ATA556714N-DDB Atmel, ATA556714N-DDB Datasheet - Page 11

• Manufacturer Part Number: ATA556714N-DDB
• Description: IC IDIC R/W 330BIT 75PF
• Manufacturer: Atmel

Specifications of ATA556714N-DDB

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

Figure 4-6.
4.9
4.10
Table 4-2.
4874F–RFID–07/08
PWD
1
1
0
Password
Answer-On-Request (AOR) Mode
AOR
AOR (wake-up command)
Direct access (PWD = 1)
Direct access (PWD = 0)
--
1
0
Page 0/1 regular read
ATA5567 Command Formats
ATA5567 — Modes of Operation
Reset command
Behavior of Tag after Reset Command or POR
Answer-On-Request (AOR) mode:
Password mode:
Normal mode:
Protected write
Standard write
Modulation starts after wake-up with a matching password
Programming needs valid password
Modulation in regular-read mode starts after reset
Programming and direct access needs valid password
Modulation in regular-read mode starts after reset
Programming and direct access without password
When password mode is active (PWD = 1), the first 32 bits after the opcode are regarded as the
password. They are compared bit by bit with the contents of block 7, starting at bit 1. If the com-
parison fails, the ATA5567 will not program the memory, instead it will restart in regular-read
mode once the command transmission is finished.
Note:
Each transmission of the direct access command (two opcode bits, 32-bit password, “0” bit plus
3 address bits = 38 bits) needs about 18 ms. Testing all possible combinations (about 4.3 billion)
would take about two years.
When the AOR bit is set, the ATA5567 does not start modulation in the regular-read mode after
loading configuration block 0. The tag waits for a valid AOR data stream (wake-up command)
from the reader before modulation is enabled. The wake-up command consists of the opcode
(“10”) followed by a valid password. The selected tag will remain active until the RF field is
turned off or a new command with a different password is transmitted which may address
another tag in the RF field.
In password mode, MAXBLK should be set to a value below 7 to prevent the password from being
transmitted by the ATA5567.
1p
1p
1p
1p
1p
OP
10
00
1)
1)
1)
1)
1)
L
1
1
1
0
2
1
Addr
Password
Password
Password
0
Data
32
32
32
1)
32
p = page selector
L
0
1
2
2
Addr
Addr
De-activate Function
Command with non-matching password
deactivates the selected tag
0
0
Data
32
2
Addr
ATA5567
0
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