mfrc52301hn1-trayb NXP Semiconductors, mfrc52301hn1-trayb Datasheet - Page 34

• Manufacturer Part Number: mfrc52301hn1-trayb
• Description: Contactless Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
9. MFRC523 registers
Table 20.
MFRC523_33
Product data sheet
PUBLIC
Address
(hex)
Page 0: Command and status
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
MFRC523 register overview
Register name
Reserved
CommandReg
ComlEnReg
DivlEnReg
ComIrqReg
DivIrqReg
ErrorReg
Status1Reg
Status2Reg
FIFODataReg
FIFOLevelReg
WaterLevelReg
ControlReg
9.1 Register bit behavior
Depending on the functionality of a register, the access conditions to the register can vary.
In principle, bits with same behavior are grouped in common registers. The access
conditions are described in
Table 19.
Abbreviation Behavior
R/W
D
R
W
reserved
RFT
Function
reserved for future use
starts and stops command execution
enable and disable interrupt request control bits
enable and disable interrupt request control bits
interrupt request bits
interrupt request bits
error bits showing the error status of the last command
executed
communication status bits
receiver and transmitter status bits
input and output of 64 byte FIFO buffer
number of bytes stored in the FIFO buffer
level for FIFO underflow and overflow warning
miscellaneous control registers
Behavior of register bits and their designation
read and write These bits can be written and read by the microcontroller. Since
dynamic
read only
write only
-
-
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 5 March 2010
Table
Description
they are used only for control purposes, their content is not
influenced by internal state machines, for example the
ComIEnReg register can be written and read by the
microcontroller. It will also be read by internal state machines but
never changed by them.
These bits can be written and read by the microcontroller.
Nevertheless, they can also be written automatically by internal
state machines, for example the CommandReg register changes
its value automatically after the execution of the command.
These register bits hold values which are determined by internal
states only, for example the CRCReady bit cannot be written
externally but shows internal states.
Reading these register bits always returns zero.
These registers are reserved for future use and must not be
changed. In case of a write access, it is recommended to always
write the value “0”.
These register bits are reserved for future use or are for
production tests and must not be changed.
115233
19.
Refer to
Table 21 on page 37
Table 23 on page 37
Table 25 on page 37
Table 27 on page 38
Table 29 on page 38
Table 31 on page 39
Table 33 on page 40
Table 35 on page 41
Table 37 on page 42
Table 39 on page 43
Table 41 on page 43
Table 43 on page 43
Table 45 on page 44
Contactless reader IC
MFRC523
© NXP B.V. 2010. All rights reserved.
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