mfrc522 NXP Semiconductors, mfrc522 Datasheet - Page 20

• Manufacturer Part Number: mfrc522
• Description: Contactless Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
112132
Product data sheet
9.2.1.9 Status2Reg
Contains status bits of the receiver, transmitter and data mode detector.
Table 23:
Table 24:
Bit
7
6
5 to 4
3
2 to 0
Symbol
Access
Rights
Bit
Symbol
TempSensClear
I
-
MFCrypto1On
Modem State
2
CForceHS
Status2Reg register (address 08h); reset value: 00h
Description of Status2Reg bits
TempSens
Clear
r/w
7
Rev. 3.2 — 22 May 2007
I
2
Description
Set to logic 1, this bit clears the temperature error, if the temperature
is below the alarm limit of 125 °C.
I
Set to logic 1, the I
independent of the I
Set to logic 0, the I
Reserved for future use.
This bit indicates that the MIFARE
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
ModemState shows the state of the transmitter and receiver state
machines.
Status Description
000
001
010
011
100
101
110
CForceHS
2
C input filter settings.
r/w
6
Wait for bit StartSend in register BitFramingReg
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.
Transmitting
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.
Wait for data
Receiving
IDLE
®
Standard cards. This bit shall be cleared by software.
5
RFU
2
2
C input filter is set to the High-speed mode
C input filter is set to the used I
-
2
C protocol.
4
MFCrypto1On
®
dy
Crypto1 unit is switched on and
3
Contactless Reader IC
MFRC522
2
© NXP B.V. 2007. All rights reserved.
Modem State
2
C protocol.
1
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