Advanced Card Systems ACM1281U-C7, Reference Manual

Page: 21 / 44

ACM1281U-C7
– Reference Manual
info@acs.com.hk
Version 1.02
www.acs.com.hk
Page 21 of 44
www.acs.com
.hk
5.1.3.5. Value Block Operation (Increment, Decrement, Store)
This command is used to manipulate value-based transactions (e.g., increment a value block, etc.).
Command
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)
Value Block to be manipulated
VB_OP (1 byte)
Value block operation
00h = Store 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 blocks.
02h = Decrement the value of the value block by the VB_Value .
This command is only valid for value blocks.
VB_Value (4 bytes)
The value used for manipulation. The value is a signed long integer.
Example 1: Decimal - 4 = { FF FF FF FCh }
VB_Value
MSB LSB
FFh FFh FFh FCh
Example 2: Decimal 1 = { 00 00 00 01h }
VB_Value
MSB LSB
00h 00h 00h 01h
Response
Response Data Out
Result SW1 SW2
Where:
SW1 SW2 = 90 00h means the operation was completed successfully.
= 63 00h means the operation failed.