MicroRidge Systems RM2 2.4GHz Radio Module User Manual Micro RM24 Users Guide Ver 1 2 4

MicroRidge Systems, Inc. 2.4GHz Radio Module Micro RM24 Users Guide Ver 1 2 4

Users Manual

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Version: 1.2.4

Printed: Friday, October 31, 2014 at 10:02 AM in Sunriver, Oregon.

MicroRidge 2.4 GHz Radio Module

IContents

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Table of Contents

Chapter 1 1

...................................................................................................................................

Introduction

Chapter 2 3

...................................................................................................................................

Features

Chapter 3 4

...................................................................................................................................

Releated Documents

Chapter 4 5

...................................................................................................................................

Specifications

...................................................................................................................................

Atmel Documentation 5

...................................................................................................................................

Dimensions 7

...................................................................................................................................

Pin Configuration 10

...................................................................................................................................

Soldering 12

Chapter 5 13

...................................................................................................................................

Application Board Design

Chapter 6 15

...................................................................................................................................

Ordering Information

Chapter 7 16

...................................................................................................................................

Radio Certification

Chapter 8 18

...................................................................................................................................

Contact MicroRidge

Chapter 9 19

...................................................................................................................................

Revision History

Introduction 1

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

1Introduction

The MICRO-RM2.4 Radio Module from MicroRidge Systems is a small wireless module based

on the Atmel ATmega2564RFR2 microcontroller. The ATmega2564RFR2 is a low-powered

CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture combined with a high

data rate transceiver for the 2.4 GHz ISM (industrial, scientific and medical) band.

The MICRO-RM2.4 contains an on-board chip antenna. The module contains radio certifications

for FCC, IC and EU (CE). No additional RF testing is required as long as the application of the

MICRO-RM2.4 follows the approved certifications.

The small size of the MICRO-RM2.4 module allows it to be used in small and compact products.

The module measures 12 x 20.75 x 3 mm (.472 x .817 x .118 inches). The module requires a

power supply of 1.8 to 3.6 volts DC. This voltage range allows the module to be powered by a

single 3 volt coin cell or two 1.5 volt batteries.

Radio Module Images

The photos below show the top and bottom views of the radio module. The 2 large gold pads

shown in the bottom view are the ground pads discussed in the Dimensions section .

Isometric View Top View Bottom View

Introduction 2

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Basic Block Diagram

A basic block diagram of the MICRO-RM2.4 Radio Module is shown below. Refer to the Atmel

ATmega644/1284/2564RFR2 documentation for block diagrams with greater detail.

Features 3

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

2Features

The features of the MICRO-RM2.4 Radio Module are numerous and allow the module to be used

in many low powered short range applications. The primary features of this module are as

follows:

Ultra compact size: 12 x 20.75 x 3 mm (.472 x .817 x .118 inches)

Built-in 32.768 kHz crystal for low power and deep sleep modes

Built-in 16 MHz crystal for 2.4 GHz transceiver and AVR microcontroller

Power supply voltage of 1.8 to 3.6 VDC

Typical power consumption:

o0.75 A in sleep mode (transceiver in Sleep and AVR in Power Save/Down mode)

o14.5 ma in TX mode at 3.5 dBm

o12.5 ma in RX mode

Memory resources:

o256K bytes In-System Self-Programmable Flash

o8K bytes EEPROM

o32K bytes SRAM

IEEE® 802.15.4 compliant transceiver

2.4 GHz ISM band

TX/RX 128 byte frame buffer

TX output power from -17 dBm to 3.5 dBm

Receiver sensitivity = -100 dBm

14 RF Channels (11 to 25, channel 14 is reserved for internal use)

Serial bootloader

Interface connections:

o30 I/O ports

o2 RS-232 serial ports

oJTAG programming connection

oI2C

High performance low power AVR® 8-bit microcontroller

ROHS complainant

Extensive documentation and software resources available on the Atmel web site

Releated Documents 4

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

3Releated Documents

Additional information is available about the MICRO-RM2.4 Radio Module components and

supporting software from the following sources:

A complete description of the ATmega2564RFR2 microcontroller used in the module is

available on the Atmel web site (www.atmel.com). The document describing this

microcontroller is ATmega644/1284/2564RFR2 42073A-MCU Wireless.

Atmel also has additional documentation available that may be helpful in developing

wireless applications for the MICRO-RM2.4 module.

The MicroRidge Wireless Communication Library is available to assist in the development

of firmware for the MICRO-RM2.4 Radio Module. A per module license is required in order

to use this Communication Library. This library is only supported on the IAR Embedded

Workbench Ver 6.4 or later for the AVR microcontroller. Contact MicroRidge Systems for

more information.

Specifications 5

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

4Specifications

The specifications sections consists of 4 areas:

Atmel Documentation This section contains 3 of the tables from the Atmel

ATmega644/1284/2564RFR2 documentation. The complete Atmel

document is over 600 pages in length. In order to fully understand

the radio module and how to work with it, you must become

familiar with this Atmel document.

Dimensions The dimensions for the MICRO-RM2.4 Radio Module, pad

locations and bottom side ground pads are presented in this

section.

Pin Configuration The pin connections available on the MICRO-RM2.4 Radio

Module are listed in this section.

Soldering A soldering profile is shown in this section.

4.1 Atmel Documentation

For the complete specifications for the Atmel ATmega2564RFR2 radio transceiver refer to

ATmega644/1284/2564RFR2 documentation . The information shown below is only a few of

the multiple tables from the Atmel documentation. Refer to the Atmel documentation for the test

conditions and references shown in the tables.

General RF Specifications

Specifications 6

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Transmitter characteristics

Current Consumptions Specifications

Specifications 7

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

4.2 Dimensions

Board Dimensions

The dimensions for the MICRO-RM2.4 Radio Module are given below. All of the dimensions are

in mm. The thickness of the module from the bottom of the module to the top of the RF shield is

3 mm. The pad spacing is 1 mm and the pad width is 0.7 mm.

Board Dimensions (mm) and Solder Pad Placement

Specifications 8

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Solder Pad Placement

The recommended placement of the solder pads on the application board is shown below. The

2 large pads are ground pads and they are discussed in the Ground Pads. All dimensions are in

mm.

Specifications 9

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Ground Pads

The bottom of the module contains 2 ground (GND) pads areas that can be used to help secure

the module to the circuit board. In a rough environment, we have seen delamination problems

with this type of module board. When adhesive was used to help secure the module board to

the application circuit board, we no longer had any delamination problems between the module

and application circuit boards. In the stuffing process, the board house can use an adhesive to

help secure the wireless module to the application circuit board or solder the ground pads to the

application circuit board..

The 2 ground pads are available on the bottom side of the wireless module. These ground pads

are shown in red and labeled A and B. These 2 pad areas are part of the bottom ground plane.

Location of the Ground Pads on the Bottom of the Wireless Module

The size and location of the ground pads is shown in the following table.

Ground

Pad

Size Distance from Upper Left Corner

Width, mm Height, mm Horizontal, mm Vertical, mm

A3.25 2.50 6.50 5.50

B2.625 5.00 14.75 2.50

Specifications 10

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

4.3 Pin Configuration

The pin connections for the MICRO-RM2.4 Radio Module are show below. For a complete

description of each pin refer to the Atmel ATmega644/1284/2564RFR2 documentation.

MICRO-RM2.4 Pin Connections

Module

Name Description

1 GND Ground (connected to AVSS_RFP, AVSS_RFN, DVSS & AVSS)

2RESET Reset input (active low). The radio module also contains a 100K pullup

resistor connected between this pin and VCC.

3PG1 Port PG1

4PD5 Port PD5 (alternate function XCK1)

5PD4 Port PD4 (alternate function ICP1)

6PD1 Port PD1 (alternate functions SDA & INT1)

7PD0 Port PD0 (alternate functions SCL & INT0)

8VCC 1.8 to 3.6 VDC (connected to DEVDD & EVDD)

9PB5 Port PB5 (alternate functions OC1A & PCINT5)

10 PD2 Port PD2 (alternate functions RXD1 & INT2)

Specifications 11

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Module

Name Description

11 PD3 Port PD3 (alternate functions TXD1 & INT3)

12 PD6 Port PD6 (alternate function T1)

13 PB0 Port PB0 (alternate functions SSN & PCINT0)

14 VCC 1.8 to 3.6 VDC (connected to DEVDD & EVDD)

15 PB4 Port PB4 (alternate functions OC2A & PCINT4)

16 PB1 Port PB1 (alternate functions SCK & PCINT1)

17 PB2 Port PB2 (alternate functions MOSI, PDI & PCINT2)

18 PB3 Port PB3 (alternate functions MISO, PDO & PCINT3)

19 PB6 Port PB6 (alternate functionsOC1B & PCINT6)

20 PB7 Port PB7 (alternate functions OC0A, OC1C & PCINT7)

21 PE0 Port PE0 (alternate functions RXD0 & PCINT8)

22 PE1 Port PE1 (alternate function TXD0)

23 PE2 Port PE2 (alternate functions XCK0 & AIN0)

24 PE3 Port PE3 (alternate functions OC3A & AIN1)

25 PE4 Port PE4 (alternate functions OC3B & INT4)

26 PE5 Port PE5 (alternate functions OC3C & INT5)

27 PE7 Port PE7 (alternate functions ICP3, INT7 & CLK)

28 VCC 1.8 to 3.6 VDC (connected to DEVDD & EVDD)

29 PF2 Port PF2 (alternate function ADC2)

30 PF1 Port PF1 (alternate function ADC1)

31 PF0 Port PF0 (alternate function ADC0)

32 PF7 Port PF7 (alternate functions JTAG TDI & ADC7)

33 PF6 Port PF6 (alternate functions JTAG TDO & ADC6)

34 PF5 Port PF5 (alternate functions JTAG TMS & ADC5)

35 PF4 Port PF4 (alternate functions JTAG TCK, PF3 & ADC3)

36 GND Ground (connected to AVSS_RFP, AVSS_RFN, DVSS & AVSS)

-- PD7 Port PD7. Do not use. This ports is used internally by the wireless

module.

-- TST Connected to GND in the wireless module.

-- CLKI Connected to GND in the wireless module.

Specifications 12

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Module

Name Description

-- TOSC1 Connected to 32.768 KHz crystal in the wireless module.

-- TOSC2 Connected to 32.768 KHz crystal in the wireless module.

-- XTAL1 Connected to 16 MHz crystal in the wireless module.

-- XTAL2 Connected to 16 MHz crystal in the wireless module.

4.4 Soldering

The following J-STD-020C compliant soldering profile is recommended for the MICRO-RM2.4

Radio Module. Since the FCC and IC IDs are etched into the RF shield, there is no concern

about heat form the soldering process damaging a label that contains this ID information.

Profile Feature Values

Average ramp-up rate (217°C to peak) 3°C/s max

Preheat temperature 175°C ±25°C 180s max

Temperature maintained above 217°C 60s to 150s

Time within 5°C of actual peak temperature 20s to 40s

Peak temperature range 260°C

Ramp-down rate 6°C/s max

Time within 25°C to peak temperature 8 minutes

Application Board Design 13

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

5Application Board Design

Normally, chip antennas are more tolerant of the board and enclosure materials. However, the

recommendations for the radio module placement on the application PCB still apply. The radio

module should be placed along an edge of the application PCB as shown below.

Module placed along top

edge of PCB.

Module placed along top

edge of PCB.

Module placed in center

portion of PCB.

Not an acceptable design.

Mounting Information

In general, via holes and traces are should not be placed on the application PCB upper layer in

the area occupied by the radio module module. The exception to this is if you are soldering the

ground pads to the PCB board, you can use via holes and/or traces to connect the pads to the

ground. Be careful that you do not place any via holes or traces adjacent to non-ground

circuits.

The ground connections along the edges of the radio module should be grounded by via holes

located as close as possible to the ground connections on the radio module.

Via Placement

The board design should prevent propagation of microwave fields inside the board material.

Electromagnetic waves of high frequency may penetrate the board thus making the edges of the

board radiate, which may distort the antenna pattern. To eliminate this effect, via holes should be

placed around the board's edges. A common rule of thumb is to make the via spacing less than

λ/20 at the maximum operating frequency. For the MICRO-RM2.4 Radio Module, the wavelength

at 2.4 GHz is 125 mm and the maximum via spacing would be 6.25 mm.

Application Board Design 14

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Other Recommendations

Metal enclosure should not be used.

Low profile enclosures might affect antenna antenna performance.

Avoid placing high profile components next to antenna.

Radio module should not be placed next to other electronics which might interfere with the

2.4 GHz frequency band.

Ordering Information 15

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

6Ordering Information

Contact MicroRidge Systems to order MICRO-RM2.4 Radio Modules. The packaging options

of tray, and tape and reel are still being evaluated. There are also software options available for

the radio modules.

Radio Certification 16

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

7Radio Certification

United States (FCC)

This device complies with part 15 of the FCC rules. Operation is subject to the following two

conditions: (1) This device may not cause harmful interference, and (2) this device must accept

any interference received, including interference that may cause undesired operation. Any

changes or modifications not expressly approved by manufacturer could void the user’s authority

to operate the equipment.

IMPORTANT! Any changes or modifications not expressly approved by the party responsible for

compliance could void the user’s authority to operate this equipment.

47 CFR 15.505

For a Class B digital device or peripheral, the instructions furnished the user shall include the

following or similar statement, placed in a prominent location in the text of the manual:

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable

protection against harmful interference in a residential installation. This equipment generates,

uses and can radiate radio frequency energy and, if not installed and used in accordance with

the instructions, may cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation. If this equipment does

cause harmful interference to radio or television reception, which can be determined by turning

the 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 the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

Consult the dealer or an experienced radio/ TV technician for help.

The modular transmitter must be labeled with its own FCC ID number, and, if the FCC ID is not

visible when the module is installed inside another device, then the outside of the device into

which the module is installed must also display a label referring to the enclosed module. This

exterior label can use wording such as the following:

Contains FCC ID: 2ACNQRM2

The MICRO-RN2.4 Radio Module has a Modular approval and does not need separate approval

for this module when used on an application board.

Industry Canada (IC)

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is

subject to the following two conditions: (1) this device may not cause interference, and (2) this

device must accept any interference, including interference that may cause undesired operation

of the device.

Radio Certification 17

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio

exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: (1) l’appareil ne

doit pas produire de brouillage, et (2) l’utilisateur de l’appareil doit accepter tout brouillage

radioélectrique subi, meme si le brouillage est susceptible d’en compromettre le fonctionnement.

IMPORTANT! Tous les changements ou modifications pas expressément approuvés par la

partie responsable de la conformité ont pu vider l’autorité de l’utilisateur pour actioner cet

équipment.

This Class [B] digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe [B] est conforme à la norme NMB-003 du Canada

This modular transmitter must be labeled with its own IC ID. If the IC ID Certification Number is

not visible while installed inside another device, then the device should display the label on it

referring the enclosed module. In that case, the final end product must be labeled in a visible

area with the following:

Contains IC: 12298A-RM2

The MICRO-RN2.4 Radio Module has a Modular approval and does not need separate approval

for this module when used on an application board.

European Union (ETSI)

The MICRO-RN2.4 module has been certified for use in European Union countries. If this

module is incorporated into a product, the manufacturer must ensure compliance of the final

product to the European harmonized EMC and low voltage/safety standards. A Declaration of

Conformity must be issued for each of these standards and kept on file as described in Annex II

of the R&TTE Directive.

Furthermore, the manufacturer must maintain a copy of the modules' documentation and ensure

the final product does not exceed the specified power ratings, antenna specifications, and/or

installation requirements as specified in the user manual. If any of these specifications are

exceeded in the final product, a submission must be made to a notified body for compliance

testing to all required standards.

The 'CE' marking must be affixed to a visible location on the OEM product. The CE mark shall

consist of the initials "CE" taking the following form:

The CE marking must have a height of at least 5 mm except where this is not possible on

account of the nature of the apparatus.

The CE marking must be affixed visibly, legibly, and indelibly.

More detailed information about CE marking requirements you can find at "DIRECTIVE 1999/5/

EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL" on 9 March 1999 at section

12.

Contact MicroRidge 18

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

8Contact MicroRidge

Email:

Support: support@microridge.com

Sales: sales@microridge.com

Information: info@microridge.com

Phone:

Support: 541.593.1656

Sales: 541.593.3500

Main office: 541.593.1656

Fax: 541.593.5652

Mailing Address:

MicroRidge Systems, Inc.

PO Box 3249

Sunriver, OR 97707-0249

Shipping Address:

MicroRidge Systems, Inc.

56888 Enterprise Drive

Sunriver, OR 97707

Note: There is no mail delivery to this address. This address should only be used for

package delivery services such as UPS, FedEx, etc.

Web: www.MicroRidge-RM.com

Revision History 19

MicroRidge 2.4 GHz Radio Module

Version 1.2.4

9Revision History

Date Version Comments

9-3-2014 1.0.1 Preliminary release of MICRO-RM2.4 User Manual

9-12-2014 1.1.2 Minor revisions to preliminary manual.

10-30-2014 1.2.3 Changed radio module images to reflect final FCC & IC

certification numbers.

Revised text for FCC and IC in Radio Certification section.

10-31-2014 1.2.4 Minor word additions to Radio Certification section.

MicroRidge Systems RM2 2.4GHz Radio Module User Manual Micro RM24 Users Guide Ver 1 2 4

MicroRidge Systems, Inc. 2.4GHz Radio Module Micro RM24 Users Guide Ver 1 2 4

Users Manual

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