Quickcool Radio modules KEYFOB-MF1K-03ABS-BU Data Sheet

MF1S50YYX

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2011. All rights reserved.

The RF-interface is according to the standard for contactless smart cards 
ISO/IEC 14443A.

For operation, the carrier field from the reader always needs to be present (with short 
pauses when transmitting), as it is used for the power supply of the card.

For both directions of data communication there is only one start bit at the beginning of 
each frame. Each byte is transmitted with a parity bit (odd parity) at the end. The LSB of 
the byte with the lowest address of the selected block is transmitted first. The maximum 
frame length is 163 bits (16 data bytes + 2 CRC bytes = 16 

× 9 + 2 × 9 + 1 start bit).

The 1024 

× 8 bit EEPROM memory is organized in 16 sectors of 4 blocks. One block 

contains 16 bytes.

 

Byte Number within a Block

15

14

13

12

11

10

9

8

7

6

5

Key A

Access Bits

Key B

4

3

2

1

0

Block

3

Sector

15

2

1

0

Description

Sector Trailer 15

Data

Data

Data

Sector Trailer 14

Data

Data

Data

Sector Trailer 0

Data

Data

Manufacturer Block

Sector Trailer 1

Data

Data

Data

3

14

2

1

0

3

1

2

1

0

3

0

2

1

0

:

:

:

:

:

:

Key A

Access Bits

Key B

Key A

Access Bits

Key B

Key A

Access Bits

Manufacturer Data

Key B