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 42 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
8.2.2.7 TxSelReg
Selects the sources for the analog part.
Table 59. TxSelReg register (address 16h); reset value: 10h, 00010000b
7 6 5 4 3 2 1 0
0 0 DriverSel SigOutSel
Access
Rights
RFU RFU r/w r/w r/w r/w r/w r/w
Table 60. Description of TxSelReg bits
Bit Symbol Description
7 to 6 - Reserved for future use.
5 to 4 DriverSel Selects the input of driver Tx1 and Tx2.
Value Description
00 Tristate
Note: In soft power down the drivers are only in Tristate mode
if DriverSel is set to Tristate mode.
01 Modulation signal (envelope) from the internal coder
10 Modulation signal (envelope) from SIGIN
11 HIGH
Note: The HIGH level depends on the setting of InvTx1RFOn/
InvTx1RFOff and InvTx2RFOn/InvTx2RFOff.