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 175 of 222
NXP Semiconductors
PN532/C1
Near Field Communication (NFC) controller
8.6.23.36 CIU_RFCfg register (6316h)
Configures the receiver gain and RF level detector sensitivity.
Table 244. CIU_RFCfg register (address 6316h) bit allocation
Bit 7 6 5 4 3 2 1 0
Symbol RFLevelAmp RxGain[2:0] RFLevel[3:0]
Reset 0 1001000
Access R/W R/W R/W R/W R/W R/W R/W R/W
Table 245. Description of CIU_RFCfg bits
Bit Symbol Descrip
tion
7 RFLevelAmp Set to logic 1, this bit activates the RF level detector’s amplifier, see
Section 8.6.8 “RF level detector” on page 116.
6 to 4 RxGain[2:0] This register defines the receivers signal voltage gain factor:
Value
000
001
010
011
100
101
110
111
Description
18 dB
23 dB
18 dB
23 dB
33 dB
38 dB
43 dB
48 dB
3 to 0 RFLevel[3:0] Defines the sensitivity of the RF level detector, for description see Section
8.6.8 “RF level detector” on page 116.