ATA555812C-DDB Atmel, ATA555812C-DDB Datasheet - Page 7

• Manufacturer Part Number: ATA555812C-DDB
• Description: IC IDIC 1KBIT R/W DIE
• Manufacturer: Atmel

Specifications of ATA555812C-DDB

• Function: Read/Write
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2-6.
2.7.2
4681E–RFID–11/09
Lock Bit
L
P x a
0
1
0
1
MSB.............
Page Security Register
31 30 29 28
Code
P x b
0
0
1
1
Password required for
reserved
27 26 25 24
write
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
yes
yes
no
reserved
reserved
23 22 21 20
read
yes
no
no
Password - Read
Read Access
Password - Write
System Memory Access
Page Security
Configuration
Traceability 3
Traceability 2
Traceability 1
Tag ID 3
Tag ID 2
Tag ID 1
19 18 17 16
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
P4b
P3a
7 6 5 4
P3b
P2a
P2b
Password Access
Unlimited Access
P1a P1b P0a
...........LSB
3 2 1 0
Block Name
Block Name
Block Name
No Access
Figure 2-3 on page
P0b
Page 0
Page 1
Page 2
Page 3
ATA5558
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