ATA559001-DDT Atmel, ATA559001-DDT Datasheet - Page 65

• Manufacturer Part Number: ATA559001-DDT
• Description: RF Wireless Misc UHF (1kbit r/w anti-collision)
• Manufacturer: Atmel

4817C–RFID–03/07
Table 9-1.
Figure 9-1.
Symbol/Function
1
Main timing, accuracy, and
power management for the
return link
2
Timing reference
3
Same timing as the fourth
symbol
4
Timing reference for EOF
detection
st
nd
rd
th
symbol
symbol
symbol
symbol
Modulation during the
Modulation during the
Modulation during the
NRZI hard is selected
NRZI soft is selected
The return header
Features and Agreements of the Return Header
Modulation During the Return Link Header (No Error Signalling Included)
Level2send_header
FM0 is selected
return header if
return header if
return header if
3phase1 selected
Return Link Modulation
Inside the Symbols
NRZ modulation on, or
sub-carrier
Modulation off, or
sub-carrier
Tag backscatters a logical
1 which corresponds to
the type of modulation and
the timing reference of the
2
4
The modulation is like “0”
nd
th
symbol
sub_symbol
1
st
symbol
1/2 symbol
symbol
2
nd
3
Comment
Can be used by the reader to adapt the
baud rate of the return link.
The sub-carrier indicates that the tag is
not able to support the required address.
- 3phase1 control
- FM0 control
- Deterministic anticollision control
Note: there is a timing shift for NRZI
soft-locked modulation type, if selected
The sub-carrier indicates that the tag is
not able to support the transmitted
parameter setting.
When using NIRZ, the modulation is on.
The value for level2send_old is also set
to “0”
rd
symbol
symbol
EOT* return
1/4 symbol
ATA5590
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