ATA557001C-DDB Atmel, ATA557001C-DDB Datasheet - Page 11

• Manufacturer Part Number: ATA557001C-DDB
• Description: IC IDIC SENSOR RW 1KBIT DIE
• Manufacturer: Atmel
• Series: -r

Specifications of ATA557001C-DDB

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

Figure 4-6.
4.9
4.10
9191B–RFID–05/11
Password
Answer-on-request (AOR) Mode
Standard write
AOR (wake-up command)
Direct access (PWD = 1)
Direct access (PWD = 0)
Page 0/1 regular read
Reset command
Protected write
Atmel
®
ATA5570 Command Formats
When password mode is active (PWD = 1), the first 32bits 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
comparison fails, the Atmel ATA5570C 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, 32bits password, “0” bit
plus 3 address bits = 38bits) needs about 18ms. Testing all possible combinations (about
4.3billion) would take about two years.
When the AOR bit is set, the Atmel ATA5570C 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 Atmel ATA5570C.
1p*
1p *
1p* L
1p*
1p*
OP
10
00
1
1
1
0
1
2 Addr
Password
Password
Password
0
Data
32
32
32
* p = page selector
32
L
0
2 Addr
1
2 Addr
0
0
Data
Atmel ATA5570C
32
2 Addr
0
11