Product Data Sheet

Product data sheet

COMPANY PUBLIC

Rev. 3.0 — 3 March 2014

279230 20 of 40

NXP Semiconductors

MF1S50yyX/V1

MIFARE Classic EV1 1K - Mainstream contactless smart card IC

10.1.3 Authentication

During the authentication process, 4-byte of the UID are passed on to the MIFARE Classic

Authenticate command of the contactless reader IC. Depending on the activation

sequence, those 4-byte are chosen differently. In general, the input parameter to the

MIFARE Classic Authenticate command is the set of 4 bytes retrieved during the last

cascade level from the ISO/IEC 14443-3 Type A anticollision.

10.2 4-byte UID Operation

All MF1S503yXDyy products are featuring a 4-byte NUID. This 4-byte NUID is stored in

block 0 of sector 0 as shown in Figure 6

10.2.1 Anti-collision and Selection

The anti-collision and selection process for the product variants featuring 4-byte NUIDs is

done according to ISO/IEC 14443-3 Type A using cascade level 1 only.

10.2.2 Authentication

The input parameter to the MIFARE Classic Authenticate command is the full 4-byte UID

retrieved during the anti-collision procedure. This is the same as for the activation

Sequence 3 in the 7-byte UID variant.

11. Load Modulation Strength Option

The MIFARE Classic EV1 1K features the possibility to set the load modulation strength to

high or normal. The default level is set to a high modulation strength and it is

recommended for optimal performance to maintain this level and only switch to the low

load modulation strength if the contactless system requires it.

Remark: The configuration becomes effective only after a PICC unselect or a PICC field

reset. The configuration can be changed multiple times by asserting the command.

Remark: The MIFARE Classic EV1 1K needs to be authenticated to sector 0 with Key A

to perform the SET_MOD_TYPE command. The Access Bits for sector 0 are irrelevant.

Table 15. Available activation sequences for 7-byte UID options

UID Functionality Available Activation Sequences

UIDF0 Sequence 1

UIDF1 Sequence 1, Sequence 2

UIDF2 Sequence 3

UIDF3 Sequence 3

Table 16. Input parameter to MIFARE Classic Authenticate

UID Functionality Input to MIFARE Classic Authenticate Command

Sequence 1 CL2 bytes (UID3...UID6)

Sequence 2 CL1 bytes (CT, UID0...UID2)

Sequence 3 4-byte NUID/RID (UID0...UID3)