HID Global Corporation 5553 Manuale Utente

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HF Multi ISO RFID Reader User Manual, Firmware V1.4 
 
1508-USM-00-0-04 
2.3.5.2.3 
Option Byte 
This byte contains common transfer options. 
Bit 
Description 
0, 1, 3 
Bit framing. Number of bits of the last byte to transmit. 
4 – 7 
RFU 
2.3.5.2.4 
Transmit Byte 
This byte contains transmit transfer options. 
Bit 
Description 
If set, the transmission of data is activated. 
If set, parity generation is enabled 
If set, parity is odd, otherwise parity is even 
If set, CRC generation for transmission is enabled 
If set, an 8-bit CRC is calculated, otherwise a 16-bit CRC is calculated. 
If set, CRC is calculated according to ISO 14443 B, otherwise it is calculated 
according to ISO 14443 A. 
6, 7 
RFU 
2.3.5.2.5 
Receive Byte 
This byte contains receive transfer options. 
Bit 
Description 
If set, the receiving of data is activated. 
If set, parity generation is enabled 
If set, parity is odd, otherwise parity is even 
If set, CRC generation for receiving is enabled 
If set, an 8-bit CRC is calculated, otherwise a 16-bit CRC is calculated. 
If set, CRC is calculated according to ISO 14443 B, otherwise it is calculated 
according to ISO 14443 A. 
6, 7 
RFU 
2.3.5.2.6 
CRC Preset LSB 
This byte contains the LSB of the CRC preset. 
2.3.5.2.7 
CRC Preset MSB 
This byte contains the MSB of the CRC preset. 
2.3.5.2.8 
CRC generation 
CRC generation is described in ISO 14443-3 Appendix B. 
The CRC must be interpreted with LSB first. 
August 2010 
 
Page 93 of 144 
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