MFRC522_10 Datasheet, PDF (48/96 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
MFRC522
Contactless reader IC
Table 60. RxModeReg register bit descriptions …continued
Bit Symbol
Value Description
2
RxMultiple
0
receiver is deactivated after receiving a data frame
1
able to receive more than one data frame
only valid for data rates above 106 kBd in order to handle the
polling command
after setting this bit the Receive and Transceive commands will
not terminate automatically. Multiple reception can only be
deactivated by writing any command (except the Receive
command) to the CommandReg register, or by the host clearing
the bit
if set to logic 1, an error byte is added to the FIFO buffer at the
end of a received data stream which is a copy of the ErrorReg
register value
1 to 0 reserved
-
reserved for future use
9.3.2.5 TxControlReg register
Controls the logical behavior of the antenna driver pins TX1 and TX2.
Table 61. TxControlReg register (address 14h); reset value: 80h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol InvTx2RF InvTx1RF InvTx2RF InvTx1RF Tx2CW reserved Tx2RFEn Tx1RFEn
On
On
Off
Off
Access R/W
R/W
R/W
R/W
R/W
-
R/W
R/W
Table 62. TxControlReg register bit descriptions
Bit Symbol
Value Description
7 InvTx2RFOn 1
output signal on pin TX2 inverted when driver TX2 is enabled
6 InvTx1RFOn 1
output signal on pin TX1 inverted when driver TX1 is enabled
5 InvTx2RFOff 1
output signal on pin TX2 inverted when driver TX2 is disabled
4 InvTx1RFOff 1
output signal on pin TX1 inverted when driver TX1 is disabled
3 Tx2CW
1
output signal on pin TX2 continuously delivers the unmodulated
13.56 MHz energy carrier
0
Tx2CW bit is enabled to modulate the 13.56 MHz energy carrier
2 reserved -
reserved for future use
1 Tx2RFEn 1
output signal on pin TX2 delivers the 13.56 MHz energy carrier
modulated by the transmission data
0 Tx1RFEn 1
output signal on pin TX1 delivers the 13.56 MHz energy carrier
modulated by the transmission data
MFRC522_34
Product data sheet
PUBLIC
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Rev. 3.4 — 5 March 2010
112134
© NXP B.V. 2010. All rights reserved.
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