ATA559001-DBW Atmel, ATA559001-DBW Datasheet - Page 95
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ATA559001-DBW
Manufacturer Part Number
ATA559001-DBW
Description
RF Wireless Misc UHF (1kbit r/w anti- collis. Ni-Au)
Manufacturer
Atmel
Datasheet
1.ATA559001-6DSY.pdf
(107 pages)
Specifications of ATA559001-DBW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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14. Analog Timing
4817C–RFID–03/07
No status information byte will be sent during the stream.
A slot has the size of a bit. Each tag will calculate a slot number randomly, and modulate one bit
slot.
The wake-up command can be used to get a first impression how many tags are in the field or to
find out collisions and/or its pointers. As the wake-up command can be combined with a
group_select command or an anticollision command, the reader can therefore also create an
anticollision procedure.
For wireless communication between the reader and the tag(s), the ATA5590 must be powered
by the RF field. Therefore, the ramp up conditions are based on the field strength of the carrier
signal and its timing.
To operate, ATA5590 observes the power level continuously. POR and stand_by levels control
the functionality.
Table 14-1.
Notes:
For communication, ATA5590 can extract modulation changes of the carrier which are under
control of the reader. Modulation is based on a double sideband technique (PR-ASK) or a tradi-
tional ASK type. Both modulations result in an AM signal on the tag side, and therefore it can be
detected very easily by an RSSI circuit.
Signal
POR
Stand_by
1. If stand_by occurs during programming procedure, erase, or program, indicating flags will get
2. If the supply voltage is below the POR threshold value and the RF field comes back, the
a reset signal. The procedure is then finished, and the tag modulates the RF field.
status1 register will be refreshed.
Functionality Control
Comment
The circuit will be reset if the voltage level after the rectifier is less than the POR
threshold voltage.
The threshold voltage of the stand_by level is above the POR threshold voltage.
If the power supply voltage is above the stand_by threshold voltage:
- The oscillator is turned on (ramp-up phase)
- Operation of the circuit is enabled
If the power supply voltage is below the stand_by threshold voltage, the oscillator and
the current operation is stopped. Therefore, current consumption decreases.
ATA5590
95
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