NXP Semiconductors PN544 C2 - Nxp_Evt_Activate_Rdphase

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 90 of 172
9.6.2.6 NXP_EVT_ACTIVATE_RDPHASE, NXP_EVT_DEACTIVATE_RDPHASE ev
ents
These events are only used in case of UICC wants to act as a reader.
When the UICC wants to start a reader RF gate, the PN544 sends a
NXP_EVT_ACTIVATE_RDPHASE to the host.
The host may in response enable the Reader mode by sending the
NXP_PL_RDPHASES.
HOST
PN544
NXP_EVT_ACTIVATE_RDPHASE
Technology = 0x01 = TypeA
UICC
NXP_PL_RDPHASES
EVT_READER_REQUESTED
Polling
Loop
Gate
Polling
Loop
Gate
Type A
Reader
Gate
Type A
Reader
Gate
Polling
Loop
Gate
Polling
Loop
Gate
EVT_TARGET_DISCOVERED
Type A
Reader
Gate
Type A
Reader
Gate
Mandatory
Optional
For Information
(1) Note: In this example there is no reader activated on Host side,
EVT_TARGET_DISCOVERED is sent directly to UICC.
Fig 54. Activate Reader Phase Event (Type A example)
To accept the reader request, when receiving the NXP_EVT_ACTIVATE_RDPHASE
event, the host can check the RF Reader Card technology requested (Technology
parameter). To enable it, the Host must send the NXP_PL_RDPHASES with at least the
technology requested enabled (cf. SWP Management chapter for details on technology
supported over SWP).
To reject the request from the UICC, the host can decide not to send the
NXP_PL_RDPHASES to disable the reader request.
Note: This functionality is mainly for a power consumption management. The host can
decide to enable the reader mode only if enough power is available.