TK5561A-PP Atmel, TK5561A-PP Datasheet - Page 7

• Manufacturer Part Number: TK5561A-PP
• Description: IC TRANSPONDR CRYPTO SHORT CYCLE
• Manufacturer: Atmel
• Series: TK5561r

Specifications of TK5561A-PP

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: 320-bit EEPROM
• Package / Case: Plastic Package - 12mm L x 6mm W x 3mm H
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

8. Writing Data into the TK5561A-PP
Figure 8-1.
9. Writing Data Decoding
4682D–RFID–09/06
RF Field
Read Mode
Write Protocol to Program the EEPROM
A write sequence of the TK5561A-PP is shown in
occurs by interrupting the RF field with short gaps. After the start gap the write opcode (10) is
transmitted. The next 32 bits contain the actual data. The last 4 bits denote the destination block
address. If the correct number of bits have been received, the actual data is programmed into
the specified memory block.
The time elapsing between two detected gaps is used to encode the information. As soon as a
gap is detected, a counter starts counting the number of field clock cycles until the next gap is
detected. Depending on how many field clocks elapse, the data is regarded as 0 or 1. The
required number of field clocks is shown in
counted clock periods is between 16 and 31, for a valid 1 it is 48 or 63 respectively. Any other
value being detected results in an error and the device exits write mode and returns to read
mode.
Figure 9-1.
Field Clock Cycles
Write Data Decoder
Standard Op-code
Start Gap
1
0
Write Data Decoding Scheme
Write Mode
1
fail
16
32 bit
0
Figure
32
Address Bits (e.g. block 2)
0
Figure
fail
9-1. A valid 0 is assumed if the number of
1
8-1. Writing data into the transponder
48
0
1
0
TK5561A-PP
64
writing done
> 64 clocks
EOT
7