Datasheet

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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 168 of 222
NXP Semiconductors
PN532/C1
Near Field Communication (NFC) controller
8.6.23.29 CIU_ManualRCV register (630Dh)
Allows manual fine tuning of the internal receiver.
IMPORTANT NOTE: For standard application it is not recommended to change this
register settings.
Table 230. CIU_ManualRCV register (address 630Dh) bit allocation
Bit 7 6 5 4 3 2 1 0
Symbol -FastFilt
MF_SO
Delay
MF_SO
ParityDisable LargeBWPLL ManualHPCF HPCF[1:0]
Reset 00 0 0 0 0 00
Access R R/W R/W R/W R/W R/W R/W R/W
Table 231. Description of CIU_ManualRCV bits
Bit Symbol Description
7- Reserved
6 FastFiltMF_SO If this bit is set to logic 1, the internal filter for the Miller-Delay circuit is
set to Fast-Mode
Note: This bit should only be set to logic 1, if the Miller pauses length
expected are less than 400 ns. At 106 kbit/s, the Miller pauses duration
is around 3 s.
5 DelayMF_SO If this bit is set to logic 1, when SigoutSel=1100b (register 6306h), the
Signal at SIGOUT-pin is delayed according the delay defined by
TxBitPhase[6:0] (register 6315h) and TxWait bits (register 630Ch).
Note: In ISO/IEC 14443A/MIFARE Card MIFARE Classic 1K or
MIFARE Clasic 4K card emulation (Virtual Card) mode (DriverSel = 10b
and SigoutSel=1110b), the Signal at SIGIN must then be 128 /fc faster
compared to the ISO/IEC 14443A restrictions on the RF-Field for the
Frame Delay Time.
Note: This delay shall only be activated for setting bits SigOutSel to
(1110b) or (1111b) in register CIU_TxSel.
If this bit is set to logic 0, the SIGOUT-pin delay is not adjustable.
Note: In ISO/IEC 14443A/MIFARE Card MIFARE Classic 1K or
MIFARE Clasic 4K card emulation (Virtual Card) mode (DriverSel = 10b
and SigoutSel=1110b), the ISO/IEC 14443A restrictions on the RF-Field
for the Frame Delay Time should be adjusted on the secure IC side
4 ParityDisable If this bit is set to logic 1, the generation of the Parity bit for transmission
and the parity check for receiving is switched off. The received parity bit
is handled like a data bit.