MN63Y1208 Datasheet, PDF (86/120 Pages) Panasonic Semiconductor – Built-in 4-Kbit FeRAM non-volatile memory with fast write and low power consumption

Chapter 7 Tunnel Mode
7.1 Tunnel Mode Sequence
This section describes the sequence of tunnel mode, which is shown in Figure 7-1.
SNo.1: Reader/writer sends a tunnel mode command to RFID.
SNo.2: RFID receives the tunnel mode command and issues an interrupt request (IRQ) to the host.
SNo.3: If VDDEX is not applied, the host applies VDDEX.
SNo.4: The host sends a QUERY command (inquiry) to RFID.
SNo.5: RFID sends a response to the QUERY command to the host. The response includes data of the tunnel
mode command in step SNo.1.
SNo.6: The host sends an ANSWER command (notification of the result) to RFID. The command includes
data to be sent to reader/writer.
SNo.7: RFID receives the ANSWER command and sends a response (processing result; Normal end or
Error) to the command to the host.
SNo.8: After sending the response to the ANSWER command in step SNo.7, RFID sends the data of the
ANSWER command to reader/writer as a response to the tunnel mode command.
For more information about tunnel mode operation, see Section 9.2 State Transition Diagram in Operation
Mode, Section 9.3 Flow Chart in Tunnel Mode, or other related sections.
R/W
RFID
Host
SNo.1
Tunnel mode command
IRQ notification
VDDEX applied
SNo.2
SNo.3
Response to tunnel mode command
SNo.8
QUERY command
Response to QUERY command
ANSWER command
Response to ANSWER command
SNo.4
SNo.5
SNo.6
SNo.7
Figure 7-1 Tunnel Mode Sequence
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