
CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
13 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
9.2.1 Product information eld (read only)
[1]
Byte 4 contains the current version number.
9.2.2 Register initialization les (read/write)
Register initialization from address 10h to address 2Fh is performed automatically during
initialization le.
In addition, the CLRC632 registers can be initialized using values from the register
Table 12.
Product information eld
Byte
Symbol
Access Value Description
15
CRC
R
-
the content of the product information eld
is secured using a CRC byte which is
checked during start-up
14
RsMaxP
R
-
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
of the maximum adjustable source
resistance for pins TX1 and TX2 is stored
as an integer value in
in this byte. Typical
values for RsMaxP are between 60
to
140
. This value is denoted as maximum
adjustable source resistance RS(ref)maxP and
is measured by setting the CwConductance
register’s GsCfgCW[5:0] bits to 01h.
13 to 12 Internal
R
-
two bytes for internal trimming parameters
11 to 8
Product Serial Number
R
-
a unique four byte serial number for the
device
7 to 5
reserved
R
-
4 to 0
Product Type
Identication
R
-
the CLRC632 is a member of a new family
of highly integrated reader ICs. Each
member of the product family has a unique
product type identication. The value of the
product type identication is shown in
Table 13.
Product type identication denition
Denition
Product type identication bytes
Byte
0
1
2
3
Value
30h
FFh
0Fh
XXh