CLRC63201T View Datasheet(PDF) - NXP Semiconductors.
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Description
MFG CO.
'CLRC63201T' PDF : 127 Pages View PDF
NXP Semiconductors
CLRC632
Standard multi-protocol reader solution
9.14.2 Authentication procedure
The Crypto1 security algorithm enables authentication of MIFARE cards. To obtain valid
authentication, the correct key has to be available in the key buffer of the CLRC632. This
can be ensured as follows:
1. Load the internal key buffer by using the LoadKeyE2 (see Section 11.7.1 on page 97)
or the LoadKey (see Section 11.7.2 on page 97) commands.
2. Start the Authent1 command (see Section 11.7.3 on page 98). When finished, check
the error flags to obtain the command execution status.
3. Start the Authent2 command (see Section 11.7.4 on page 98). When finished, check
the error flags and bit Crypto1On to obtain the command execution status.
10. CLRC632 registers
10.1 Register addressing modes
Three methods can be used to operate the CLRC632:
• initiating functions and controlling data by executing commands
• configuring the functional operation using a set of configuration bits
• monitoring the state of the CLRC632 by reading status flags
The commands, configuration bits and flags are accessed using the microprocessor
interface. The CLRC632 can internally address 64 registers using six address lines.
10.1.1 Page registers
The CLRC632 register set is segmented into eight pages contain eight registers each. A
Page register can always be addressed, irrespective of which page is currently selected.
10.1.2 Dedicated address bus
When using the CLRC632 with the dedicated address bus, the microprocessor defines
three address lines using address pins A0, A1 and A2. This enables addressing within a
page. To switch between registers in different pages a paging mechanism needs to be
used.
Table 36 shows how the register address is assembled.
Table 36. Dedicated address bus: assembling the register address
Register bit: UsePageSelect
Register address
1
PageSelect2 PageSelect1 PageSelect0
A2 A1 A0
10.1.3 Multiplexed address bus
The microprocessor may define all six address lines at once using the CLRC632 with a
multiplexed address bus. In this case either the paging mechanism or linear addressing
can be used.
Table 37 shows how the register address is assembled.
CLRC632
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.7 — 27 February 2014
073937
© NXP Semiconductors N.V. 2014. All rights reserved.
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