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MFRC522 데이터시트(PDF) 36 Page - NXP Semiconductors

부품명 MFRC522
상세설명  Contactless reader IC
PDF  96 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

MFRC522 데이터시트(HTML) 36 Page - NXP Semiconductors

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MFRC522_33
© NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3 — 26 October 2009
112133
36 of 96
NXP Semiconductors
MFRC522
Contactless reader IC
9.3 Register descriptions
9.3.1 Page 0: Command and status
9.3.1.1
Reserved register 00h
Functionality is reserved for future use.
9.3.1.2
CommandReg register
Starts and stops command execution.
9.3.1.3
ComIEnReg register
Control bits to enable and disable the passing of interrupt requests.
Table 21.
Reserved register (address 00h); reset value: 00h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
reserved
Access
-
Table 22.
Reserved register bit descriptions
Bit
Symbol
Description
7 to 0
-
reserved
Table 23.
CommandReg register (address 01h); reset value: 20h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol:
reserved
RcvOff
PowerDown
Command[3:0]
Access:
-
R/W
D
D
Table 24.
CommandReg register bit descriptions
Bit
Symbol
Value Description
7 to 6 reserved
-
reserved for future use
5
RcvOff
1
analog part of the receiver is switched off
4
PowerDown
1
Soft power-down mode entered
0
MFRC522 starts the wake up procedure during which this bit is
read as a logic 1; it is read as a logic 0 when the MFRC522 is
ready; see Section 8.6.2 on page 31
Remark: The PowerDown bit cannot be set when the SoftReset
command is activated
3 to 0 Command[3:0] -
activates a command based on the Command value; reading this
register shows which command is executed; see Section 10.3 on
page 67
Table 25.
ComIEnReg register (address 02h); reset value: 80h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
IRqInv
TxIEn
RxIEn
IdleIEn
HiAlertIEn
LoAlertIEn
ErrIEn
TimerIEn
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W



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