T555401N-DDW Atmel, T555401N-DDW Datasheet - Page 9

• Manufacturer Part Number: T555401N-DDW
• Manufacturer: Atmel

Specifications of T555401N-DDW

• Screening Level: Industrial
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Figure 4-5.
4.6
4.7
4.8
4.9
4.10
4576D–RFID–12/06
Maxblock Feature
Terminators
Direct Access
Modulation and Bitrate
Answer-On-Request Mode (AOR)
MAXBLK = 2
MAXBLK = 5
MAXBLK = 0
MAXBLK Examples
If it is not necessary to read all user data blocks, the MAXBLK field in block 0 can be used to limit
the number of blocks read. For example, if MAXBLK = 5, the T5554 repeatedly reads and trans-
mits only blocks 1 to 5 (see
transmitted) can be read.
The terminators are (optionally selectable) special damping patterns, which may be used to syn-
chronize the reader. There are two types available; a block terminator which precedes every
block, and a sequence terminator which always follows the last block.
The sequence terminator consists of two consecutive block terminators. The terminators may be
individually enabled with the mode bits ST (Sequence Terminator enable) or BT (Block Termina-
tor enable).
Note:
The direct access command allows the reading of an individual block by sending the OP-code
(“10”), the lock-bit and the 3-bit address.
Note:
There are two modulator stages in the T5554 (see
selected using the appropriate bits in block 0 (MS1[1:0] and MS[2:0]). Also the bitrate can be
selected using BR[2:0] in block 0. These options are described in detail in
through
When the AOR bit is set, the IDIC does not start modulation after loading configuration block 0.
It waits for a valid AOR data stream (wake-up command) from the reader before modulation is
enabled.
The wake-up command consists of the OP-code (“10”) following by a valid password. The IC will
remain active until the RF field is turned off or a stop OP-code is received.
Loading block 0
Loading block 0
Loading block 0
It is not possible to include a sequence terminator in a transmission where MAXBLK = 0.
PWD has to be 0.
Figure 5-10 on page
0
0
0
Block 1
Block 1
Block 0
Block 4
Block 2
Block 0
Figure
22.
4-5). If MAXBLK is set to “0”, block 0 (which is normally not
Block 5
Block 1
Block 0
Figure 3-2 on page
Block 1
Block 2
Block 0
Block 2
Block 1
Block 0
4) whose mode can be
Figure 5-5 on page 17
T5554
9