MN63Y1208 Datasheet, PDF (115/120 Pages) Panasonic Semiconductor – Built-in 4-Kbit FeRAM non-volatile memory with fast write and low power consumption

Figure 9-2 shows the detail of exclusive control in tunnel mode.
When the RFID receives a command from the host during tunnel mode command reception and before IRQ
output, it sends a response with BUSY and then outputs IRQ.
When the RFID receives a command (other than QUERY) from the host after IRQ output, it responds with
BUSY to the command.
Issuing a serial interface command before generating IRQ
Exclusive control period
RF I/F
Command
Response
Slave reception
Command
Slave transmission
NIRQ
Response with
BUSY
IRQ generated
Issuing a serial interface command after generating IRQ
Exclusive control period
RF I/F
Command
Response
Slave reception
Slave transmission
NIRQ
Command other
than QUERY
Response with
BUSY
IRQ generated
Figure 9-2 Exclusive Control in Tunnel Mode
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