ACS ACR33U-A1 Smart Duo, Reference Manual

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ACR33U-A1 SmartDuo Reference Manual
Version 1.00
Page 38 of 56
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8.2.10.4. READ_PROTECTION_BIT
Command format (abData field in the PC_to_RDR_XfrBlock)
Pseudo-APDU
CLA INS Byte Address MEM_L
MSB LSB
FF
H
B2
H
MSB Byte Address = 0000 00A
9
A
8 b
is the memory address location of the memory card.
LSB Byte Address = A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0 b
is the memory address location of the
memory card.
MEM_L Length of protection bits to be read from the card, in multiples of 8
bits. Maximum value is 32.
MEM_L = 1 + INT( (number of bits-1)/8 )
For example, to read eight protection bits starting from memory
0x0010
, the following pseudo-APDU should be issued:
0xFF 0xB1 0x00 0x10 0x01
Response data format (abData field in the RDR_to_PC_DataBlock)
PROT
1
… … PROT
L
SW1 SW2
PROT y Bytes containing the protection bits
SW1,SW2 =
90
H
00
H
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