mfrc522 NXP Semiconductors, mfrc522 Datasheet - Page 56

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

NXP Semiconductors
112132
Product data sheet
10.4.7 Register Write Access
To write data from the host controller via I
following frame format shall be used.
The first byte of a frame indicates the device address according to the I
second byte indicates the register address followed by up to n-data bytes. In one frame all
n-data bytes are written to the same register address. This enables for example a fast
FIFO access.
The read/write bit shall be set to logic 0.
Fig 16. First byte following the START procedure.
Bit 6
Bit 5
Rev. 3.2 — 22 May 2007
Bit 4
Bit 3
2
C to a specific register of the MFRC522 the
Bit 2
Bit 1
Contactless Reader IC
Bit 0
MFRC522
© NXP B.V. 2007. All rights reserved.
2
C rules. The
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