DEVKIT-M24LR-A STMicroelectronics, DEVKIT-M24LR-A Datasheet - Page 19

• Manufacturer Part Number: DEVKIT-M24LR-A
• Description: DEVELOPMENT KIT M24-LR64-R
• Manufacturer: STMicroelectronics
• Type: Development kitr

Specifications of DEVKIT-M24LR-A

• Featured Product: STM32 Cortex-M3 Companion Products
• Contents: 3 Antennas (1 External, 2 Reference for Tags), Cable, 2 Readers (EEPROM and RFID), Samples
• Product: RF Modules
• Maximum Frequency: 13.56 MHz
• Antenna: On-Board
• For Use With/related Products: M24LR-64-R
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10481

UM0853
3.2.4
The RF TAG ANSWER report button shows the RF answer from the tag, detected by the
RF reader.
Figure 29
the tag.
Figure 29. RF request and RF answer
The RF read request is at address 0000. The RF answer is the read data: FF D8 FF E0.
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 M24LR64-R datasheet.
The Non-addressed, Addressed or Select mode can be selected by clicking on the desired
mode as shown in
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 M24LR64-R device (please refer to the M24LR64-R
datasheet for details).
Figure 30. Selecting the Non-addressed mode
Addressed mode
Selecting the Addressed mode clears bit 5 and sets bit 6 in the Request_flags of the RF
request (bit 5 = 0, bit 6 = 1).
The request is addressed. The UID field is present (please refer to the M24LR64-R
datasheet for details).
After an Inventory command (see
click on an UID to select a specific tag. The desired UID will be sent with the request if the
Addressed mode is chosen.
If no specific UID tag is selected, the device sends “00 00 00 00 00 00 00 00” instead of the
UID value.
Figure 31. Selecting the Addressed mode
shows an example of a reader’s RF request and the corresponding answer from
Figure
30,
Figure 31
How to control the RF and I²C channels from your screen
Doc ID 16609 Rev 1
Section 3.2.1: Inventory
or
Figure
32.
command), you will be able to
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