UM0853 datasheet(21/56 Pages) STMICROELECTRONICS

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UM0853

How to control the RF and I²C channels from your screen

Doc ID 16609 Rev 3

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3.2.3

Get System Info command

The Get System Info button launches a Get System Info command, thus filling the System

info fields.

Figure 30.

Get System Info button

3.2.4

Viewing RF requests and answers

Figure 31.

RF TAG REQUEST/ANSWER report

The RF TAG REQUEST report button shows the RF request sent by the RF reader to the

tag.

The RF TAG ANSWER report button shows the RF answer from the tag, detected by the

RF reader.

Figure 32 shows an example of a reader’s RF request and the corresponding answer from

the tag.

Figure 32.

RF request and RF answer

The RF read request is at address 0000. The RF answer is the read data: FF D8 FF E0.

3.2.5

Selecting the RF mode

The RF ISO 15693 protocol allows the user to communicate in RF in three different modes:

the Non-addressed mode, the Addressed mode and the Select mode. For further details,

please refer to the M24LRxx datasheet.

The Non-addressed, Addressed or Select mode can be selected by clicking on the desired

mode as shown in Figure 33, Figure 34 or Figure 35.

Non-addressed mode

Selecting the Non-addressed mode clears the bits 5 and 6 in the Request_flags of the RF

request (bit 5 = 0, bit 6 = 0).

The request is executed by any M24LRxx device (please refer to the M24LRxx datasheet for

details).

UM0853 Datasheet(PDF) 21 Page - STMicroelectronics