MF1S5009

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© NXP B.V. 2010. All rights reserved.

Product data sheet

PUBLIC

Rev. 3 — 27 July 2010

189131

7 of 32

NXP Semiconductors

MF1S5009

Mainstream contactless smart card IC

9.

Functional description

9.1 Block description

The MF1S5009 chip consists of a 1 kB EEPROM, RF interface and Digital Control Unit.

Energy and data are transferred via an antenna consisting of a coil with a small number of

turns which is directly connected to the MF1S5009. No further external components are

necessary. Refer to the document Ref. 1 for details on antenna design.

– Modulator/demodulator

– Rectifier

– Clock regenerator

– Power-On Reset (POR)

– Voltage regulator

ensures that access to a block is only possible via the two keys specified for each

block

can be incremented and decremented

and encryption of data exchange.

16 bytes. The last block of each sector is called “trailer”, which contains two secret

keys and programmable access conditions for each block in this sector.

9.2 Communication principle

The commands are initiated by the reader and controlled by the Digital Control Unit of the

MF1S5009 according to the access conditions valid for the corresponding sector.

9.2.1 Request standard / all

After Power On Reset (POR) the card answers to a request REQA or wakeup WUPA

command with the answer to request code (see Section 10.4, ATQA according to ISO/IEC

14443A).

9.2.2 Anticollision loop

In the anticollision loop the identifier of a card is read. If there are several cards in the

operating field of the reader, they can be distinguished by their identifier and one can be

selected (select card) for further transactions. The unselected cards return to the idle state

and wait for a new request command.

The anticollision is done with two cascade levels as defined in ISO/IEC 14443-3, see also

Ref. 6.