MFRC52201HN1/TRAYB NXP [NXP Semiconductors], MFRC52201HN1/TRAYB Datasheet - Page 10

• Manufacturer Part Number: MFRC52201HN1/TRAYB
• Description: Contactless reader IC
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
MFRC522_33
Product data sheet
PUBLIC
8.1.2.2 SPI write data
8.1.2.3 SPI address byte
8.1.3.1 Connection to a host
8.1.3 UART interface
To write data to the MFRC522 using SPI requires the byte order shown in
possible to write up to n data bytes by only sending one address byte.
The first send byte defines both the mode and the address byte.
Table 7.
[1]
Remark: The MSB must be sent first.
The address byte must meet the following format.
The MSB of the first byte defines the mode used. To read data from the MFRC522 the
MSB is set to logic 1. To write data to the MFRC522 the MSB must be set to logic 0. Bits 6
to 1 define the address and the LSB is set to logic 0.
Table 8.
Remark: Signals DTRQ and MX can be disabled by clearing TestPinEnReg register’s
RS232LineEn bit.
Line
MOSI
MISO
7 (MSB)
1 = read
0 = write
Fig 8.
X = Do not care.
UART connection to microcontrollers
MOSI and MISO byte order
Address byte 0 register; address MOSI
6
address
Byte 0
address 0
X
[1]
Rev. 3 — 26 October 2009
5
Byte 1
data 0
X
[1]
112133
RX
TX
DTRQ
MX
4
Byte 2
data 1
X
[1]
3
RX
TX
DTRQ
MX
MFRC522
To
...
...
001aak587
2
Byte n
data n
X
[1]
Contactless reader IC
1
MFRC522
© NXP B.V. 2009. All rights reserved.
1
Table
Byte n + 1
data n
X
[1]
0 (LSB)
0
7. It is
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