User's Manual

ACR1281U
 Advanced Card Systems Ltd. Page 35 of 81
2.4 Update Binary Blocks
The “Update Binary Blocks command” is used for writing a multiple of “data blocks” into the
PICC. The data block/trailer block must be authenticated first before executing the “Update Binary
Blocks command”.
Table 2.3-1a: Update Binary APDU Format (Multiple of 16 + 5 Bytes)
Command Class INS P1 P2 Lc Data In
Update Binary
Blocks
FF D6 00 Block
Number
Number
of Bytes
to
Update
Block Data
(Multiple of 16
Bytes)
Block Number (1 Byte):
The starting block to be updated.
Number of Bytes to Update (1 Byte):
• Multiply of 16 bytes for MIFARE 1K/4K or 4 bytes for MIFARE Ultralight.
• Maximum 48 bytes for MIFARE 1K. (Multiple Blocks Mode; 3 consecutive blocks)
• Maximum 240 bytes for MIFARE 4K. (Multiple Blocks Mode; 15 consecutive blocks)
Example 1: 0x10 (16 bytes). The starting block only. (Single Block Mode)
Example 2: 0x30 (48 bytes). From the starting block to starting block+2. (Multiple Blocks Mode)
#For safety reason, the Multiple Block Mode is used for accessing Data Blocks only. The Trailer
Block is not supposed to be accessed in Multiple Blocks Mode. Please use Single Block Mode to
access the Trailer Block.
Block Data (Multiply of 16 + 2 Bytes, or 6 bytes):
The data to be written into the binary block/blocks.
Table 2.3-1b: Update Binary Block Response Codes (2 Bytes)
Results SW1 SW2 Meaning
Success 90 00 The operation is completed
successfully.
Error 63 00 The operation is failed.
Examples:
// Update the binary block 0x04 of MIFARE 1K/4K with Data {00 01 .. 0F}
APDU = {FF D6 00 04 10 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F}
// Update the binary block 0x04 of MIFARE Ultralight with Data {00 01 02 03}
APDU = {FF D6 00 04 04 00 01 02 03}