User's Manual

UHF RFID Reader UR - SERIES User Manual v1.14
79
Profile2: Tari 25uS, Miller 4 300KHz;
Profile3: Tari 6.25uS, FM0 400KHz.
8.4.32 Synchronise EM4325 timestamp
The function of this command is to broadcast the timestamp to all the EM4325 tags within the
effective field.
Command frame:
Len
Adr
Cmd
Data[]
CRC-16
UTC Time
0x08
0xXX
0x85
4 bytes
LSB
MSB
Parameter definition
UTC Time: 4 bytes, the UTC timestamp to be broadcasted, most-significant byte first. It represent
the second amount since 1970-01-01 00:00:00. Synchronisation will fail if the MSB of UTC Time
is 0.
Response frame:
Len
Adr
reCmd
Status
Data[]
CRC-16
0x05
0xXX
0x85
0x00
——
LSB
MSB
NOTE:
1. EM4325 tag must stay in BAP mode to receive and synchronise timestamp.
2. Synchronisation will fail if the delivered MSB of UTC Time is 0.
3. Synchronisation will fail if any alert flag is set. Alert flag can be clear via the “Reset EM4325
alert” command or temporarily disable alert functions via modifying associated EM4325
registers.
4. EM4325 tags will no produce response to timestamp synchronisation command. Hence reader
will report successful status to host once timestamp synchronisation command is delivered to
tag.
5. Once the EM4325 internal UTC Time register is setup, this register will increase 1 in every
second. This timer will stop if the 4 bytes register overflow 0xFFFFFFFF and back to 0 or the
associated system configuration register in user area is modified.
8.4.33 Obtain EM4325 temperature data
The function of this command is to obtain temperature data from EM4325 tag.
Command frame:
Len
Adr
Cmd
Data[]
CRC-16
0xXX
0xXX
0x86
——
LSB
MSB