ACS ACK30 Smart Keyboard - Manual (Page 24)

ACR30 Reference Manual
Version 3.3 January 2009 Page 24 of 44
ACR30
9.2.1.2. POWER_OFF (*)
This command powers off the card inserted in the card reader.
Command format
Instruction
Code
Data length
81
H
00
H
Response data format
No response data
9.2.1.3. READ_DATA (*)
To read the specified number of bytes from the specified address of the card inserted. The bytes are
read from the card with LSB first, i.e., the bit at card address 0 is regarded as the LSB of byte 0.
Command format
Instruction
Code
Data length Data
ADDR LEN
90
H
03
H
00
H
ADDR Byte address of first byte to be read from the card
LEN Number N of data bytes to be read from the card
(0 < N
≤ MAX_R)
Response data format
BYT
E 1
BYT
E 2
BYT
E 3
... ... BYT
E N
BYTE x Data bytes read from the card memory
9.2.1.4. WRITE_DATA (*)
To write one byte to the specified address of the card inserted. The byte is written to the card with
LSB first, i.e., the bit at card address 0 is regarded as the LSB of byte 0.
Two different WRITE modes are available for this card type, which are distinguished by a flag in the
command data field:
a) Write
The byte value specified in the command is written to the specified address. This command
can be used for writing personalization data and counter values to the card.