User's Manual

ACR1281U
 Advanced Card Systems Ltd. Page 55 of 81
BYTE 1 … … BYTE N PROT 1 PROT 2 PROT3 PROT 4 SW1 SW2
• BYTE x Data read from memory card
• PROT y Bytes containing the protection bits from protection memory
• SW1, SW2 = 90 00 if no error
• The arrangement of the protection bits in the PROT bytes is as follows:
PROT 1 PROT 2 …
P8 P7 P6 P5 P4 P3 P2 P1 P16 P15 P14 P13 P12 P11 P10 P9 .. .. .. .. .. .. P18 P17
• Px is the protection bit of BYTE x in the response data
• ‘0’ byte is write protected
• ‘1’ byte can be written
6.3 Read Present Error Counter Memory Card (only SLE4442 and SLE5542)
To read the presentation error counter for the secret code.
• Command format
Pseudo-APDU
CLA INS P1 P2 MEM_L
FF
H
B1
H
00
H
00
H
04
H
• Response data format
ERRCNT DUMMY 1 DUMMY 2 DUMMY 3 SW1 SW2
• ERRCNT The value of the presentation error counter. 07 indicates the last verification
is correct. 00 indicates the password is locked (exceed maximum number of retries). Other
values indicate the last verification is failed.
• DUMMY Three bytes dummy data read from the card.
• SW1, SW2 = 90 00 if no error
6.4 Read Protection Bits
To read the protection bits for the first 32 bytes.
• Command format
Pseudo-APDU
CLA INS P1 P2 MEM_L
FF
H
B2
H
00
H
00
H
04
H
• Response data format