Data Sheet

MFRC522 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.9 — 27 April 2016
112139 22 of 95
NXP Semiconductors
MFRC522
Standard performance MIFARE and NTAG frontend
Fig 19. I
2
C-bus HS mode protocol frame
msc618
8-bit master code 0000 1xxx
A
t
H
t
1
S
F/S mode
HS mode
If P then
F/S mode
If Sr (dotted lines)
then HS mode
16789 67891
1 2 to 5
2 to 5
2 to 5
67 89
SDA high
SCL high
SDA high
SCL high
t
H
t
FS
Sr Sr P
n + (8-bit data + A/A)
7-bit SLA
R/W A
= Master current source pull-up
= Resistor pull-up