ACS ACK30 Smart Keyboard - Manual (Page 28)

ACR30 Reference Manual
Version 3.3 January 2009 Page 28 of 44
ACR30
9.2.2. I2C-Bus cards (standard and extended addressing) (*)
9.2.2.1. RESET (*)
This command powers up the card inserted in the card reader. No action is taken if the card is
powered up when the command is being issued.
Command format
Instruction Code Data length
80
H
00
H
Response data format
No response data
9.2.2.2. 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
9.2.2.3. READ_DATA (*)
To read the specified number of bytes from the specified address of the card inserted.
Command format
Instruction
Code
Data length Data
ADDR LEN
90
H
03
H
ADDR Byte address of first byte to be read from the card. The high byte of the address is
specified as the first byte of ADDR.
LEN Number N of data bytes to be read from the card
(0 < N
≤ MAX_R)