T555714-DBW Atmel, T555714-DBW Datasheet - Page 6

• Manufacturer Part Number: T555714-DBW
• Description: MODULE IDIC R/W RFID 33OPF
• Manufacturer: Atmel
• Series: T555714r

Specifications of T555714-DBW

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: 330-bit EEPROM
• Package / Case: DICE
• Screening Level: Industrial
• Package Type: Die
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4. Operating the T5557
4.1
4.2
6
Initialization and POR Delay
Tag to Reader Communication
T5557
Figure 3-4.
ACL
MFC
ICR
MSN
LotID
DPW
The Power-On-Reset (POR) circuit remains active until an adequate voltage threshold has been
reached. This in turn triggers the default start-up delay sequence. During this configuration
period of about 192 field clocks, the T5557 is initialized with the configu-ration data stored in
EEPROM block 0. During initialization of the configuration block 0, all T55570x variants the load
damping is active permanently (see
ing 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 T5557 remains in a permanent damping state until 8190 internal field
clocks have elapsed.
T
Any field gap occurring during this initialization phase will restart the complete sequence. After
this initialization time the T5557 enters regular-read mode and modulation starts automatically
using the parameters defined in the configuration register.
During normal operation, the data stored within the EEPROM is cycled and the Coil 1, Coil 2 ter-
minals are load modulated. This resistive load modulation can be detected at the reader module.
INIT
= (192 + 8190 × POR delay) × T
Example:
Block 2
Block 1
Allocation class as defined in ISO/IEC 15963-1 = E0h
Manufacturer code of Atmel Corporation as defined in ISO/IEC 7816-6 = 15h
IC reference of silicon and/or tag manufacturer
Manufacturer serial number consists of:
5-digit lot number, e.g., “38765”
20 bits encoded as sequential die per wafer number (with top 5 bits = wafer#)
T5557 Traceability Data Structure
Top 3 bits define IC revision
Lower 5 bits may contain a customer ID code on request
1
1
' E0 '
' 557 '
ACL
...
LotID
12
...
Figure 4-5 on page
8
C
≈ 67 ms ; T
9
' 15 '
12
MFC
...
13 ...
wafer #
Traceability
C
16 17
= 8 µs at 125 kHz
10). The T55571x types (without damp-
18 19
ICR
' 00 '
...
20
24
die on wafer #
...
25
MSN LotID
' 41 '
...
8
31
4517J–RFID–03/06
32
32