ata556714n-ddt1 ATMEL Corporation, ata556714n-ddt1 Datasheet - Page 17

• Manufacturer Part Number: ata556714n-ddt1
• Description: Multifunctional 330-bit Read/write Rf Identification Ic
• Manufacturer: ATMEL Corporation

6.3
Figure 6-2.
6.4
4874E–RFID–10/07
Regular read mode
Sequence Start Marker
Inverse Data Output
Block read mode
ATA5567 Sequence Start Marker in Extended Mode
10
The ATA5567 sequence start marker is a special damping pattern, which may be used to syn-
chronize the reader. The sequence start marker consists of two bits (“01” or “10”) which are
inserted as a header before the first block to be transmitted if bit 29 in extended mode is set. At
the start of a new block sequence, the value of the two bits is inverted.
The ATA5567 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.
Sequence Start Marker
10
16). This function is supported for all basic types of encoding.
Data clock
Block n
Block 1
Intern out
data
Data Encoder for Inverse Data Output
01
D
CLK
Block 2
R
Sync
Block n
Inverse data output
MAXBLK
10
XOR
Block n
01
Figure 6-3
Block 1
01
Manchester
Direct/NRZ
Modulator
Biphase
works on inverted data (see
PSK1
PSK2
PSK3
FSK1
FSK2
Block n
Block 2
10
MUX
MAXBLK
Block n
Data output
ATA5567
Table 6-1 on
10
01
17