Datasheet

MF1S50YYX All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.0 — 2 May 2011
196330 20 of 39
NXP Semiconductors
MF1S50yyX
MIFARE Classic 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.
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.
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)