User's Manual

ACR122L-ACS Design Specification
Version 0.03 19/05/2010
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ACR122L
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ACS
5.15. Pseudo APDU for changing the communication speed
This APDU is used to change the baud rate.
**Remark: STX = 0x32 and ETX = 0x33
Table 15.0A: Baud Rate Control Command Format (9 Bytes)
Command Class INS P1 P2 Lc
Baud Rate
Control
0xFF 0x00 0x44 New Baud Rate 0x00
P2: New Baud Rate
0x00: Set the new baud rate to 9600 bps.
0x01: Set the new baud rate to 115200 bps.
**Remark: The feedback’s STX = 0x02 and ETX = 0x03
Data Out: SW1 SW2.
Table 15.0B: Status Code
Results SW1 SW2 Meaning
Success 90 Current Baud Rate The operation is completed successfully.
Error 63 00 The operation is failed.
SW2: Current Baud Rate
0x00: The current baud rate is 9600 bps.
0x01: The current baud rate is 115200 bps.
Remark:
After the communication speed is changed successfully, the program has to adjust its communication
speed so as to continue the rest of the data exchanges.
The initial communication speed is determined by the existence of R12 (0 ohm).
• With R12 = 115200 bps
• Without R12 = 9600 bps (default)