ST25R95 datasheet(11/61 Pages) STMICROELECTRONICS

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4.1.2

Interrupt mode

When the ST25R95 is ready to send back a reply, it sends an Interrupt Request by setting a low level on pin

IRQ_OUT, which remains low until the host reads the data.

The application can use the Interrupt mode to skip the polling stage.

4.2

Error codes

Table 6. Possible error codes and their meaning

Code

Name

Meaning

0X63

EEmdSOFerror23

SOF error in high part (duration 2 to 3 etu) in ISO/IEC 14443B

0x65

EEmdSOFerror10

SOF error in low part (duration 10 to 11 etu) in ISO/IEC 14443B

0x66

EEmdEgt

Error Extennded Guard Time error in ISO/IEC 14443B

0x67

ETr1 Too Big

Too long TR1 send by the card, reception stopped in ISO/IEC 14443BT

0x68

ETr1Too small

Too small TR1 send by the card in ISO/IEC 14443B

0x71

EinternalError

Wong frame format decodes

0x80

EFrameRecvOK

Frame correctly received (additionally see CRC/Parity information)

0x82

EInvalidCmdLen

Invalid command length

0x83

EInvalidProto

Invalid protocol

0x85

EUserStop

Stopped by user (used only in Card mode)

0x86

ECommError

Hardware communication error

0x87

EFrameWaitTOut

Frame wait time out (no valid reception)

0x88

EInvalidSof

Invalid SOF

0x89

EBufOverflow

Too many bytes received and data still arriving

0x8A

EFramingError

if start bit = 1 or stop bit = 0

0x8B

EEgtError

EGT time out

0x8C

EInvalidLen

Valid for FeliCa™, if Length <3

0x8D

ECrcError

CRC error, Valid only for FeliCa™

0x8E

ERecvLost

When reception is lost without EOF received (or subcarrier was lost)

0x8F

ENoField

When Listen command detects the absence of external field

0x90

EUnintByte

Residual bits in last byte. Useful for ACK/NAK reception of ISO/IEC 14443 Type A.

Note:

In response to some commands the ST25R95 may provide data in addition to the error code. It is therefore

necessary to always read the length byte and any appended data even if the response code indicates an error

condition.

ST25R95

Error codes

DS12807 - Rev 4

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