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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
97 of 172
There are 3 possible configurations for the NFC-WI Secure Element:
• Off mode
is used when no communication with the Secure Element is needed, either
from the host controller or from an external PCD.
Fig 59. NFC-WI Off Mode
• Wired mode
is used to communicate with the Secure Element internally.
No RF field is emitted. In this mode, PN544 acts as PCD to access to the Secure
Element through the related RF reader gate.
Type X
Reader
application
Reader
application
gate
Secure Element
I2C or SPI or HSU
HOST
NFC-WI
PN544
antenna
NFC-WI
Wired mode
RF
Technology
(type X)
Reader
RF gate
Fig 60. NFC-WI Wired Mode
Note:
As soon as NFC-WI is set in WIRED mode, no external tag (through RF) can be
detected. Only communication with SE is allowed through the related RF gate.