ACS ACR1255U-J1, Reference Manual

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ACR1255U-J1 – Reference Manual
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6.4.5. Value Block Operation (INC, DEC, STORE)
This command is used for manipulating value-based transactions (e.g., increment a value of the value
block).
Value Block Operation APDU Format (10 bytes)
Command Class INS P1 P2 Lc Data In
Value Block
Operation
FFh D7h 00h
Block
Number
05h VB_OP
VB_Value
(4 bytes)
{MSB .. LSB}
Where:
Block Number 1 byte. The value block to be manipulated.
VB_OP 1 byte.
00h = Store the VB_Value into the block. The block will then be
converted to a value block.
01h = Increment the value of the value block by the VB_Value. This
command is only valid for value block.
02h = Decrement the value of the value block by the VB_Value. This
command is only valid for value block.
VB_Value 4 bytes. The value used for value manipulation. The value is a signed
long integer (4 bytes).
Example 1: Decimal –4 = {FFh, FFh, FFh, FCh}
VB_Value
MSB LSB
FFh FFh FFh FCh
Example 2: Decimal 1 = {00h, 00h, 00h, 01h}
VB_Value
MSB LSB
00h 00h 00h 01h
Value Block Operation Response Format (2 bytes)
Response Data Out
Result SW1 SW2
Value Block Operation Response Codes
Results SW1 SW2 Meaning
Success 90h 00h The operation is completed successfully.
Error 63h 00h The operation is failed.