Datasheet

Product data sheet

COMPANY PUBLIC

Rev. 5.2 — 16 June 2016

111352 47 of 137

NXP Semiconductors

PN512

Full NFC Forum-compliant frontend

8.2.2.12 FelNFC2Reg

Defines the maximum length of the received packet.

Table 69. FelNFC2Reg register (address1Bh); reset value: 00h, 00000000b

7 6 5 4 3 2 1 0

WaitForSelected ShortTimeSlot DataLenMax

Access

Rights

r/w r/w r/w r/w r/w r/w r/w r/w

Table 70. Description of FelNFC2Reg bits

Bit Symbol Description

7 WaitForSelected Set to logic 1, the AutoColl command is only terminated

automatically when:

1. A valid command has been received after performing a valid

Select procedure according ISO/IEC 14443A.

2. A valid command has been received after performing a valid

Polling procedure according to the FeliCa specification.

Note: If this bit is set, no active communication is possible.

Note: Setting this bit reduces the host controller interaction in case

of a communication to another device in the same RF field during

Passive Communication mode.

6 ShortTimeSlot Defines the time slot length for Passive Communication mode at

424 kbit. Set to logic 1 a short time slot is used (half of the timeslot

at 212 kbit). Set to logic 0 a long timeslot is used (equal to the

timeslot for 212 kbit).

5 to 0 DataLenMax These bits define the maximum length of the accepted packet

length: DataLenMax * 4  data packet length

Note: If set to logic 0 the maximum data length is 256 bytes.

This parameter is ignored at 106 kbit if the bit DetectSync in

than the defined DataLenMax value, the packet will be ignored.