Product data

MFRC631 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 4 February 2014
227433 87 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
Table 142. TXWaitCtrl bits
Bit Symbol Description
7 TxWaitStart If cleared, the TxWait time is starting at the End of the send data
(TX).
If set, the TxWait time is starting at the End of the received data
(RX).
6 TxWaitEtu If cleared, the TxWait time is TxWait  16/13.56 MHz.
If set, the TxWait time is TxWait  0.5 / DBFreq (DBFreq is the
frequency of the bit stream as defined by TxDataCon).
5 to 3 TxWait High Bit extension of TxWaitLo. TxWaitCtrl bit 5 is MSB.
2 to 0 TxStopBitLength Defines stop-bits and EGT (= stop-bit + extra guard time EGT) to
be send:
0h: no stop-bit, no EGT
1h: 1 stop-bit, no EGT
2h: 1 stop-bit + 1 EGT
3h: 1 stop-bit + 2 EGT
4h: 1 stop-bit + 3 EGT
5h: 1 stop-bit + 4 EGT
6h: 1 stop-bit + 5 EGT
7h: 1 stop-bit + 6 EGT
Note: This is only valid for ISO/IEC14443 Type B