Write Afi Command Example - Texas Instruments TRF7970A User Manual

Using the TRF7970A EVM With PC GUI
2.3.10 Write AFI (Command Code 0x27)
The Write AFI Command is an optional command that writes a value to the AFI memory block on the
VICC. For TI, TI based, and some other manufacturers' VICCs, the Option_flag must be set in the request.
This command can be sent as an addressed or unaddressed request, and the VICC returns an error/no
error response after the write operation has been completed.
To perform Write AFI using the GUI:
1. Select the radio button for Write AFI.
2. Select Tag Flags accordingly (see
3. Click Set Protocol.
4. Enter AFI value to be written (in hex).
5. Place tags or transponders near enough to the TRF7970A EVM antenna to be read.
6. Click Execute.
20
TRF7970A Evaluation Module (EVM)
Figure 14 for one example, note use of option flag)
Figure 14. Write AFI Command Example
Copyright © 2011, Texas Instruments Incorporated
www.ti.com
SLOU321 – August 2011
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