PN512 NXP Semiconductors, PN512 Datasheet - Page 14

• Manufacturer Part Number: PN512
• Description: Transmission Module
• Manufacturer: NXP Semiconductors

NXP Semiconductors
124533
Product short data sheet
8.2.1 Active Communication mode
Active Communication mode means both the initiator and the target are using their own
RF field to transmit data.
Table 9.
The contactless UART of PN512 and a dedicated host controller are required to handle
the NFCIP-1 protocol.
Note: Transfer Speeds above 424 kbit/s are not defined in the NFCIP-1 standard. The
PN512 supports these transfer speeds only with dedicated external circuits.
Communication
direction
Initiator → Target According to
Target → Initiator
generate RF field
powered to
Fig 9. Active Communication mode
processing
powered for digital
Host
Host
NFC Initiator
NFC Initiator
Communication Overview for Active Communication mode
106 kbit/s
ISO 14443A
100% ASK,
Modified
Miller Coded
Initial Command
Rev. 3.3 — 13 June 2007
1. Initiator starts communication at
selected transfer speed
212 kbit/s
According to FeliCa, 8-30%
ASK Manchester Coded
2. Target answers at the
same transfer speed
Response
424 kbit/s
848 kbit/s
digital capability to handle
this communication
NFC Target
NFC Target
Transmission Module
powered to
generate RF field
© NXP B.V. 2007. All rights reserved.
powered for digital
processing
PN512
1.69 Mbit/s,
3.39 Mbit/s
Host
Host
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