MFRC52201HN1 NXP Semiconductors, MFRC52201HN1 Datasheet - Page 18

• 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
8.1.4.5 7-Bit addressing
8.1.4.6 Register write access
During the I
determine which slave will be selected by the master.
Several address numbers are reserved. During device configuration, the designer must
ensure that collisions with these reserved addresses cannot occur. Check the I
specification for a complete list of reserved addresses.
The I
after releasing pin NRSTPD or after a power-on reset, the device defines the I
address according to pin EA.
If pin EA is set LOW, the upper 4 bits of the device bus address are reserved by
NXP Semiconductors and set to 0101b for all MFRC522 devices. The remaining 3 bits
(ADR_0, ADR_1, ADR_2) of the slave address can be freely configured by the customer
to prevent collisions with other I
If pin EA is set HIGH, ADR_0 to ADR_5 can be completely specified at the external pins
according to
In both modes, the external address coding is latched immediately after releasing the
reset condition. Further changes at the used pins are not taken into consideration.
Depending on the external wiring, the I
outputs.
To write data from the host controller using the I
MFRC522 the following frame format must be used.
In one frame all data bytes are written to the same register address. This enables fast
FIFO buffer access. The Read/Write (R/W) bit is set to logic 0.
Fig 16. First byte following the START procedure
•
•
The first byte of a frame indicates the device address according to the I
The second byte indicates the register address followed by up to n-data bytes.
2
C-bus address specification is dependent on the definition of pin EA. Immediately
2
C-bus address procedure, the first byte after the START condition is used to
Table 5 on page
MSB
bit 6
Rev. 3 — 26 October 2009
bit 5
8. ADR_6 is always set to logic 0.
112133
2
C-bus devices.
bit 4
slave address
2
bit 3
C-bus address pins can be used for test signal
bit 2
2
C-bus to a specific register in the
bit 1
bit 0
Contactless reader IC
001aak591
R/W
LSB
MFRC522
© NXP B.V. 2009. All rights reserved.
2
C-bus rules.
2
2
C-bus
C-bus
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