ACS ACK30 Smart Keyboard - Manual (Page 35)

ACR30 Reference Manual
Version 3.3 January 2009 Page 35 of 44
ACR30
'0' : byte is write protected
'1' : byte can be written
9.2.4.4. WRITE_DATA (*)
To write the specified data bytes to the specified address of the card inserted.
Command format
Instruction
Code
Data length Data
LEN ADDR BYTE
1
... ... BYTE
N
91
H
LEN Number of data bytes to be written to the card, N, + 2
ADDR Byte address in the card of the first byte to be written. The high byte of the address is
specified as the first byte of ADDR.
BYTE x Byte values to be written to the card starting at address ADDR. BYTE 1 is written to
address ADDR; BYTE N is written to address ADDR+N-1.
Response data format
No response data
9.2.4.5. WRITE_PROTECTION (*)
To write the protection bits for the specified addresses in the card.
Each of the bytes specified in the command is internally in the card compared with the byte stored at
the specified address and if the data match, the corresponding protection bit is irreversibly
programmed to '0'.
Command format
Instructio
n Code Data
length Data
LEN ADDR BYTE
1 ... ... BYTE
N
94
H
LEN Number of data bytes to be write protected, N, + 2
ADDR Byte address in the card of the first byte to be write protected. The high byte of the
address is specified as the first byte of ADDR.
BYTE x Byte values to be compared with the data in the card starting at address ADDR. BYTE 1
is compared with the data at address ADDR; BYTE N is compared with the data at
address ADDR+N-1.
Response data format
No response data