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MFRC522 数据表(PDF) 55 Page - NXP Semiconductors

部件名 MFRC522
功能描述  Contactless reader IC
PDF  96 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

MFRC522 数据表(HTML) 55 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
55 of 96
NXP Semiconductors
MFRC522
Contactless reader IC
9.3.3.3
Reserved register 23h
Functionality is reserved for future use.
9.3.3.4
ModWidthReg register
Sets the modulation width.
9.3.3.5
Reserved register 25h
Functionality is reserved for future use.
Table 91.
Reserved register (address 23h); reset value: 88h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
reserved
Access
-
Table 92.
Reserved register bit descriptions
Bit
Symbol
Description
7 to 0
reserved
reserved for future use
Table 93.
ModWidthReg register (address 24h); reset value: 26h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
ModWidth[7:0]
Access
R/W
Table 94.
ModWidthReg register bit descriptions
Bit
Symbol
Description
7 to 0
ModWidth[7:0] defines the width of the Miller modulation as multiples of the carrier
frequency (ModWidth + 1 / fclk)
the maximum value is half the bit period
Table 95.
Reserved register (address 25h); reset value: 87h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
reserved
Access
-
Table 96.
Reserved register bit descriptions
Bit
Symbol
Description
7 to 0
reserved
reserved for future use



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