User's Manual

ACR122L
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USB
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ACS
6.7.5.3. Restore Value Block
The “Restore Value Block command” is used to copy a value from a value block to another value block.
Table 2.5.3-1a: Restore Value Block APDU Format (7 Bytes)
Command Class INS P1 P2 Lc Data In
Value Block
Operation
FF D7 00 Source
Block
Number
02 03 Target
Block
Number
Source Block Number (1 Byte): The value of the source value block will be copied to the target value
block.
Target Block Number (1 Byte): The value block to be restored. The source and target value blocks must
be in the same sector.
Table 2.5.3-1b: Restore Value Block Response Format (2 Bytes)
Response Data Out
Result SW1 SW2
Table 2.5.3-1c: Restore Value Block Response Codes
Results SW1 SW2 Meaning
Success 90 00 The operation is completed successfully.
Error 63 00 The operation is failed.
Examples:
// Store a value “1” into block 0x05
APDU = {FF D7 00 05 05 00 00 00 00 01}
// Read the value block 0x05
APDU = {FF B1 00 05 00}
// Copy the value from value block 0x05 to value block 0x06
APDU = {FF D7 00 05 02 03 06}
// Increment the value block 0x05 by “5”
APDU = {FF D7 00 05 05 01 00 00 00 05}