MFRC52201HN1/TRAYBM_10 查看數據表（PDF） - NXP Semiconductors.

零件编号

产品描述 (功能)

生产厂家

MFRC52201HN1/TRAYBM_10

Contactless reader IC

NXP Semiconductors. 

NXP Semiconductors

MFRC522

Contactless reader IC

8.2 Analog interface and contactless UART

8.2.1 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 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.

8.2.2 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 78. The signal on pins TX1

and TX2 can be configured using the TxControlReg register; see Section 9.3.2.5 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.

Table 15. Register and bit settings controlling the signal on pin TX1

Bit

Bit

Bit

Bit

Envelope Pin

Tx1RFEn Force InvTx1RFOn InvTx1RFOff

TX1

100ASK

GSPMos GSNMos Remarks

0

X[1]

X[1]

X[1]

X[1]

X[1] X[1]

X[1]

not specified if RF is

switched off

1

0

0

0

1

X[1]

0

RF pMod

nMod

100 % ASK: pin TX1

1

RF pCW

nCW

pulled to logic 0,

independent of the

X[1]

0

RF pMod

nMod

InvTx1RFOff bit

1

RF pCW

nCW

1

1

X[1]

0

0

pMod

nMod

1

RF_n pCW

nCW

[1] X = Do not care.

MFRC522_34

Product data sheet

PUBLIC

All information provided in this document is subject to legal disclaimers.

Rev. 3.4 — 5 March 2010

112134

© NXP B.V. 2010. All rights reserved.

23 of 96

Share Link: