
CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
97 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
11.6 Error handling during command execution
If an error is detected during command execution, the PrimaryStatus register Err ag is
set. The microprocessor can evaluate the status ags in the ErrorFlag register to get
information about the cause of the error.
11.7 MIFARE security commands
11.7.1 LoadKeyE2 command 0Bh
The LoadKeyE2 command interprets the rst two bytes found in the FIFO buffer as the
EEPROM starting byte address. The EEPROM bytes starting from the given starting byte
address are interpreted as the key when stored in the correct key format as described in
FIFO buffer, the command executes.
The LoadKeyE2 command can only be started by the microprocessor and it automatically
stops after copying the key from the EEPROM to the key buffer.
11.7.1.1
Relevant LoadKeyE2 command error ags
value is copied into the key buffer and the KeyErr ag is set.
11.7.2 LoadKey command 19h
Table 154. ErrorFlag register error ags overview
Error ag
Related commands
KeyErr
LoadKeyE2, LoadKey
AccessErr
WriteE2, ReadE2, LoadCong
FIFOOvlf
no specic commands
CRCErr
Receive, Transceive, CalcCRC
FramingErr
Receive, Transceive
ParityErr
Receive, Transceive
CollErr
Receive, Transceive
Table 155. LoadKeyE2 command 0Bh
Command
Value
Action
Arguments and
data
Returned
data
LoadKeyE2
0Bh
reads a key from the EEPROM and
puts it into the internal key buffer
start address LSB
-
start address MSB
-
Table 156. LoadKey command 19h
Command Value
Action
Arguments and
data
Returned
data
LoadKey
19h
reads a key from the FIFO buffer and puts it
into the key buffer
byte 0 (LSB)
-
byte 1
-
…-
byte 10
-
byte 11 (MSB)
-