ACS ACR122L, User Manual

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ACR122L – Communication Protocol
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Results SW1 SW2 Meaning
Parameter Error 63 7Fh The TAG Command is wrong.
6.2. Change Communication Speed
This command is used to change the baud rate.
Note:
STX = 32h and ETX = 33h
Baud Rate Control Command Format (9 Bytes)
Command Class INS P1 P2 Lc
Baud Rate Control FFh 00h 44h New Baud Rate 00h
Where:
P2 New Baud Rate.
00h = Set the new baud rate to 9600 bps.
01h = Set the new baud rate to 115200 bps.
Data Out
SW1 SW2.
Status Code
Results SW1 SW2 Meaning
Success 90 Current Baud Rate The operation is completed successfully.
Error 63 00h The operation is failed.
Where:
SW2 Current Baud Rate.
00h = The current baud rate is 9600 bps.
01h = The current baud rate is 115200 bps.
Note: After the communication speed is changed successfully, the program has to adjust its
communication speed 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)
Example 1:
To initialize a FeliCa Tag (Tag Polling).
Step 1. Issue a “Direct Transmit” APDU.
The APDU Command should be “FF 00 00 00 09 D4 4A 01 01 00 FF FF 01 00”
In which,
Direct Transmit APDU = “FF 00 00 00”
Length of the Tag Command = “09”