MF0UL1101DUD datasheet(7/50 Pages) NXP

Part #	MF0UL1101DUD

Description	MIFARE Ultralight EV1 - contactless ticket IC

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Product data sheet

COMPANY PUBLIC

Rev. 3.0 — 19 February 2013

234530

7 of 50

NXP Semiconductors

MF0ULx1

MIFARE Ultralight EV1 - contactless ticket IC

8.2 RF interface

The RF-interface is based on the ISO/IEC 14443 Type A standard for contactless smart

cards.

During operation, the reader generates an RF field. This RF field must always be present

(with short pauses for data communication), as it is used for the power supply of the card.

For both directions of data communication, there is one start bit at the beginning of each

frame. Each byte is transmitted with an odd parity bit at the end. The LSB of the byte with

the lowest address of the selected block is transmitted first. The maximum length of a

PCD to PICC frame is 199 bits (20 data bytes + 2 CRC bytes = 20

9 + 29 + 1 start bit).

The maximum length for a fixed size PICC to PCD frame is 307 bits (32 data bytes + 2

CRC bytes = 32

9 + 29 + 1 start bit). The FAST_READ response has a variable frame

length depending on the start and end address parameters. When issuing this command,

take into account the maximum frame length that the PCD supports.

For a multi-byte parameter, the least significant byte is always transmitted first. As an

example, take reading from the memory using the READ command. Byte 0 from the

addressed block is transmitted first after which, byte 1 to byte 3 are transmitted. The same

sequence continues for the next block and all subsequent blocks.

8.3 Data integrity

Following mechanisms are implemented in the contactless communication link between

reader and card to ensure very reliable data transmission:

• 16 bits CRC per block

• parity bits for each byte

• bit count checking

• bit coding to distinguish between “1”, “0” and “no information”

• channel monitoring (protocol sequence and bit stream analysis)

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MF0UL1101DUD Datasheet(PDF) 7 Page - NXP Semiconductors

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