ata556714n-ddt1 ATMEL Corporation, ata556714n-ddt1 Datasheet - Page 10

• Manufacturer Part Number: ata556714n-ddt1
• Description: Multifunctional 330-bit Read/write Rf Identification Ic
• Manufacturer: ATMEL Corporation

4.8
Figure 4-5.
10
ATA55671x
Write Data Protocol
POR
ATA5567
Block 0
loading
Complete Writing Sequence
ATA556701
The ATA5567 expects to receive a dual bit opcode as the first two bits of a reader command
sequence. There are three valid opcodes:
Writing must follow these rules:
Note:
If the transmitted command sequence is invalid, the ATA5567 enters regular-read mode with the
previously selected page (by former opcode “10” or “11”).
Read mode
• The opcodes “10” and “11” precede all block write and direct access operations for page 0
• The RESET opcode “00” initiates a POR cycle
• The opcode “01” precedes all test mode write operations. Any test mode access is ignored
• Standard write needs the opcode, the lock bit, 32 data bits, and the 3-bit address (38 bits
• Protected write (PWD bit set) requires a valid 32-bit password between the opcode and data
• For the AOR wake-up command, an opcode and a valid password are necessary to select
Start gap
and page 1
after the master key (bits 1 to 4) in block 0 has been set to “6”. Any further modifications of
the master key are prohibited by setting the lock bit of block 0 or the OTP bit
total)
bits or address bits
and activate a specific tag
The data bits are read in the same order as written.
Opcode
Lock bit
Block data
Write mode
Block address
Programming
4874E–RFID–10/07
Read mode