Features

• 2.4-GHz direct sequence spread spectrum (DSSS) radio transceiver
• Operates in the unlicensed worldwide industrial, scientific, and medical (ISM) band (2.400 GHz to 2.483 GHz)
• 21-mA operating current (transmit at –5 dBm)
• Transmit power up to 4 dBm
• Receive sensitivity up to –97 dBm
• Sleep current less than 1 μA
• DSSS data rates up to 250 kbps, Gaussian frequency-shift keying (GFSK) data rate of 1 Mbps
• Low external component count
• Auto transaction sequencer (ATS) - no MCU intervention
• For more, see pdf
   

Functional Overview

The CYRF7936 IC is designed to implement wireless device links operating in the worldwide 2.4-GHz ISM frequency band. It is intended for systems compliant with worldwide regulations covered by ETSI EN 301 489-1 V1.41, ETSI EN 300 328-1 V1.3.1 (Europe), FCC CFR 47 Part 15 (USA and Industry Canada), and TELEC ARIB_T66_March, 2003 (Japan).

• 1 second
• 5 seconds
• 30 seconds
• 1 minute
• 5 minutes

For example, when the report interval is 30 seconds, a data packet is sent once every 30 seconds. The size of the data packet is uniform (7 bytes) for all five report interval values. The lowest report interval (1 second) gives you the fastest data rate.

The firmware changes its current report interval value to next value when the SW2 button on RF Expansion Card (FTRF) is pressed for more than 2 seconds. If current report interval value is 1 second, the firmware changes it to 5 seconds. If the current report interval value is 5 minutes it rolls back and changes the report interval to 1 second.

Follow this procedure to change the report interval value:

Figure 1 RF Expansion Card (FTRF)

• Press the SW2 button for more than 2 seconds
• Release the button when the red LED glows continuously. When SW2 is pressed for more than 2 seconds the firmware changes the report interval to next value and lights the red LED continuously.
• Look at the red LED immediately after you release the SW2 button. The red LED blinks a finite number of times to indicate the current report interval value as shown below.

Features and Overview

• Protocol stack that implements node functionality to support a wireless star network consisting of one hub and up to 250 nodes
• Provides reliable two way communication between a hub and node
• Dynamic data rate (up to 1 Mbps) and output power according to the channel noise level and packet loss rate
• Operates in the unlicensed worldwide Industrial, Scientific, and Medical (ISM) band (2.400–2.483GHz)

The CyFi™ Star Network Protocol Stack (CYFISNP) User Module is designed to address up to 250 general purpose nodes; it provides reliable two way communication between the hub and node(s). The hub is assumed to be wall powered, while the nodes may be either wall powered or powered by an alkaline (low impedance) or coin-cell (high impedance) battery.

• CapSense Touch Sensing controlling the color of LEDs
• Temperature Sensing controlling the color and blinking rate of 3 LED and the sound of a buzzer
• Light Sensing controlling the intensity of a LED
• CapSense Proximity Sensing controlling the color of LEDs
   

• Additional designs possible utilizing above sensing and control functionality
• Functional pins are accessible for further evaluation and development
• Detachable multifunction expansion card enables adding the kit to system boards
• USB connectivity for convenient plug and play operation
   

To learn more about the PSoC FirstTouch Starter Kit, please visit www.cypress.com/go/FirstTouch.

To learn more about PSoC programmable system-on-chip, please visit www.cypress.com/go/PSoC.

To learn more about PSoC Designer software, please visit www.cypress.com/PSoCDesigner.

 

Software Title	Description	Link
PSoC Designer	This kit requires PSoC Designer for development
PSoC Programmer	This kit requires PSoC Programmer for programming

Following is the list of Kits tested and their respective web links

1. CY3655-EXT :Encore-II Development Kit

             weblink: www.cypress.com/go/cy3655-ext

Download CY3655-EXT_Firmware_PSOC_Designer_5_2.zip

2. CY3631 :Wireless Manufacturing Test Kit

             weblink: www.cypress.com/go/cy3631

Download CY3631_WirelessUSB_MTK_Firmware_PSOC_Designer_5_2.zip

3. CY4623:EncoreII Mouse Reference Design

             weblink: www.cypress.com/go/cy4623

Download CY4623_RDK_Firmware_PD_5_2.zip

4. CY4672:PROC Lp Keyboard/Mouse Reference Design

             weblink: www.cypress.com/go/cy4672

Download CY4672_Firmware_Examples_PSOC_Designer_5_2.zip

5.CY4638:VOIP Demo kit

             weblink: www.cypress.com/go/cy4638

Download CY4638_Firmware_Examples_PSOC_Designer_5_2.zip

6.CY3660:Encore V LV Development Kit

             weblink: www.cypress.com/go/cy3660

Download CY3660_Firmware_Examples_PSOC_Designer_5_2.zip

Note:Please download and install PSOC designer 5.2 prior to testing the firmware examples.The weblink to PSoC designer is mentioned on above listed Kit weblinks.

AWA24S Data Sheet

Unfortunately, we do not have a Gerber files for this ArtaFlex Module. Please contact Artaflex Support for information on this.

1. Manually change CYFISNP UM configuration name in PSoCConfig.xml using notepad:

    a.  Ensure PSoCConfig.xml located at subfolder of your project has read/write access and open it using notepad;
    b.  Depending on the configuration used in your project change all occurrences of OLD CONFIG NAME to NEW CONFIG NAME as noted below

    c.  Save the PSoCConfig.xml

2. Exclude old library files from project

    a.  Open the project in latest PSoC Designer release
    b.  Update CYFISNP UM as prompted
    c.  In Workspace Explorer under "lib->Library Source Files" and "lib->Library Header Files" sections locate all CYFISNP-related files, click right mouse button on each of them and select "Exclude From Project"

3.  Generate and build your project

Note: This problem is specific for projects created in releases prior to PSoC Designer 5.0 SP6. This has been fixed in the latest version of PSoC Designer 5.1.

CYRF7936 can be used for data acquisition and other sensor network systems.  This uses the Cypress proprietary CYFI protocol which is supported by PSoC1 family of devices (which has a flash above 8K, like CY8C20xx6, CY8C24x94 CY8C27xxx, CY8C29xxx). The entire low level driver and the CYFI protocol stack are taken care by the CYFISNP user module available in the PSoC Designer.

Additional information on CYFI protocol and kit

1. A CYFI Demo is available in this link.

2. To understand the working of CYFI Star Network Protocol look into CYFISNP Datasheet

3. The kit contents of CY3271 can be downloaded from this link.  The Kit guide elaborately explains how to evaluate the projects in the kit.

However the range varies depending  on the surrounding noise.

The following are the network parameters for the hub in the Star network protocol.

• SOP Index
• Base Channel
• Channel Hop
• Hub CRC Seed
• Node CRC Seed (2 bytes)

The above parameters are automatically selected by the Star Network Protocol User module using the unique MID of the Radio on the hub.

No, the CYRF7936, based on the CYFI technology is NOT backward compatible with the previous versions of the radio modules belonging to the LR/ LS/ PRoC LR families .

The maximum power is +4dbm without the external power amplifier and +20 dbm with the external power amplifier.

The below describes the lower-level actions by the hub and node in bind mode, to see more details please refer to the CYFISNP user module datasheet available in PSoC Designer 5.0 Service Pack 2.

For a hub:

•  Activate the shared bind network parameters
• Hop through the shared channel sequence and listen for bind request packet
• If a bind request packet is received, return a bind response that contains the hub's operating network parameters and return to data mode
• If no bind request is received, return to data mode

For a node:

• Activate the shared bind network parameters
• Hop through the shared channel sequence, transmit bind requests and listen for a bind response
• If a bind response is received then store the hub's operating network parameters and go to connect mode to establish the network connection
• If no bind response is received then go to idle mode (most node applications, this is sleep mode)

General note:

Apply above response if you try to reprogram the FTMF and get something similar to:

• • Program Finished at 2:45:51 PM
  • Programming Terminated
  • Check Device/Family Setting or Programming Mode
  • Acquired Device "Silicon: 0038, Family/Die: 15, Major Rev: A" does not match chosen Device
  • Matching Devices:
  • CY8C21434-24LFXI Program Requested at 2:45:49 PM

Graphical Data Display Application
- Graphical User Interface to bind nodes and display wireless sensor values
- Features:
-- Graphical and textual displays of data
-- Data aggregation displays to view long periods of data in a small window
-- Sensor data calibration (single point, dual point or multi-point calibrations)
-- Exporting of data to a file for data analysis in other programs (e.g. spreadsheet applications)
-- Many more features and capabilities

Simple Debug Utility
- Graphical User Interface to bind nodes and view data transmitted to the RF Hub
- Console capability enabling graphical command-access to the RF Hub

SCD Software is available in this link: http://www.cypress.com/?rID=40364

Rule of thumb: If the PSoC device can interface to the type of sensor you are interested in, then the CyFi part of the system can easily transmit the data. And, PSoC devices can interface to a wide array of sensors. For example, with the CY3271-EXP1 expansion kit you can evaluate how PSoC devices interface to environmental sensors such as pressure, humidity and other forms of ambient light and temperature sensing. In addition, we've developed thermocouple, PIR, Gyro, accelerometer and many other sensing solutions with PSoC devices. If you have a particular sensor you'd like to discuss in regards to a PSoC devices ability to interface with, please contact us at firsttouchkit@cypress.com.

Example: If The Maximum Number of Nodes parameter value is 60 and the BCD Payload Max propertyvalue is 1, then the resulting array uses 60*(3+1) = 240 bytes of RAM.

If the value of the BCD Payload Max parameter is zero, the hub does not allocate any RAM for back channel data buffers.

• Protocol stack that implements hub or node functionality to support a wireless star network consisting of one hub and up to 250 nodes
• Provides reliable two way communication between a hub and node
• Dynamic data rate (up to 1 Mbps) and output power according to the channel noise level and packet loss rate which helps in power optimization.
• Operates in the unlicensed worldwide Industrial, Scientific, and Medical (ISM) band (2.400–2.483GHz)

http://www.cypress.com/?rid=17759

http://www.cypress.com/?rid=34234

http://www.cypress.com/?rid=34235

http://www.cypress.com/?rid=34236

1. Go to www.cypress.com.  On the top right, you will see a “Keyword / Part Number” search box (adjacent to “Contact Us.”) 

2. Select the “Part Number” tab above this text box.

3. Type the exact part number, for example CY8C29466-12PVXE.

4. The part number will be listed in the search results page.

5. Click on the part number link (1st column starting from the left). This will open a new web page.

Moisture Sensitivity Level (MSL) can be found by clicking the “Quality & Pb-free Data” link on the top, or by just scrolling down to the Quality & Pb-free Data” section about half way down the page.

All other Quality information for this part number (e.g., RoHS compliance, Lead/Ball Finish, Qualification Reports, IPC reports) can also be found on this web page. 

In case of any questions, or if the information is not available for a particular part number, please create a support case at www.cypress.com/support

If you do not know the Cypress part number: 

1. Go to www.cypress.com.  Browse the different products (“Products” tab on the top navigation menu) by family.

2. Once you choose the relevant product family (e.g., “Clocks and Buffers->Clock Distribution,” “Memory->FIFOs”), scroll down the particular page to get to the “Parametric Product Selector.”

3. Use this tool to find the part number by function/feature, and click on the part number you are interested in. This will lead you directly to step # 5 above.

To access Sense and Control Dashboard archives please Click Here

1. Deep sleep – Drive Mode Strong – Logic level High
2. Normal Sleep – Drive Mode Strong – Logic level – retains state based on input (depending on toggle, delay off etc.,)
3. Sensor Disabled or Sensor did not pass the Failure Mode Analysis – Drive mode Strong – 5 ms active low pulse on POR and later logic level high (see datasheet for more info)

This article explores the technology involved in interfacing of sensors for medical applications, using hospital beds as an example. Hospitals are places where all of us have felt the need for a little more comfort, and hospital beds/mattresses can be made more comfortable through technological improvements possible using sensors and microcontrollers. Making patients more comfortable helps the patients, doctors, and also medical caretakers. To read more, click the download link above, or visit Embedded.com.

For better understanding of CYFI protocol it is strongly reccomended to go through following contents.

1. CYFI kit contents may be downloaded from here

2. CYFI Video lectures are available in the following page.

3. CYFI Kit Application demo is shown here

Note: The CYFISNP user module data sheet gives a very detailed explaination of the protocol

The RF modules provided by cypress communicate in channels of bandiwth 1MHz,  98 such channels in the ISM band from 2.400 GHz to 2.498 GHz are used. RSSI gives the enviroment strength at that point of time. For more infomration on RSSI read through this link. RSSI is used by the transmitter to search for a quiter channel. If the channel has more noise the transmitter can jump in to another channel until it finds a quiet channel.

The typical RSSI value read in noise free channels is 20. The RSSI value can also be read at the receiver end. However this will not help in estimating the distance from the transmitter. Suppose the receiver and the transmitter are both on  channel ' X '. Now the reciever reads RSSI on channel 'X', the RSSI value read is due to all the sources present in the channel along with transmitter. So it is difficult to distinguish the signal(sent by transmitter) from the noise(due to other sources on same channel). Hence the distance cannot be estimated based on RSSI value.   

The alternative to infrared remote control technologies is RF-based remote controls. RF-based remote controls overcome three major limitations of infrared technologies: line-of-sight and range; one-way communications; and high power consumption. Let’s take a look at each of these limitations and attempt to better understand why the primary interface to our home entertainment, the remote control, continues to be based on a 1980s era technology and how this will change, especially with the introduction of the RF4CE consortium and standards. To read more, click the download link below or visit Digital Home DesignLine.

Cypress’s new CyFi Low-Power RF solution, however, addresses all of these challenges in an uncompromising way. It provides a highly reliable, longer range solution that is extremely simple to design and operate, and offers the best system power-efficiency in the market. To read more on this topic, click the download link above.

SAN JOSE, Calif., January 29, 2009 - EDN magazine has recognized the CyFi™ Low-Power RF solution from Cypress Semiconductor Corp. (NYSE: CY) in the 2008 Hot 100 Products issue. EDN editors sort through thousands of new products and technologies introduced each year to identify items they consider innovative and newsworthy enough to cover in print or online. EDN's annual Hot 100 Products list represents the best of the best products and technologies in 2008 as selected by the editors. The EDN product review of the CyFi solution is available at www.cypress.com/go/pr/cyfihot100."

The CyFi Low-Power RF solution delivers the industry's leading combination of reliable connectivity, power-efficiency and superior range, and is supported by the flexible and easy-to-use PSoC® programmable system-on-chip. The solution is optimized for low-power wireless sensor networks in a broad range of applications, including home and building automation, health/fitness equipment, industrial monitoring, and remote controls. More information about the solution is available at www.cypress.com/go/pr/CyFi.

"We are pleased to have the respected EDN editors recognize CyFi Low-Power RF as one of the Hot 100 products of 2008," said Dave Kranzler, vice president and general manager for HID, Timing, and RF products at Cypress." "The ease-of-use of the solution and the reliable, low-power transmissions it delivers have also earned a strong customer design win pipeline."

CyFi Low-Power RF enables designers to quickly and simply implement wireless systems without compromising reliable performance or low-power consumption. The solution contains all of the components needed to build an RF-enabled low power embedded control system: the CyFi protocol stack in PSoC Designer™ embedded design software, the selected PSoC device, and the CyFi transceiver (CYRF7936). With the configurable analog and digital blocks of PSoC and the customizable firmware modules in PSoC Designer, customers can optimize the CyFi solution for their application to minimize space, power, and silicon BOM cost.

About CyFi Low-Power RF
The CyFi solution uses Direct Sequence Spread Spectrum (DSSS) modulation to maximize coding gain and allow the CyFi receiver to recover the signal when faced with interference. The solution intelligently hunts for and selects a clear channel from among 80 narrowband 1 MHz channels to successfully co-exist with other 2.4-GHz communications systems, such as 802.11n WiFi. No other 2.4-GHz solution combines DSSS modulation with this level of frequency agility. The solution is also unique in its ability to dynamically modulate both its output power level and data rate to optimize for robust communication as well as long battery life.

The CyFi protocol stack has the smallest memory footprint of any comparable wireless solution at 5.5K in Flash, leaving room for additional system functionality in the PSoC controller. Designers can use the compact protocol stack to build a complete wireless star-topology network with fewer peripherals and greater functionality. The protocol stack has a network capacity of up to 255 nodes per hub, all with asynchronous, bi-directional communication.

About Cypress
Cypress delivers high-performance, mixed-signal, programmable solutions that provide customers with rapid time-to-market and exceptional system value. Cypress offerings include the PSoC® programmable system-on-chip, USB controllers, general-purpose programmable clocks and memories. Cypress also offers wired and wireless connectivity technologies ranging from its CyFi™ Low-Power RF solution, to West Bridge® and EZ-USB® FX2LP controllers that enhance connectivity and performance in multimedia handsets. Cypress serves numerous markets including consumer, computation, data communications, automotive, and industrial. Cypress trades on the NYSE under the ticker symbol CY. Visit Cypress online at www.cypress.com.

# # #

Cypress, the Cypress logo and PSoC are registered trademarks and CyFi and PSoC Designer are trademarks of Cypress Semiconductor Corp. All other trademarks are property of their owners.

Joint Webinar With Artaflex Offers Practical Considerations to Overcome Power, Reliability and Range Challenges; Shows how CyFi™ Low-Power RF Simplifies and Speeds Implementation

SAN JOSE, Calif., February 17, 2009 - Cypress Semiconductor Corp. (NYSE: CY) today announced a free, online seminar that leads participants through the challenges of embedded wireless design, including passing government certification tests. The 60-minute webinar, entitled "Practical Considerations for Embedded Wireless Design & Certification," will be presented in conjunction with Electronic Design on Wednesday, February 25 at 9:00 a.m. PST. On-line registration is available at www.cypress.com/go/PR/PracticalConsiderationWebinar.

Consumers are demanding wireless capabilities in embedded systems to increase productivity and mobility, as well as to save energy.  Designers of systems from headsets to industrial process monitoring and automation are looking to 2.4 GHz low-power RF solutions to differentiate and improve their products.  However, designers must overcome barriers such as power, reliability, range and other RF challenges.

In this webinar, Cypress and a leading embedded wireless design firm, Artaflex, will introduce a set of practical considerations for embedded wireless design and certification." These concepts can be applied in part or whole to any 2.4 GHz wireless project. The presenters will also describe best practices for obtaining government certifications in the U.S., Canada and Europe.  In addition, the webinar will introduce a design path that can save time through the use of pre-certified RF modules and Cypress's CyFi™ Low-Power RF solution.

"It's easy to see the benefits of adding wireless to embedded systems," said Geoff Charubin, vice president of Global Marketing and Applications. "But it isn't easy to actually implement and get government certification. The webinar offers straightforward, useful information that can help in both areas."

About CyFi Low-Power RF
The CyFi Low-Power RF solution enables designers to quickly and simply implement wireless systems without compromising reliable performance or low-power consumption. The solution consists of the CyFi protocol stack in PSoC Designer™ embedded design software, the selected PSoC® programmable system-on-chip, and the CyFi transceiver. The solution's unrivaled interference immunity is a result of its modulation and the agility to move to 80 channels in the 2.4-GHz band. It is optimized for low-power wireless sensor networks and human-to-machine interfaces in a broad range of applications, including home and building automation, remote controls, health and fitness equipment, and industrial monitoring.

The CY3271 PSoC FirstTouch™ Starter Kit with CyFi Low-Power RF is a low-cost USB thumbdrive kit including PSoC IDE software, a sense and control dashboard for data collection, a PC dongle with RF, a multifunction board, an RF expansion board with power amplifiers for long-range wireless applications, and two battery boards. Designers can also use the kit to leverage the touch-sensing, temperature-sensing, lighting-sensing and proximity sensing capabilities of PSoC devices. For more information on CyFi Low-Power RF and to order kits, visit www.cypress.com/go/PR/CyFi.

About Cypress
Cypress delivers high-performance, mixed-signal, programmable solutions that provide customers with rapid time-to-market and exceptional system value." Cypress offerings include the PSoC® programmable system-on-chip, USB controllers, general-purpose programmable clocks and memories. Cypress also offers wired and wireless connectivity technologies ranging from its CyFi™ Low-Power RF solution, to West Bridge® and EZ-USB® FX2LP controllers that enhance connectivity and performance in multimedia handsets. Cypress serves numerous markets including consumer, computation, data communications, automotive, and industrial. Cypress trades on the NYSE under the ticker symbol CY. Visit Cypress online at www.cypress.com.

# # #

Cypress, the Cypress logo, PSoC, West Bridge and EZ-USB are registered trademarks, and CyFi, PSoC Designer, and FirstTouch are trademarks of Cypress Semiconductor Corporation. All other trademarks are the property of their

Response: The CyFi radio modem supports 98 discrete 1 MHz channels (regulations may limit the use of some of these channels in certain jurisdictions). In total you can use 78 channels effectively. This 78 channels can be divided into 6 mutually exclusive channel subsets. The Base Channel is the starting channel in the channel sequence of a subset. Each of the 13 channels in a subset has 6 MHz spacing. For example, the channel subset for a base channel 5 includes the following channels {5,11,17,23,29,35,41,47,53,59,65,71,77}

This article explains why these specifications are misleading and how they can lead designers to choose non-optimal approaches. It will show how to accurately evaluate power consumption and range, how to use link budgets, and how to work with current profiles to maximize sleep time, minimize retries, and avoid interference.  To read more, click the download link below or visit RF Design Line.