MN63Y1208 Datasheet, PDF (56/120 Pages) Panasonic Semiconductor – Built-in 4-Kbit FeRAM non-volatile memory with fast write and low power consumption

Chapter 4 RF Communication Mode
4.3.8.3 FWI (Frame Waiting Time Integer)
Figure 4-24 shows the format of FWI (Frame Waiting time Integer). FWI is used to specify the maximum wait
time until the PICC sends a response after receiving a command.
Figure 4-24 FWI Format
The maximum wait time is calculated by the following formula:
Maximum wait time = T × 2^FWI
T: 256 × 16/fc (fc = 13.56 MHz, approx. 0.302 ms)
FWI: 0 to 14 (integer)
The maximum wait time ranges from approximately 0.302 ms (min.; FWI = 0) to approximately 4949 ms (max;
FWI = 14).
4.3.8.4 File System
This RFID is compliant with the command specification of ISO/IEC7816-4 standards, but does not implement
the file system functionality of the standards. However, in order to ensure the compatibility with
communication to reader/writer, the SELECT command to select files is set to "Normal response" when
specifying the given parameters. For information about how to set the parameters of the SELECT command,
see 4.3.9.4 SELECT.
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