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NXP Semiconductors
UM191812
PN544 C2 User Manual
191812
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© NXP B.V. 2010. All rights reserved.
User Manual
Rev. 1.2 — 2010-06-16
11 of 172
6.3 I
2
C interface
The PN544 is an I
2
C slave.
To use this interface, an I
2
C address has to be set. The default address of the device is
set to binary “0 1 0 1 0 IF1 IF0”. The prefix “0 1 0 1 0” is a fixed value inside PN544.
How to configure I
2
C interface:
I2C Interface Configuration
IF0
ADDR0
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF1
ADDR1
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF2
SDA
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF3
SCL
IFSEL0
IFSEL1
IFSEL2
0
1
0
2)
Fig 3. I2C interface configuration