T555711-DDW Atmel, T555711-DDW Datasheet - Page 16

• 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

6.3
Figure 6-2.
6.4
16
Block-read mode
Regular-read mode
Sequence Start Marker
Inverse Data Output
T5557
T5557 Sequence Start Marker in Extended Mode
Sequence Start Marker
10
10
The T5557 sequence start marker is a special damping pattern, which may be used to synchro-
nize the reader. The sequence start marker consists of two bits (“01” or “10”) which are inserted
as header before the first block to be transmitted if the bit 29 in extended mode ist set. At the
start of a new block sequence, the value of the two bits is inverted.
The T5557 supports in its extended mode (X-mode) an inverse data output option. If inverse
data is enabled, the modulator as shown in
page
Figure 6-3.
Data clock
Intern out
15). This function is supported for all basic types of encoding.
Block n
Block 1
data
Data Encoder for Inverse Data Output
D
CLK
01
Block 2
Sync
R
Inverse data output
Block n
MAXBLK
XOR
10
Block n
01
Figure 6-3
Block 1
Direct/NRZ
Modulator
Manchester
Biphase
01
FSK1
FSK2
PSK1
PSK2
PSK3
works on inverted data (see
Block n
Block 2
Mux
10
MAXBLK
Block n
Data output
4517J–RFID–03/06
Table 6-1 on
10
01