ACS ACR38 SAM Smart Card Reader - Manual (Page 17)

ACR38x – Reference Manual [email protected]
Version 6.02 www.acs.com.hk
Page 17 of 40
9.2. Card Commands
The Card Commands are directed toward the card inserted in the ACR38x. The structure of these
commands and the data transmitted in the commands and responses depend on the selected card
type.
9.2.1. MCU Card Command Set
9.2.1.1. RESET_WITH_5_VOLTS_DEFAULT
This command powers up the card inserted in the ACR38x and performs a card reset. If the card is
powered up when the command is being issued, only a reset of the card is carried out. The power
supply to the card is not switched off.
Command Format
Header Instruction
Data length
LEN
01h 80h 00h 00h
Response Data Format
Header Status
Data length
ATR
LEN
01h …
Where:
ATR Answer-To-Reset as transmitted by the card according to ISO 7816-3.
Note: ATR is only returned in the reader response if the communication protocol of the card is
compatible with the ACR38x, i.e., if the card can be processed by the reader. Otherwise, ACR38x
returns an error status and deactivates the smart card interface.
9.2.1.2. RESET_WITH_SPECIFIC_VOLTAGE
This command powers up the card inserted in the ACR38x and performs a card reset. If the card is
powered up when the command is being issued, only a reset of the card is carried out. The power
supply to the card is not switched off.
Command Format
Header Instruction
Data length
Data
LEN
01h 80h 00h 01h
Where:
Data = 00h for automatic voltage detection.
= 01h for 5-volt card.
= 02h for 3-volt card.
= 03h for 1.8-volt card.