HID Global Corporation 5553 Manuale Utente

 

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

 

1508-USM-00-0-04 

Answer 

Uplink length+Data  Response of card 

'C' Error: 

Collision 

'F' Error: 

General 

failure 

'N' 

Error: No tag in field    [addressed tag not present or not responding] 

'O' Error: 

Overflow 

 

The downlink length byte contains only the data length. This byte may not be zero. The CRC is 
computed automatically and is not included in the downlink length. 

CRC generation – see 

Option Byte - ISO 14443

 or 

Option Byte – ISO 15693

. 

CRC generation is described in ISO 14443-3 Appendix B.  If enabled, interpret the CRC with the 
LSB first.  If CRC checking and generation is disabled, the maximum size of data to receive and 
transmit decreases to 253 bytes

.

 

 

This byte contains the transfer options for ISO 14443 and I-Code. For ISO 14443 type B, I-Code 
and SR176 tags, only bits 2 and 3 are interpreted. The crypto unit is only activated after a 
successful login. 

0 

If set, parity generation is enabled 

1 

If set, parity is even, otherwise parity is odd 

2 

If set, CRC generation for transmission is enabled 

3 

If set, CRC checking for receiving is enabled 

If set, the crypto unit is deactivated prior to start of transmission. Only the login 
sequence switches on the crypto unit correctly. 

4 

5, 6, 7 

Bit framing. Number of bits of the last byte to transmit.  

This byte contains the transfer options for ISO 15693. 

7 

If set the CRC is deactivated for transmit. 

6  

If set the CRC is deactivated for receive. 

5 - 0 

RFU 

August 2010 

 

Page 91 of 144 

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