參數(shù)資料
型號(hào)： MFRC52301HN1
廠商： NXP Semiconductors N.V.
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Contactless reader IC
封裝： MFRC52301HN1<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html<1<Always Pb-free,;MFRC52301HN1<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html&
文件頁(yè)數(shù)： 23/98頁(yè)
文件大?。?/td> 1666K
代理商： MFRC52301HN1
MFRC523
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.7 — 8 November 2011
115237
23 of 98
NXP Semiconductors
MFRC523
Contactless reader IC
8.4 Analog interface and contactless UART
8.4.1
General
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 manage the protocol requirements for the communication
protocols in cooperation with the host. Protocol handling generates bit and byte-oriented
framing. In addition, it manages 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.
8.4.2
TX p-driver
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
Section 15 on page 79
. The signal on pins TX1
and TX2 can be configured using the TxControlReg register; see
Section 9.2.2.5 on
page 48
.
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.
[1]
X = Do not care.
Table 16.
Bit
Tx1RFEn
Register and bit settings controlling the signal on pin TX1
Bit
Force
100ASK
X
[1]
X
[1]
X
[1]
Bit
InvTx1RFOn
Bit
InvTx1RFOff
Envelope
Pin
TX1
GSPMos
GSNMos
Remarks
0
X
[1]
X
[1]
X
[1]
X
[1]
not specified if RF is
switched off
100 % ASK: pin TX1
pulled to logic 0,
independently of the
InvTx1RFOff bit
1
0
0
X
[1]
0
1
0
1
0
1
RF
RF
RF
RF
0
RF_n
pMod
pCW
pMod
pCW
pMod
pCW
nMod
nCW
nMod
nCW
nMod
nCW
0
1
X
[1]
1
1
X
[1]
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