Low Power RF & Wireless Connectivity

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Low Power RF & Wireless Connectivity

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CC2550
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  • Forum Post: Re: Where can I find the Factory firmware for the CC2500/CC2550DK

    Kjetil
    Hi Adam, The CC2500/CC2550 are tranceivers / transmitters only, there is no code running on these as the external MCU handles all this. We do have example code available here: http://focus.ti.com/docs/prod/folders/print/cc2500.html You can also evaluate the radio performance etc. with the SmartRF04EB...
    on Oct 5, 2008

  • Forum Post: Current Consumption of CC2500 with WOR

    Gina
    Hello! I've just received the CC2500/CC2550 development kit and wanted to verify the current consumption values as mentioned in the datasheet ('electrical specifications, current consumption'). I encountered a problem by reconstructing the state Automatic RX polling every 15th second...
    on Aug 3, 2009

  • Wiki Page: Antennas in development kits

    Kjetil
    Q: FAQ: Antennas in development kits Antennas used in the Low Power Wireless development kits. 433 MHz development kits: - Badland SMAFF-433 ( www.badland.co.uk ) 868-915 MHz development kits: - CC11xx: Previously Nearson S331AM-915, has recently been changed to Nearson S463AM-915 ( www.nearson...
    on Nov 22, 2010

  • Wiki Page: Customizing [PREAMBLE+SYNC] patterns/lengths in CC110x/CC111x/CC1150/CC2500/CC251x/CC2550

    Kjetil
    Q: FAQ: Customizing [PREAMBLE+SYNC] patterns/lengths in CC110x/CC111x/CC1150/CC2500/CC251x/CC2550 by 611949 When [PREAMBLE+SYNC] auto-generation is enabled (MDMCFG2.SYNC_MODE = 1, 2, 3, 5, 6 or 7), the radio will automatically send [PREAMBLE+SYNC] before it outputs the packet payload + optional CRC...
    on Nov 22, 2010

  • Wiki Page: Basic procedure for entering/exiting SLEEP state in CC110x/CC1150/CC2500/CC2550.

    Kjetil
    Q: FAQ: Basic procedure for entering/exiting SLEEP state in CC110x/CC1150/CC2500/CC2550. by 611949 Before commanding the radio into SLEEP state it must initially be in IDLE state. A simple SPWD strobe command is then sufficient to initiate the SLEEP state entry, which takes effect after the CSn is...
    on Nov 22, 2010

  • Wiki Page: EMI shield

    Kjetil
    Q: FAQ: EMI shield by 613920 Does TI recommend an EMI shield to pass FCC? None of the reference designs make this recommendation. Usually TI LPW reference designs do not require an RF-Shield. This is generally achieved by filling ground on any available area not used for routing. This shortens...
    on Nov 22, 2010

  • Wiki Page: Effect of Manchester coding in CC111x/CC115x/CC251x/CC255x

    Kjetil
    Q: FAQ: Effect of Manchester coding in CC111x/CC115x/CC251x/CC255x by 611949 If Manchester coding is enabled in CC111x/CC115x/CC251x/CC255x, that is; [MDMCFG2.MANCHESTER_EN = 1], then all bits in the RF packet are Manchester coded. Consequently PREAMBLE, SYNC, ADDRESS, CRC are also Manchester coded...
    on Nov 22, 2010

  • Wiki Page: Sensitivity and link budget calculations

    Kjetil
    Q: FAQ: Sensitivity and link budget calculations Noise NF Range extension, S/N requirements . We got some experience data for sensitivity improvements: The noise factor has been retrieved by adding external LNA with known gain and noise characteristic and then monitored the enhanced sensitivity...
    on Nov 22, 2010

  • Wiki Page: Unmodulated Tx (CC1100,CC1150,CC2500,CC2550)

    Kjetil
    Q: FAQ: Unmodulated Tx (CC1100,CC1150,CC2500,CC2550) by 656199 Setting up an un-modulated carrier. Use syncronous serial mode with OOK: MDMCFG2 = 0x30 PKTCTRL0 = 0x12 CC11x0: PATABLE = 0xC3, 0xC3 (depends on wanted output level) CC25x0: PATABLE = 0xFE, 0xFE (depends on wanted output level)
    on Nov 22, 2010

  • Wiki Page: VIA and solderpaste coverage for LPRF transceivers

    Kjetil
    Q: FAQ: VIA and solderpaste coverage for LPRF transceivers The area under the chip is used for grounding and shall be connected to the bottom ground plane with several vias for good thermal performance and to minimize inductance to ground . In the reference designs available from the TI web site...
    on Nov 22, 2010

  • Wiki Page: Power layout tips for LPW transceivers

    Kjetil
    Q: FAQ: Power layout tips for LPW transceivers Power Tip 1: Use wide power planes, this give a star distribution of power with the plane as the common star point. Make sure that the decoupling capacitors are close to the DC-pins and use an individual ground via for each component. It is recommended...
    on Nov 22, 2010

  • Wiki Page: RF Testing in production

    Kjetil
    Q: FAQ: RF Testing in production The prototypes and the first batch should go through qualification testing. For later batches, samples can be submitted to qualification tests and remaining devices to production test. The level of testing must be seen in connection with cost and consequence of failure...
    on Nov 22, 2010

  • Wiki Page: Samples of LPRF devices

    Kjetil
    Q: FAQ: Samples of LPRF devices For samples of LPRF products, please see the following for direct sample requests: http://www.ti.com/home_b_samples
    on Nov 22, 2010

  • Wiki Page: Connector on CC EM modules

    Kjetil
    Q: FAQ: Connector on CC EM modules The PCB connector used on the EM (Evaluation Modules) for the chips mentioned above is: Samtec TFM-110-02-S-D-K-A. The connectors are 1200mils apart (centre to centre). More details, including the recommended footprint, can be found on: http://www.samtec.com/ftppub...
    on Nov 22, 2010

  • Wiki Page: Fixed vs Variable Packet Length Mode (CC1100,CC1101,CC1150,CC2500,CC2550)

    Kjetil
    Q: FAQ: Fixed vs Variable Packet Length Mode (CC1100,CC1101,CC1150,CC2500,CC2550) Using fixed or variable packet length when all packets have the same length. The advantage of using fixed packet length would be that the payload does not have to contain a length byte. That way packets can be one...
    on Nov 22, 2010

  • Wiki Page: Manchester encoding / decoding in synchronous serial mode.

    Kjetil
    Q: FAQ: Manchester encoding / decoding in synchronous serial mode. Manchester encoding/decoding can be enabled in synchronous serial mode, but the number of dummy bits needed to be sent at the end of a packet must be doubled. When using synchronous erial mode, the TX latency (the time from sampling...
    on Nov 22, 2010

  • Wiki Page: PCB Antenna for 2.4 GHz

    Kjetil
    Q: FAQ: PCB Antenna for 2.4 GHz Examples of PCB antennas are: Inverted F antenna that is used on CC2430DB. See Design Note DN007 . Meandered Inverted F is used on our CC2511 USB dongle reference design, see Application Note AN043 . Folded dipole antenna. See Application Note AN040 and...
    on Nov 22, 2010

  • Wiki Page: Strobe command SPI timing for CC110x/CC1150/CC2500/CC2550

    Kjetil
    Q: FAQ: Strobe command SPI timing for CC110x/CC1150/CC2500/CC2550 by 611949 A Strobe command can be issued immediately after the preceeding Strobe command, provided that the preceeding Strobe command has been completely transfered over the SPI interface. However, note that for SPI clock speed above...
    on Nov 22, 2010

  • Forum Post: Re: one way rf chip

    Firefighter
    Hi, Currently TI can offer two transmitter chips: CC1150 (Highly Integrated Multichannel RF Transmitter Designed for Low-Power Wireless Applications) and CC1070 (Single-Chip, Low-Power, Low-Cost CMOS FSK/GFSK/ASK/00K RF Transmitter for Narrowband & Multi-Ch Apps) in the sub-GHz domain. For...
    on Feb 2, 2011

  • Forum Post: CC1101: New boards can receive, but something is wrong with transmit

    Dan McFarland
    Hi, I just got some newly built prototype boards in and they all function exactly the same: they will reliably receive packets, but outgoing transmit data is very rarely received on the other end. We've built up several of these with this layout and the prior boards work just fine. Given that...
    on Mar 11, 2011

  • Forum Post: CC2500 Reliability Problem

    Kai Parow-Souchon
    Hey! we're currently working on a simple CC2550 to CC2500 connection but have some problems to get it working reliably. The CC2550 is transmitting with a constant datarate (2.4kbps/200kbps, doesn't matter), without exiting tx-mode (exit tx - start transmitting Preamble). The CC2500 receiver...
    on Sep 21, 2011

  • Forum Post: CC2550 SO(GDO1) PIN input current in SLEEP state.

    Demidou Aleks
    Help to understand. Why in SLEEP mode through the SO pin is current 30mkA?
    on Nov 8, 2011

  • Wiki Page: DN509 Data Whitening and Random TX Mode

    Glenn B
    This document gives an overview of the data whitening and random data transmission circuitry in the CC430, CC1100, CC1100E, CC1101, CC1110, CC1111, CC1150, CC2500, CC2510, CC2511, and CC2550 devices. http://www.ti.com/lit/swra322
    on Feb 2, 2012

  • Wiki Page: DN004 Folded Dipole Antenna for CC25xx

    Glenn B
    This document describes a folded dipole PCB antenna design that can be used with the following products from Texas Instruments: CC2500 CC2550 CC2510 CC2511 Maximum gain is measured to be 7.4 dB and overall size requirements for this antenna is 46 x 9 mm. Thus this is a compact, low...
    on Feb 2, 2012

  • Wiki Page: DN014 Programming Output Power on CC2500 and CC2550

    Glenn B
    The CC2500 and CC2550 RF output power level is set by the PATABLE register setting. This register setting also influences the power levels at the different harmonics and the current consumption for the device. These parameters must therefore be considered when choosing the optimal register settings....
    on Feb 16, 2012
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