ATA559001-DBW Atmel, ATA559001-DBW Datasheet - Page 54
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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8.1.4
8.1.5
54
ATA5590
Accuracy Aspects of the Timing — Internal Oscillator
Header_ok Check
The timing of the ATA5590 is based on an on-chip oscillator. The typical frequency is 420 kHz at
25°C at the die level. The tolerance of the oscillator is –10 to +40%.
As the oscillator runs asynchronously to the clock ticks coming from the reader, the timing differ-
ence between 0* and the following data 0 shall be 2 oscillator clocks at a minimum rectangle
modulation in the far field. The same rule applies for data 1’s and EOT*.
ATA5590 checks the header timing on the fly. If the timing check passes, the tag is able to
receive the rest of the stream.
If the header_ok check results in a fail, the tag restarts, in search of a valid header.
Figure 8-2.
Note:
The header_ok result influences the sync condition.
New command
Header_ok Check
Receive data frame
Set header_ok = 1
Time EOF* < 0*
Reset forward
notch
Fifth
notch
First
Set forward
Store EOF*
Fourth
notch
Second
notch
Store 0*
notch
Third
Store 0*
4817C–RFID–03/07
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