MFRC52201HN1 NXP Semiconductors, MFRC52201HN1 Datasheet - Page 68

• Manufacturer Part Number: MFRC52201HN1
• Description: RFID Modules & Development Tools CL READER IC'S
• Manufacturer: NXP Semiconductors

Specifications of MFRC52201HN1

• Data Rate: 3.4 Mbps
• Operating Temperature Range: + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MFRC52201HN1,157

NXP Semiconductors
MFRC522_33
Product data sheet
PUBLIC
10.3.1.1 Idle
10.3.1.2 Mem
10.3.1.3 Generate RandomID
10.3.1.4 CalcCRC
10.3.1.5 Transmit
10.3.1.6 NoCmdChange
10.3.1 MFRC522 command descriptions
Places the MFRC522 in Idle mode. The Idle command also terminates itself.
Transfers 25 bytes from the FIFO buffer to the internal buffer.
To read out the 25 bytes from the internal buffer the Mem command must be started with
an empty FIFO buffer. In this case, the 25 bytes are transferred from the internal buffer to
the FIFO.
During a hard power-down (using pin NRSTPD), the 25 bytes in the internal buffer remain
unchanged and are only lost if the power supply is removed from the MFRC522.
This command automatically terminates when finished and the Idle command becomes
active.
This command generates a 10-byte random number which is initially stored in the internal
buffer. This then overwrites the 10 bytes in the internal 25-byte buffer. This command
automatically terminates when finished and the MFRC522 returns to Idle mode.
The FIFO buffer content is transferred to the CRC coprocessor and the CRC calculation is
started. The calculation result is stored in the CRCResultReg register. The CRC
calculation is not limited to a dedicated number of bytes. The calculation is not stopped
when the FIFO buffer is empty during the data stream. The next byte written to the FIFO
buffer is added to the calculation.
The CRC preset value is controlled by the ModeReg register’s CRCPreset[1:0] bits. The
value is loaded in to the CRC coprocessor when the command starts.
This command must be terminated by writing a command to the CommandReg register,
such as, the Idle command.
If the AutoTestReg register’s SelfTest[3:0] bits are set correctly, the MFRC522 enters Self
Test mode. Starting the CalcCRC command initiates a digital self test. The result of the
self test is written to the FIFO buffer.
The FIFO buffer content is immediately transmitted after starting this command. Before
transmitting the FIFO buffer content, all relevant registers must be set for data
transmission.
This command automatically terminates when the FIFO buffer is empty. It can be
terminated by another command written to the CommandReg register.
This command does not influence any running command in the CommandReg register. It
can be used to manipulate any bit except the CommandReg register Command[3:0] bits,
for example, the RcvOff bit or the PowerDown bit.
Rev. 3 — 26 October 2009
112133
Contactless reader IC
MFRC522
© NXP B.V. 2009. All rights reserved.
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