MN63Y1208 Datasheet, PDF (89/120 Pages) Panasonic Semiconductor – Built-in 4-Kbit FeRAM non-volatile memory with fast write and low power consumption

7.3.2 Response to QUERY Command
When a response to QUERY command in tunnel mode is sent, the RFID reports the content of the command
from reader/writer to the host.
The address setting for response to QUERY is shown in Figure 7-2.
Bit 7 of upper byte is fixed to 0 and bit 6 is fixed to 1. Setting bit 6 to 1 indicates the RFID is in tunnel mode.
Bits 5 and 4 indicate mode.
Table 7-1 shows the meaning of mode of upper byte bits 5 and 4. These bits indicate whether the
communication in tunnel mode is plaintext (unencrypted) or encrypted (private or family key).
Start address (2 bytes)
Upper byte
Lower byte
msb
lsb msb
lsb
Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit
7654321076543210
Output 0 1 Mode
Start address designation
Figure 7-2 Address Setting for Response to QUERY Command
Table 7-1 QUERY Response Mode
Upper byte
Bit 5 Bit 4
0
0
1
0
1
1
0
1
Meaning
Plaintext (unencrypted) communication
Encrypted communication (private key)
Encrypted communication (family key)
Reserved
Note: Encrypted communication in tunnel mode should be controlled by the host (e.g., plaintext
communication is enabled or disabled) using the information of upper byte bits 5 and 4 of start address
for the response to QUERY.
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