ATA555812-DDW Atmel, ATA555812-DDW Datasheet - Page 7

• Manufacturer Part Number: ATA555812-DDW
• Manufacturer: Atmel

Specifications of ATA555812-DDW

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

Figure 2-6.
2.7.2
4681C–RFID–09/05
L
Pxa
0
1
0
1
MSB.............
31 30 29 28
Code
Lock Bit
Pxb
0
0
1
1
Page Security Register
Password required for
reserved
27 26 25 24
write
yes
yes
no
To access a protected memory block, a Login command with the corresponding read or write
password had to be executed once per session. During the login procedure the 32-bit password
field of the login command is compared with the contents of the corresponding password in the
system memory. If the passwords match, the ATA5558 tag will return an SOF pattern as an
acknowledge signal. If they do not match, the tag will respond with an SOF followed by the
appropriate error code. Writing to a protected memory address which has not been enabled with
the correct LoginWrite password, will result in an error code on completion of the interrogator
command. Reading a password protected memory address which has not been enabled with
the correct LoginRead password, returns a block of all 0 data and no error code.
Figure 2-5.
Each memory block, consists of 32 data bits and an associated lock bit (see
4). Once a block is locked (lock bit = 1 ), the entire block including the lock bit itself can no longer
be reprogrammed
reserved
reserved
23 22 21 20
read
yes
no
no
System Memory Access
Read Access
Password - Write
Password - Read
Page Security
Configuration
Traceability 3
Traceability 2
Traceability 1
19 18 17 16
Tag ID 3
Tag ID 2
Tag ID 1
Page 7
Page 6
Page 5
Page 4
P7a P7b P6a P6b P5a P5b
15 14 13 12
63
62
61
60
59
58
57
56
55
54
Password - Write
Password - Read
Write Access
Page Security
Configuration
Traceability 3
Traceability 2
Traceability 1
11 10 9 8
Tag ID 3
Tag ID 2
Tag ID 1
Page Security Data
P4a
ATA5558 [Preliminary]
P4b
P3a
7 6 5 4
P3b
Password Access
Unlimited Access
P2a
Block Name
Block Name
Block Name
No Access
P2b
P1a P1b P0a
...........LSB
3 2 1 0
Figure 2-3 on page
P0b
Page 0
Page 1
Page 2
Page 3
7