mfrc52301hn1-trayb NXP Semiconductors, mfrc52301hn1-trayb Datasheet - Page 24
mfrc52301hn1-trayb
Manufacturer Part Number
mfrc52301hn1-trayb
Description
Contactless Reader Ic
Manufacturer
NXP Semiconductors
Datasheet
1.MFRC52301HN1-TRAYB.pdf
(98 pages)
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NXP Semiconductors
Table 15.
[1]
MFRC523_33
Product data sheet
PUBLIC
Bit
Tx1RFEn
0
1
X = Do not care.
Register and bit settings controlling the signal on pin TX1
Bit
Force
100ASK
X
0
0
1
[1]
8.4.1 General
8.4.2 TX p-driver
8.4 Analog interface and contactless UART
Bit
InvTx1RFOn
X
0
1
1
[1]
The integrated contactless UART supports the external host online with framing and error
checking of the protocol requirements up to 848 kBd. An external circuit can be connected
to the communication interface pins MFIN and MFOUT to modulate and demodulate the
data.
The contactless UART handles the protocol requirements for the communication
protocols in cooperation with the host. Protocol handling generates bit and byte-oriented
framing. In addition, it handles error detection such as parity and CRC, based on the
various supported contactless communication protocols.
Remark: The size and tuning of the antenna and the power supply voltage have an
important impact on the achievable operating distance.
The signal on pins TX1 and TX2 is the 13.56 MHz energy carrier modulated by an
envelope signal. It can be used to drive an antenna directly using a few passive
components for matching and filtering; see
and TX2 can be configured using the TxControlReg register; see
page
The modulation index can be set by adjusting the impedance of the drivers. The
impedance of the p-driver can be configured using registers CWGsPReg and
ModGsPReg. The impedance of the n-driver can be configured using the GsNReg
register. The modulation index also depends on the antenna design and tuning.
The TxModeReg and TxSelReg registers control the data rate and framing during
transmission and the antenna driver setting to support the different requirements at the
different modes and transfer speeds.
49.
Bit
InvTx1RFOff
X
X
X
X
[1]
[1]
[1]
[1]
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 5 March 2010
Envelope Pin
X
0
1
0
1
0
1
[1]
115233
TX1
X
RF
RF
RF
RF
0
RF_n pCW
[1]
Section 15 on page
GSPMos
X
pMod
pCW
pMod
pCW
pMod
[1]
nMod
GSNMos Remarks
X
nMod
nCW
nMod
nCW
nCW
[1]
79. The signal on pins TX1
Section 9.2.2.5 on
not specified if RF is
switched off
100 % ASK: pin TX1
pulled to logic 0,
independent of the
InvTx1RFOff bit
Contactless reader IC
MFRC523
© NXP B.V. 2010. All rights reserved.
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