nRF

1.7V

3.0V

3.6V

VDD_nRF maximum ripple

10mV

VDD_nRF Rise time

60ms

Operating Temperature

-40C

+85C

4DESIGN CONSIDERATIONS

The GEM3 module has been designed for easy integration into OEM applications requiring

minimal additional componentry. The following section provides suggestions to ensure

successful integration of the GEM3 module.

4.1 HARDWARE

4.1.1 VDD_nRF

Ensure the power source operating range and noise is within the specified limits for the GEM3

module and filter capacitors are incorporated as needed. The GEM3 module includes decoupling

capacitors for circuits within the module. External circuits sharing the same power source

should also be decoupled locally at connections to VDD_nRF and GND.

4.1.2 Updating Module Firmware

The GEM3 module firmware can be updated over the air using the North Pole Engineering utility

application. The North Pole Engineering utility application can be downloaded here:

www.xxxx.yyy.com

The GEM3 module firmware can also be updated through the Serial Wire Debug interface. The

following circuit example provides a reference for developers wanting an alternative to

programming the GEM3 module over the air:

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

Serial Wire Debug Interface

4.1.3 UART Host

The UART is required for communicating between the GEM3 module and fitness machine

console using the GEMSAFE or HCI command protocol. Pins 20 and 21 of the GEM3 module have

been configured as the UART interface. Pin 20 is the GEM3 module TX line that connects to the

Host RX line. Pin 21 is the GEM3 module RX line that connects to the Host TX line.

UART Host

4.1.4 USB

Integrated (on-module) USB transceiver (PHY). The USB device (USBD) controller implements a

full speed USB device function that meets 2.0 revision of the USB specification.

GEM3 Module Hardware Integration Guide Version 0.1

North Pole Engineering

221 N 1st St, Minneapolis, MN 55401

www.npe-inc.com

612.305.0440

USB

4.1.5 NFC

The GEM3 contains a 13.56 MHz AM receiver and a 13.56 MHz load modulator compatible with

the NFC-A listen mode operation defined in the NFC Forum with 106 kbps data rate. The

GEM3’s NFC-A support allows for Out-of-Band (OOB) pairing simplifying pairing between two

Bluetooth devices by exchanging authentication information over an NFC link.

NFC

4.1.6 Reset

The GEM3 module can be reset by holding PIN 25 low for 0.5us. The following is an example

reset circuit:

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