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 17 of 39
NXP Semiconductors
MF1S50yyX
MIFARE Classic 1K - Mainstream contactless smart card IC
9.4 ATQA and SAK responses
For details on the type identification procedure please refer to Ref. 2.
The MF1S50yyX answers to a REQA or WUPA command with the ATQA value shown in
Table 11
and to a Select CL1 command (CL2 for the 7-byte UID variant) with the SAK
value shown in Table 12
.
Remark: The ATQA coding in bits 7 and 8 indicate the UID size according to
ISO/IEC 14443 independent from the settings of the UID usage.
Remark: The bit numbering in the ISO/IEC 14443 starts with LSBit = bit 1, but not LSBit =
bit 0. So one byte counts bit 1 to 8 instead of bit 0 to 7.
Table 11. ATQA response of the MF1S50yyX
Bit Number
Sales Type Hex Value 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
MF1S500yX 00 44h 0000000001000100
MF1S503yX 00 04h 0000000000000100
Table 12. SAK response of the MF1S50yyX
Bit Number
Sales Type Hex Value 8 7 6 5 4 3 2 1
MF1S50yyX 08h 00001000