User's Manual

Table Of Contents
U
M10936
P
N7150 User Manual
UM
10936 All information provided in this document is subject to legal disclaimers.
U
ser manual
CO
MPANY PUBLIC
Rev. 2.06 November 2020
348120
80 of 127
NFC-A
NFC-B
Wait phase (no Listen)
Polling phase
F
ig 41. RF Discovery sequence in case of EMVCo profile
I
f there is a card detected in the field, then the polling sequence is modified by the PN7150,
in order to look for another potential card in the field.
This is illustrated by the 2 figures below:
On the 1
st
o
ne, there is no card in the RF Field, so PN7150 keeps polling by
alternating WUPA & WUPB commands.
WUPA WUPB
No NFC-A Card
=> no response
No NFC-B Card
=> no response
WUPA WUPB
No NFC-A Card
=> no response
No NFC-B Card
=> no response
NFCC = PCD
Fig 42. EMVCo polling without a card in the field
O
n the 2
n
d
o
ne, an NFC-A card is placed in the RF Field. The PN7150 detects it,
activates it and puts it in HALT state and then looks for a potential NFC-B card in
the field. Since there is no NFC-B card in the field, the PN7150 activates the
NFC-A card again, then the PN7150 activates the ISO-DEP interface and the DH
can start to exchange data with the NFC-A card to proceed with the payment
application.