Figure 3-4. ATA5567 Traceability Data Structure
Example:
"E0"
"15"
"00"
"41"
8
1
...
8
9
... 16 17 ... 24 25 ... 32
Bit No.
Block 1
ACL
MFC
CID
ICR
LotID
LSB
63 MSB
...
...
32
0
Bit value
31
LotID
Wafer #
12 13 ... 17 18
DW
Block 2
Bit No.
1
...
...
31 32
12
20
"557"
ACL
MFC
UID
Allocation class as defined in ISO/IEC 15963-1 = E0h
Manufacturer code of Atmel Corporation as defined in ISO/IEC 7816-6 = 15h
UID issuer identifier on request (respectively 5 bit CID and 3 bit ICR)
Customer ID on request
CID
ICR
IC revision
LotID
5-digit lot number, e.g., “41557”
Wafer#
DW
5 bits for wafer#
15 bits encoded as sequential die on wafer number
4. Operating the ATA5567
4.1
Initialization and POR Delay
The Power-On-Reset (POR) circuit remains active until an adequate voltage threshold has been
reached. This threshold will be reached also if the coil voltage ramps up in terms of a few volts
per second. It means that the tag can be moved slowly towards the reader without performance
loss. This in turn triggers the default start-up delay sequence. During this configuration period of
about 192 field clocks, the ATA5567 is initialized with the configuration data stored in EEPROM
block 0. During initialization of the configuration block 0, for all ATA55670x variants the load
damping is active permanently (see Figure 4-5 on page 10). The ATA55671x types (without
damping option) achieve a longer read range based on the lower activation field strength.
If the POR-delay bit is reset, no additional delay is observed after the configuration period. Tag
modulation in regular-read mode will be observed about 3 ms after entering the RF field. If the
POR delay bit is set, the ATA5567 remains in a permanent damping state until 8190 internal
field clocks have elapsed.
T
INIT = (192 + 8190 × POR delay) × TC ≈ 67 ms; TC = 8 µs at 125 kHz
Any field gap occurring during this initialization phase will restart the complete sequence. After
this initialization time the ATA5567 enters regular-read mode and modulation starts automati-
cally using the parameters defined in the configuration register.
6
ATA5567
4874F–RFID–07/08