Datasheet

PN532_C1 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.6 — 28 November 2017
115436 166 of 222
NXP Semiconductors
PN532/C1
Near Field Communication (NFC) controller
8.6.23.27 CIU_FelNFC2 register (630Bh)
Defines the maximum length of the received frame.
Table 226. CIU_FelNFC2 register (address 630Bh) bit allocation
Bit 7 6 5 4 3 2 1 0
Symbol WaitForSelected ShortTimeSlot DataLenMax[5:0]
Reset 0 0 000000
Access R/W R/W R/W R/W R/W R/W R/W R/W
Table 227. Description of CIU_FelNFC2 bits
Bit Symbol Description
7 WaitForSelected Set to logic 1, the AutoColl command is automatically ended only
when:
1. A valid command has been received after performing a valid
Select procedure according to 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 80C51 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 Active Communication mode at
424 kbit/s.
Set to logic 1 a short time slot is used (half of the timeslot
at 212 kbit/s).
Set to logic 0 a long timeslot is used (equal to the timeslot for
212 kbit/s).
5 to 0 DataLenMax[5:0] These bits define the maximum length of the accepted frame length:
Note: If set to logic 0 the maximum data length is 256 bytes.
This parameter is ignored at 106 kbit/s if the bit DetectSync in register
CIU_Mode is set to logic 0.
If a received frame is larger as the defined DataLenMax value, the
frame will be ignored.
DataLenMax 4 DataPacketLenght