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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
76 of 172
SWP Protected Mode
Protected mode is a feature which intends to be used by the host to block any transaction
between an external RF reader and the UICC. Then receiving the notification of the UICC
activation, the host can authorize UICC access through SWP.
The following flow diagram describes an example of use of this feature:
to enable the protection
EVT_FIELD_ON
RF initialization
EVT_CARD_ACTIVATED
EVT_SEND_DATA
EVT_SEND_DATA
EVT_CARD_DEACTIVATED
EVT_FIELD_OFF
Can be repeated
Card RF
Gate
Card RF
Gate
Card RF
Gate
Card RF
Gate
Card RF
Gate
Card RF
Gate
Card Gate
Card Gate
Card Gate
Card Gate
Card Gate
Card Gate
SWP gate
SWP gate
Preconditions:
- Host has activated UICC with all rights enabled
- UICC has created and opened related CE pipes
EVT_FIELD_ON
RF initialization
Card RF
Gate
Card Gate
to inform about RF transaction
SWP gate
SWP gate
No answer from PN544
Protected mode enabled
Transaction allowed
to disable the protection
SWP gate
SWP gate
RF incoming data are not dispatched
to the UICC as protection is enabled
Data reception
Deselection
to enable the protection
SWP gate
SWP gate
Transaction finished (timeout ?)
Data reception
Fig 45. Protected mode flow example