T5557 Datasheet, PDF (10/30 Pages) ATMEL Corporation – Multifunctional 330-bit Read/Write RF-Identification IC

Table 3. T5557 — Modes of Operation
PWD
1
1
0
AOR
1
0
--
Behavior of Tag after Reset Command or POR
Answer-On-Request (AOR) mode:
· Modulation starts after wake-up with a matching password
· Programming needs valid password
Password mode:
· Modulation in regular-read mode starts after reset
· Programming and direct access needs valid password
Normal mode:
· Modulation in regular-read mode starts after reset
· Programming and direct access without password
De-activate Function
Command with non-matching password
deactivates the selected tag
Figure 12. Answer-On-Request (AOR) Mode
T55571x
V_{Coil 1- Coil2}
T555701
Modulation
Loading block 0
POR
No modulation
AOR wake-up command (with valid PWD)
because AOR = 1
Figure 13. Coil Voltage after Programming of a Memory Block
V
Coil 1- Coil 2
Write data to tag
5.6 ms
Programming and
data verification
Read programmed
memory block
(Block-read mode)
POR/
or
single
gap
Read block 1..MAXBLK
(Regular-read mode)
10 T5557
4517E–RFID–02/03