SLOA247C July   2017  – March 2019 RF430FRL152H , RF430FRL153H , RF430FRL154H

 

  1.   Frequently asked questions for RF430FRL15xH devices
    1.     Trademarks
    2. 1 General Questions
      1. 1.1 What is the RF430FRL15xH?
      2. 1.2 What are the variations of the RF430FRL15xH?
      3. 1.3 What is the recommended hardware and software to evaluate the RF430FRL15xH?
      4. 1.4 I cannot purchase a TRF7970AEVM. How do I use the RF430FRL152HEVM GUI?
      5. 1.5 Does the RF430FRL15xH support NDEF messages?
      6. 1.6 What RF communication range can be expected with the RF430FRL15xH?
    3. 2 Hardware and Design Questions
      1. 2.1  What TI Designs are available for the RF430FRL152H?
      2. 2.2  How do I design and tune an antenna to 13.56 MHz for my application?
      3. 2.3  Why are the various external components required?
      4. 2.4  How much power can be sourced from the RF430FRL15xH?
      5. 2.5  What battery can be used with the RF430FRL15xH?
      6. 2.6  How should the switches be set on the RF430FRL152HEVM?
      7. 2.7  How can an external sensor be connected on the RF430FRL152HEVM?
      8. 2.8  What kinds of analog sensors can be used?
      9. 2.9  How can a digital sensor be used?
      10. 2.10 How can the internal temperature sensor be used?
      11. 2.11 What are the settings to program the RF430FRL152HEVM with an MSP-FET tool?
      12. 2.12 Is there a low-voltage programmer suitable for the RF430FRL15xH?
    4. 3 Software Questions
      1. 3.1 How is the RF430FRL15xH ROM library used?
      2. 3.2 What example firmware is available for the RF430FRL15xH?
        1. 3.2.1 Default Project
        2. 3.2.2 SensorHub Project
        3. 3.2.3 NFC Project
      3. 3.3 Is there an Android app available to interface with the RF430FRL15xH?
      4. 3.4 What is the procedure to change between 4- and 8-byte ISO/IEC 15693 blocks?
      5. 3.5 How can custom ISO/IEC 15693 commands be sent and received?
      6. 3.6 How can a simple SD14 ADC conversion be set up and executed, and the result read back?
      7. 3.7 Where is the software for the TIDM-RF430-TEMPSENSE EVM?
    5. 4 Miscellaneous Questions
      1. 4.1 How can the SD14 ADC result be converted to temperature?
      2. 4.2 Is there a way to program RF430FRL15xH over-the-air?
      3. 4.3 How can the battery-less NFC/RFID temperature sensing patch be used?
      4. 4.4 Is the RF430FRL15xH available as a bare die?
    6. 5 References
  2.   Revision History

2.3 Why are the various external components required?

Figure 1 and Table 2 show the external components that are needed for the RF430FRL152H to operate.

app_cx_rf430frl152h_slas833.gifFigure 1. RF430FRL15xH Application Circuit

Table 2. External Capacitors

Name Value Description Comment
C4 10 nF Charge pump capacitor Needed for proper device operation
C5 100 nF Decoupling cap at VDD2X Needed for proper device operation
C7 1 µF Bypass capacitor between SVSS and VSS For proper ADC operation
C6 10 nF Decoupling cap at RST To prevent noise and unintentional resets
C2 2.2 µF Decoupling cap at VDDSW Power supply decoupling
C8 100 nF Decoupling cap at VDD Digital logic decoupling
C9 100 nF Decoupling cap at VDDH Power supply decoupling
C3 100 nF Decoupling cap at VDDB (if a battery is being used) To reduce ESR on a battery

When using the ROM library, as with the "Default" and "SensorHub" examples, some external resistors may be necessary. See Table 3 for specifics. If using the "NFC" example, this section does not apply.

Table 3. External Resistors

Pin Value Description Comment
19 (P1.7) 10 kΩ to 100 kΩ

Pullup: External host controller

Pulldown: Digital sensor used

If neither host controller nor digital sensor is used, then use a pullup.

Also this pin can be reused for JTAG.
20 (P1.6) 10 kΩ to 100 kΩ

I2C address set bit 1 of I2C address

SPI mode: sets the SPI Mode (1-4)

Necessary only if host controller mode is being used. Is a don't care when digital sensor mode is used.

Also this pin can be reused for JTAG.
21 (P1.5) 10 kΩ to 100 kΩ

I2C mode: set bit 0 of I2C address

SPI mode: sets the SPI Mode (1-4)

Necessary only if host controller mode is being used. Is a don't care when digital sensor mode is used.

Also this pin can be reused for JTAG.
8 (P1.3) Tie to GND or float

Tie low to enable I2C slave functionality for host controller.

High or floating on start-up enables SPI functionality for host controller.

Necessary only if host controller mode is being used. Is a don't care when digital sensor mode is used.

For more information, see the section on interfacing a host controller in the RF430FRL15xH firmware user's guide.