PN531 NXP Semiconductors, PN531 Datasheet - Page 11

• Manufacturer Part Number: PN531
• Description: ??c Based Transmission Module
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PN531
4.2 NFC MODE
NFC communication differentiates between an active and a passive communication.
N
N
N
N
Active NFC Mode means both the initiator and the target are using their own RF field for the
communication.
Passive NFC Mode means that the target answers to an initiator command in a load modulation scheme.
The initiator is active i.e. generating the RF field.
Initiator: generates RF field @ 13.56 MHz and starts the NFC communication
Target: responds to initiator commands either using load modulation scheme (RF field continuously
generated by Initiator) or using modulation of self generated RF field (no RF field generated by initiator)
Battery
PN531
Figure 4 NFC Mode
Objective Short Form Specification Rev. 2.0 February 2004
11
µC based Transmission module
PN531
Battery
Host