MFRC522_(2007) 데이터 시트보기 (PDF) - NXP Semiconductors.
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MFRC522_ Datasheet PDF : 109 Pages
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NXP Semiconductors
MFRC522
Contactless Reader IC
Table 46: Description of RxModeReg bits …continued
Bit
Symbol
Description
3
RxNoErr
If set to logic 1, a not valid received data stream (less than 4 bits
received) will be ignored. The receiver will remain active.
2
RxMultiple Set to logic 0, the receiver is deactivated after receiving a data frame.
Set to logic 1, it is possible to receive more than one data frame. This bit
is only valid for data rates above 106 kbit/s to handle the Polling
command. Having set this bit, the receive and transceive commands will
not terminate automatically. In this case the multiple receiving can only
be deactivated by writing any command (except the Receive command)
to the CommandReg register or by clearing the bit by the host.
If set to logic 1, at the end of a received data stream an error byte is
added to the FIFO. The error byte is a copy of the ErrorReg register.
1 to 0 -
Reserved for future use.
9.2.2.5 TxControlReg
Controls the logical behavior of the antenna driver pins Tx1 and Tx2.
Table 47: TxControlReg register (address 14h); reset value: 80h
Bit
7
6
5
4
3
2
Symbol InvTx2RF InvTx1RF InvTx2RF InvTx1RF Tx2CW -
On
On
Off
Off
Access
r/w
r/w
r/w
r/w
r/w RFU
Rights
1
0
Tx2RFEn Tx1RFEn
r/w
r/w
Table 48: 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
-
Reserved for future use.
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.
112132
Product data sheet
Rev. 3.2 — 22 May 2007
© NXP B.V. 2007. All rights reserved.
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