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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
129 of 172
9.13 Reader RF gates – additional commands
PN544 implement reader feature defined in ETSI HCI specification. However, it provides
the following additional commands:
Table 121. Reader RF Additional Commands
Value Command
Description
’30’
NXP_WR_PRESCHECK
The host sends this command to check the
remote card is still present in the field.
The response to this command indicates the
result of the Presence Check procedure. This
command is only valid for ISO14443-4
compliant card, otherwise error
ANY_E_CMD_NOT_SUPPORTED is returned
as response.
’31’
NXP_WR_ACTIVATE_NEXT
The host sends this command to activate next
remote card (in case of several cards in the
field).
The response to this command indicates the
result of the activation procedure of next card
(when the response is sent, next remote card
has been activated). Parameter in the response
indicates if there is still other cards in the field
(previous activated cards will not be visible). By
successive use of this command, host is able
to successively activate all cards within a
technology. If this command is sent when no
more other card is present in the field (no
collision detected) this command will return an
error.
’32’
NXP_WR_ACTIVATE_ID
The host sends this command to select a
previously detected remote card (by means of
NXP_WR_ACTIVATE_NEXT
command) using
the ID of the card.
’33’
NXP_WR_DISPATCH_TO_UICC
The host sends this command to dispatch the
remote card to the UICC (reactivation of the
card is implicitly done before the dispatch). The
response to this command indicates the result
of the dispatch procedure. After this command
has been processed, no card is activated, if the
host wants to use a card (e.g. for presence
check purpose) it need to reactivate it via
NXP_WR_ACTIVATE_ID
command
.