HID Global Corporation 5553 Manuale Utente

HF Multi ISO RFID Reader User Manual, Firmware V1.4

1508-USM-00-0-04

2.3.7 ‘e’ command – SAM data frame transfer

This command sends a custom data block to a SAM. Refer to ISO/IEC 7816 for more detail.

Note: The SAM interface hardware does not support error repetition and does not check the parity
bit. Inverse convention cards are also not supported. T=0 is not supported for non-ISO standard
speeds.

There are two versions of this command. A flag bit in the option byte defines the command
version. Version 1 is the earlier one, now deprecated. Version 2 now supports ISO/IEC 7816
timeouts (BWT, CWT, WWT) both manual and automatic, TPDU interface for T=0, T=1 and a full
frame length with buffer mechanism

‘e’ command

Command

Data

'e'

Version 1:
Downlink length (1 byte)
Option byte (1 byte)
Time-out (1 byte)
Transmission factor byte (1 byte)
Data (n bytes)

Version 2:
Downlink length LSB (1 byte)
Option byte (1 byte)
Downlink length MSB (1 byte)
Time-out (1 byte)
Transmission factor byte (1 byte)
Return length
Data (n bytes)

Answer – Version 1

Answer

Description

Data SAM

response

'P'

End of communication

'C'

Error: CRC error

'F'

Error: General failure or incorrect ATR

'N'

Error: No SAM detected

Answer – Version 2

Answer

Description

Error Code

00h – no error
01h – error
02h – wrong parameter

Length

Data length (2bytes): optional, depends on command code used

Data SAM

response

August 2010

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