MLX90132 Datasheet, PDF (22/44 Pages) Melexis Microelectronic Systems – 13.56MHz RFID / NFC Transceiver

MLX90132
13.56MHz RFID / NFC Transceiver
6.6.2 List of Error codes
The error code returned in the case of a“SendRecv” command includes the last error raised by the device in
the field<ErrorCode>. But, it could also include a buffer of error if the EMD algorithm is enabled. This list of
errors is stored into the dedicated buffer of maximum 8-bytes <ErrorBuf> with its length indicated in the error
buffer length value <ErrorBufLen>. The list of error codes which could be returned after a “SendRecv”
command is shown in the table below. The error codes marked with a * could be raised during the EMD
process and stored in the Error buffer. For more information related to the EMD algorithm, please refer to the
chapter Electromagnetic support (EMD) below.
Direction
Device - MCU
Error Code
0x61*
0x62*
0x63*
0x65*
0x66*
0x67*
0x68*
0x86
0x82
0x83
0x87
0x88
0x89
Definition
SOF error during the EMD process
CRC error during the EMD process
SOF error in ISO14443B occurs during high part (duration of 2 to 3 Elementary Unit Time, ETU)
SOF error in ISO14443B occurs during low part (duration of 10 to 11 Elementary Unit Time, ETU)
Extra Guard Time (EGT) error in ISO14443B
TR1 set by card too long in case of protocol ISO14443B
TR1 set by card too short in case of protocol ISO14443B
Hardware Communication error
Invalid command Length
Invalid Protocol
Frame waiting timeout (no valid reception) or no TAG
Invalid SOF
Receive buffer overflow (too many bytes received)
0x8A
Protocol Framing error as follows:
 ISO14443A & ISO18092 (106kbps) : Modified Miller, wrong symbol sequence
 ISO14443B: Start/Stop bit polarity
 ISO18092 (212,424kbps): SYNC ≠ 0xB24D
0x8B
0x8C
0x8D
0x8E
EGT time out (ISO14443B)
Invalid length received during ISO18092 (212,424kbps) communication (2 < Length < 255)
CRC error in case of protocolISO18092 (212,424kbps)
Reception lost without EOF received
Table 17: List of error codes for “SendRecv” command
3901090132
Rev. 009
Page 22 of 44
Jan-2014