T555711-DDW Atmel, T555711-DDW Datasheet - Page 11

• Manufacturer Part Number: T555711-DDW
• Description: IC IDIC R/W RFID 330BIT ON-CHIP
• Manufacturer: Atmel
• Series: T555711r

Specifications of T555711-DDW

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: 330-bit EEPROM
• Package / Case: DICE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4.10
Table 4-2.
Figure 4-7.
Figure 4-8.
4517J–RFID–03/06
PWD
1
1
0
Answer-On-Request (AOR) Mode
AOR
Write data to tag
V
--
1
0
Coil1 - Coil2
V
Coil 1 - Coil 2
T5557 — Modes of Operation
Answer-On-Request (AOR) Mode
Coil Voltage after Programming of a Memory Block
T55571x
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
POR
When the AOR bit is set, the T5557 does not start modulation in the regular-read mode after
loading configuration block 0. The tag waits for a valid AOR data stream (“wake-up command”)
from the reader before modulation is enabled. The wake-up command consists of the opcode
(“10”) followed by a valid password. The selected tag will remain active until the RF field is
turned off or a new command with a different password is transmitted which may address
another tag in the RF field.
Loading block 0
T55570x
Programming and
data verification
5.6 ms
No modulation
because AOR = 1
(Block-read mode)
Read programmed
memory block
AOR wake-up command (with valid PWD)
De-activate Function
Command with non-matching password
deactivates the selected tag
POR/
single
or
gap
Modulation
Read block 1..MAXBLK
(Regular-read mode)
T5557
11