Power_Off; Exchange_Tpdu_T0 - ACS ACR 38 Reference Manual

Response data format
ATR Answer-To-Reset as transmitted by the card according to ISO7816-3.
NOTE - The ATR is only returned in the ACR38 response if the communication protocol of the card is
compatible with the reader, i.e., if the card can be processed by the ACR38. Otherwise, the ACR38 returns
an error status and deactivates the smart card interface.

POWER_OFF

This command powers off the card inserted in the card reader.
Command format
Response data format

EXCHANGE_TPDU_T0

To exchange an APDU (Application Protocol Data Unit) command/response pair between the MCU card inserted in the ACR38
and the host computer.
Command format
LEN Length of APDU command data, N
Data T0 TPDU to be sent to the card
Case 1: CLA INS P1 P2
Case 2: CLA INS P1 P2 Le
Case 3: CLA INS P1 P2 Lc Data
Case 4: Not supported. The driver/application should break case 4 command into case 3 +
case 2 commands.
ACR38 Reference Manual
Version 2.2 January 2008
A C R 3 8 S m a r t C a r d R e a d e r / W r i t e r
Header Status Data length
LEN
01
H
Header Instruction
01 81
H H
Header Status
01
H
Header Instruction Data length LEN
MSB
01 A0
H H
ATR
.........
Data length
LEN
00 00
H H
Data length
LEN
Data
LSB T0 TPDU
.........
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