mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 13

• Manufacturer Part Number: mfrc531
• Description: Iso/iec 14443 Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
9.2.1 Product information field (read only)
9.2.2 Register initialization files (read/write)
Table 12.
Table 13.
[1]
Register initialization from address 10h to address 2Fh is performed automatically during
the initializing phase (see
initialization file.
In addition, the MFRC531 registers can be initialized using values from the register
initialization file when the LoadConfig command is executed (see
page
Byte
15
14
13 to 12 Internal
11 to 8
7 to 5
4 to 0
Definition
Byte
Value
Byte 4 contains the current version number.
86).
Symbol
CRC
RsMaxP
Product Serial Number
reserved
Product Type
Identification
Product information field
Product type identification definition
Product type identification bytes
0
30h
Rev. 3.4 — 26 January 2010
Section 9.7.3 on page
1
FFh
056634
Access Value Description
R
R
R
R
R
R
-
-
-
-
-
-
2
FFh
28) using the StartUp register
the content of the product information field
is secured using a CRC byte which is
checked during start-up
maximum source resistance for the
p-channel driver transistor on pins TX1 and
TX2
The source resistance of the p-channel
driver transistors of pin TX1 and TX2 can be
adjusted using the value GsCfgCW[5:0] in
the CwConductance register (see
Section 9.9.3 on page
of the maximum adjustable source
resistance for pins TX1 and TX2 is stored
as an integer value in Ω in this byte. Typical
values for RsMaxP are between 60 Ω to
140 Ω. This value is denoted as maximum
adjustable source resistance R
is measured by setting the CwConductance
register’s GsCfgCW[5:0] bits to 01h.
two bytes for internal trimming parameters
a unique four byte serial number for the
device
the MFRC531 is a member of a new family
of highly integrated reader ICs. Each
member of the product family has a unique
product type identification. The value of the
product type identification is shown in
Table
13.
3
0Fh
ISO/IEC 14443 reader IC
Section 11.4.1 on
MFRC531
30). The mean value
© NXP B.V. 2010. All rights reserved.
4
XXh
[1]
S(ref)maxP
13 of 116
and