Datasheet

NXP Semiconductors
MF0ICU2
MIFARE Ultralight C - Contactless ticket IC
MF0ICU2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved.
Product data sheet Rev. 3.3 — 30 July 2019
COMPANY PUBLIC 137633 24 / 36
PICC ,,ACK''
aaa-013578
CRC
16 Byte ek(RndA || RndB')
PCD Cmd
1642 µs 953 µs
PICC ,,NAK'' NAK
Time out
T
TimeOut
T
NAK
T
ACK
57 µs
CRC00h
8 Byte ek(RndA')
D7 D6 D1... D0
D7 ... D0 D7 ... D0
Figure 16. AUTHENTICATE Step 2
Table 26. AUTHENTICATE part 2 command
Name Code Description Length
Cmd AFh fixed first byte for the
AUTHENTICATE part 2 command
1 byte
ek(RndA || RndB’) - 16-byte encrypted random numbers
RNDA concatenated by RndB’
16 bytes
CRC - CRC according to Ref. 2 2 bytes
00h 00h first response byte indicates that the
authentication process is finished
after this command
1 bytes
ek(RndA’) - 8-byte encrypted, shifted PCD
random number RndA’
8 bytes
NAK see Table 15 see Section 8.3 4-bit
Table 27. AUTHENTICATE part 2 timing
These times exclude the end of communication of the PCD.
T
ACK
min T
ACK
max T
NAK min
T
NAK max
T
TimeOut
AUTHENTICATE part 2 n=9 T
TimeOut
n=9 T
TimeOut
5 ms
10 Limiting values
Stresses exceeding one or more of the limiting values, can cause permanent damage to
the device. Exposure to limiting values for extended periods can affect device reliability.
Table 28. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Min Max Unit
I
I
input current - 30 mA
T
stg
storage temperature -55 +125 °C