ATA559001-6DSY Atmel, ATA559001-6DSY Datasheet - Page 63

• Manufacturer Part Number: ATA559001-6DSY
• Description: RF Wireless Misc UHF (1k bit r/w anti-collision)
• Manufacturer: Atmel

Specifications of ATA559001-6DSY

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4817C–RFID–03/07
Figure 8-6.
Figure 8-7.
Figure 8-8.
If the tag receives a “1” because the reader has detected an error in the backscattered CRC
stream, the internal crc_ok flag is set to fail, and the execution of the command is blocked. The
reader can send an EOF frame directly after this logical “1”. There is no need to send 16 sym-
bols during the CRC frame.
The CRC field is closed by an EOT sequence.
The backscatter coding style during the CRC field is based on the selected coding style of the
command which was sent before.
The timing of the coding is based on the timing of 0*, which was transmitted in the forward
header.
The tag expects at least one acknowledge bit. If more then 16 acknowledge bits are received,
the CRC value is backscattered in a loop.
Notes:
backscatters
1. The tag backscatters the inverted internal CRC value.
2. The position of the EOF symbol which is responsible for the switch mechanism has to be at the
3. If the position of the EOF symbol is inside the data frame, the command will not be accepted,
transmits
Reader
Tag
Tag backscatters
Reader transmits
position of the first CRC bit (default mode).
and the tag will be asynchronous to the reader stream (EOF-wrong_position).
Tag backscatters
Reader transmits
Default Full-duplex Communication Flow at the Data-CRC Boundary
Switching Mechanism to Change to the Adaptive Forward Link CRC
Switching Mechanism to Adaptive Forward Link Showing an Error Signalling
Condition
LSB + 1
LSB + 2
Data section
LSB + 1
LSB + 2
LSB + 1
LSB + 2
LSB + 1
LSB
Data section
Data section
LSB + 1
LSB
Data section
LSB + 1
LSB
Data section
EOF
LSB
Data section
EOF
LSB
MSB
LSB
"0"
MSB
CRC section
CRC section
CRC section
MSB - 1
ok
"0"
MSB-1
MSB
MSB
"0"
CRC section
CRC section
CRC section
MSB - 1
"0"
ATA5590
MSB - 2
"1"
fail
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