MFRC522_(2007) 查看數據表（PDF） - NXP Semiconductors.
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MFRC522_ Datasheet PDF : 109 Pages
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NXP Semiconductors
MFRC522
Contactless Reader IC
9.2.1.9 Status2Reg
Contains status bits of the receiver, transmitter and data mode detector.
Table 23: Status2Reg register (address 08h); reset value: 00h
Bit
7
6
5
4
3
Symbol TempSens I2CForceHS
-
MFCrypto1On
Clear
Access
r/w
r/w
RFU
dy
Rights
2
1
0
Modem State
r
Table 24: Description of Status2Reg bits
Bit
Symbol
Description
7
TempSensClear Set to logic 1, this bit clears the temperature error, if the temperature
is below the alarm limit of 125 °C.
6
I2CForceHS
I2C input filter settings.
Set to logic 1, the I2C input filter is set to the High-speed mode
independent of the I2C protocol.
Set to logic 0, the I2C input filter is set to the used I2C protocol.
5 to 4 -
Reserved for future use.
3
MFCrypto1On This bit indicates that the MIFARE® Crypto1 unit is switched on and
therefore all data communication with the card is encrypted.
This bit can only be set to logic 1 by a successful execution of the
MFAuthent Command. This bit is only valid in Reader/Writer mode
for MIFARE® Standard cards. This bit shall be cleared by software.
2 to 0 Modem State
ModemState shows the state of the transmitter and receiver state
machines.
Status Description
000 IDLE
001 Wait for bit StartSend in register BitFramingReg
010 TxWait: Wait until Rf field is present, if the bit TxWaitRF is set
to logic 1. The minimum time for TxWait is defined by the
TxWaitReg register.
011 Transmitting
100 RxWait: Wait until RF field is present, if the bit RxWaitRF is
set to logic 1. The minimum time for RxWait is defined by the
RxWaitReg register.
101 Wait for data
110 Receiving
112132
Product data sheet
Rev. 3.2 — 22 May 2007
© NXP B.V. 2007. All rights reserved.
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