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 170 of 222
NXP Semiconductors
PN532/C1
Near Field Communication (NFC) controller
8.6.23.30 CIU_TypeB register (630Eh)
Selects the specific settings for the ISO/IEC 14443B
Table 232. CIU_TypeB register (address 630Eh) bit allocation
Bit 7 6 5 4 3 2 1 0
Symbol Rx
SOFReq
Rx
EOFReq
-EOFSOF
Width
NoTx
SOF
NoTx
EOF
TxEGT[1:0]
Reset 0000 0 000
Access R/W R/W R R/W R/W R/W R/W R/W
Table 233. Description of CIU_TypeB bits
Bit Symbol Description
7 RxSOFReq If this bit is set to logic 1, the SOF is required. A datastream starting
without SOF is ignored.
If this bit is set to logic 0, a datastream with and without SOF is accepted.
The SOF will be removed and not written into the FIFO.
6 RxEOFReq If this bit is set to logic 1, the EOF is required. A datastream ending
without EOF will generate a protocol error: ProtocollErr in the CIU_Error
register will be set to logic 1.
If this bit is set to logic 0, a datastream with and without EOF is accepted.
The EOF will be removed and not written into the FIFO.
5 - Reserved.
4 EOFSOFWidth If this bit is set to logic 1, the SOF and EOF will have the maximum length
defined in the ISO/IEC 14443B.
If this bit is set to logic 0, the SOF and EOF will have the minimum length
defined in the ISO/IEC 14443B.
3 NoTxSOF If this bit is set to logic 1, the generation of the SOF is suppressed.
2 NoTxEOF If this bit is set to logic 1, the generation of the EOF is suppressed.
1 to 0 TxEGT[1:0] These bits define the length of the EGT, as defined in the
ISO/IEC 14443B
Value Description
00 0 bit
01 1 bit
10 2 bits
11 3 bits