
NXP Semiconductors
UM191812
PN544 C2 User Manual
191812
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
User Manual
Rev. 1.2 — 2010-06-16
10 of 172
6.2 SPI interface
The PN544 is a slave SPI.., The mode used for the clock can be chosen for the phase
(CPHA) and the polarity (CPOL). The pin
IFSEL0
is used to set
CPHA
and
IFSEL1
is
used to set
CPOL
.
(See Table 3 for
CPHA
&
CPOL
settings).
How to configure SPI interface:
SPI Interface Configuration
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF1
MOSI
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF2
SCK
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF0
NSS
IF3
MISO
IFSEL0
IFSEL1
IFSEL2
1
CPOL
CPHA
Fig 2. SPI interface configuration