ATA5570 ATMEL Corporation, ATA5570 Datasheet - Page 18

• Manufacturer Part Number: ATA5570
• Description: Multifunctional 330-bit Read/write RF Sensor Identification IC
• Manufacturer: ATMEL Corporation

7.3
Figure 7-2.
18
Block-read mode
Regular-read mode
Sequence Start Marker
ATA5570 [Preliminary]
ATA5570 Sequence Start Marker in Extended Mode
Sequence Start Marker
10
10
Table 7-1.
The ATA5570 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 header before the first block to be transmitted if the bit 29 in extended mode is set. At
the start of a new block sequence, the value of the two bits is inverted.
Mode
FSK1
FSK2
PSK1
PSK2
PSK3
Manchester
Bi-phase 1 (’50)
Bi-phase 2 (’57)
NRZ
Notes:
(1)
(1)
(2)
(2)
(2)
Block n
Block 1
1. A common multiple of bit rate and FSK frequencies is recommended.
2. In PSK mode the selected data rate has to be an integer multiple of the PSK sub-carrier
frequency.
ATA5570 Types of Modulation in Extended Mode and Sensor Input R
Typical
01
Direct Data Output Encoding
FSK/5, FSK/8;
“0” = RF/5; “1” = RF/8
FSK/10, FSK/8;
“0” = RF/10; “1” = RF/8
Phase change when input changes
Phase change on bit clock if input high
Phase change on rising edge of input
“0” = falling edge
“1” = rising edge on mid-bit
“1” creates an additional mid-bit change “0” creates an additional mid-bit change
“0” creates an additional mid-bit change “1” creates an additional mid-bit change
“1” = damping on, “0” = damping off
Block 2
Block n
MAXBLK
10
Block n
01
Block 1
01
Inverse Data Output Encoding
FSK/8, FSK/5;
“0” = RF/8; “1” = RF/5 (= FSK1a)
FSK/8, FSK/10;
“0” = RF/8; “1” = RF/10 (= FSK2a)
Phase change when input changes
Phase change on bit clock if input low
Phase change on falling edge of input
“1” = falling edge
“0” = rising edge on mid-bit
“0” = damping on, “1” = damping off
Block n
Block 2
10
MAXBLK
Block n
4863A–RFID–07/05
S
< 100 k
10
01