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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
140 of 172
Type B PCD
This paragraph explains how to realize a PN544 and its host(s) can be a Type B reader.
WARNING:
Type B PCD does not support multiple card detection (Anti-collision not
supported). Thus only one Type B card can be detected by PN544.
9.16.4
Type B PCD over SWP (UICC as a Type B reader)
The UICC can run a Type B reader application, as described in HCI specification.
Refer to paragraph SWP.
9.16.5 Type B PCD over host link (I2C, SPI, HSU) (Host as a Type B reader)
The host processor can run a Type B reader application, as described in HCI
specification.
The method used is fixed in ROM. The method used is the
probabilistic
approach.
9.16.6 Meaning of additional commands of Reader RF gates for Type B
Refer to Reader RF gates additional commands chapter for commands description.
9.16.6.1 Several Type B cards in the RF field: use NXP_WR_ACTIVATE_NEXT
Not Applicable (Type B Anti-collision not supported).
9.16.6.2 Presence check of ISO14443B card: use NXP_WR_PRESCHECK
When the reader wants to check the presence of the ISO14443 card in the field, it shall
send the command NXP_WR_PRESCHECK. In ISO14443, the PN544 will send a
R(NAK) block to the card. It expect R(ACK) or last I block in response, as defined in
ISO14443-4.
9.16.7 Handling of multiple Type B readers
Both the UICC and the host can activate a reader session at the same time.
Note: Refer to ‘
Type A PCD
’ flowcharts to have an overview of system exchanges.
(Same HCI events/registry/commands are required on
Type B Reader RF Gate
)