Datasheet

PN512 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 5.2 — 16 June 2016
111352 40 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
8.2.2.5 TxControlReg
Controls the logical behavior of the antenna driver pins Tx1 and Tx2.
1 to 0 RxFraming Defines the expected framing for data reception.
Value Description
00 ISO/IEC 14443A/MIFARE and Passive Communication
mode 106 kbit
01 Active Communication mode
10 FeliCa and Passive Communication mode 212 and 424 kbit
11 ISO/IEC 14443B
Table 54. Description of RxModeReg bits
Bit Symbol Description
Table 55. TxControlReg register (address 14h); reset value: 80h, 10000000b
7 6 5 4 3 2 1 0
InvTx2RF
On
InvTx1RF
On
InvTx2RF
Off
InvTx1RF
Off
Tx2CW CheckRF Tx2RF
En
Tx1RF
En
Access
Rights
r/w r/w r/w r/w r/w w r/w r/w
Table 56. Description of TxControlReg bits
Bit Symbol Description
7 InvTx2RFOn Set to logic 1, the output signal at pin TX2 will be inverted, if driver TX2
is enabled.
6 InvTx1RFOn Set to logic 1, the output signal at pin TX1 will be inverted, if driver TX1
is enabled.
5 InvTx2RFOff Set to logic 1, the output signal at pin TX2 will be inverted, if driver TX2
is disabled.
4 InvTx1RFOff Set to logic 1, the output signal at pin TX1 will be inverted, if driver TX1
is disabled.
3 Tx2CW Set to logic 1, the output signal on pin TX2 will deliver continuously the
un-modulated 13.56 MHz energy carrier.
Set to logic 0, Tx2CW is enabled to modulate the 13.56 MHz energy
carrier.
2 CheckRF Set to logic 1, Tx2RFEn and Tx1RFEn can not be set if an external RF
field is detected. Only valid when using in combination with bit
Tx2RFEn or Tx1RFEn
1 Tx2RFEn Set to logic 1, the output signal on pin TX2 will deliver the 13.56 MHz
energy carrier modulated by the transmission data.
0 Tx1RFEn Set to logic 1, the output signal on pin TX1 will deliver the 13.56 MHz
energy carrier modulated by the transmission data.