Low Power RF & Wireless Connectivity

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Low Power RF & Wireless Connectivity

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  • Wiki Page: DN507 FEC Decoding

    Glenn B
    The CC1100, CC1100E, CC1101, CC1110Fx, CC1111Fx, CC1150, CC2500, CC2510Fx, CC2511Fx, and CC2550 all implement FEC encoding and decoding in HW. The purpose of this design note is to describe how one can implement the same FEC decoding in SW. This is in particular very important for the CC430Fx device...
    on Feb 24, 2012

  • Wiki Page: DN506 GDO Pin Usage

    Glenn B
    CC1100, CC1101, and CC2500 have three digital output pins, GDO0, GDO1, and GDO2, which are general control pins configured using IOCFG0.GDO0_CFG, IOCFG1.GDO1_CFG, and IOCFG2.GDO2_CFG respectively. There are several different signals that can be monitored on the GDO pins and hence be useful for the MCU...
    on Feb 24, 2012

  • Wiki Page: DN503 SPI Access

    Glenn B
    The purpose of this design note is to show how the SPI interface must be configured to be able to communicate with the CC1100/CC1101/CC1150/CC2500/CC2550. It also shows how the status bytes should be interpreted, how SW reset is done over the SPI interface, in addition to describing the different SPI...
    on Feb 24, 2012

  • Wiki Page: DN501 PATABLE Access

    Glenn B
    The CC1100/CC1101/CC1150/CC2500/CC2500 all have an eight bytes long PATABLE used for selecting PA power control settings. This design note will describe the different ways the PATABLE can be accessed and how the PATABLE for CC1150 and CC2550 is slightly different than it is for the CC1100, CC1101, and...
    on Feb 24, 2012

  • Wiki Page: DN500 Packet Transmission Basics

    Glenn B
    The CC1100/CC1101/CC1150/CC2500/CC2500 all have extensive built-in packet handling support in hardware. This is to make it easier to implement packet oriented radio protocols in firmware. However, it can sometimes be difficult to know what features to use for a specific application. This design note...
    on Feb 24, 2012

  • Wiki Page: DN300 SmartRF04EB Troubleshooting

    Glenn B
    This design note describes troubleshooting guidelines to solve problems related to communication with the SmartRF®04EB. A list of checkpoints presents questions that are normally asked when providing support for SmartRF®04EB. http://www.ti.com/lit/swra105
    on Feb 24, 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

  • 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: 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: 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

  • 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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
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