HID Global Corporation 5553 Benutzerhandbuch
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
0
If set, the transmission of data is activated.
1
If set, parity generation is enabled
2
If set, parity is odd, otherwise parity is even
3
If set, CRC generation for transmission is enabled
4
If set, an 8-bit CRC is calculated, otherwise a 16-bit CRC is calculated.
5
If set, CRC is calculated according to ISO 14443 B, otherwise it is calculated
according to ISO 14443 A.
according to ISO 14443 A.
6, 7
RFU
2.3.5.2.5
Receive Byte
This byte contains receive transfer options.
Bit
Description
0
If set, the receiving of data is activated.
1
If set, parity generation is enabled
2
If set, parity is odd, otherwise parity is even
3
If set, CRC generation for receiving is enabled
4
If set, an 8-bit CRC is calculated, otherwise a 16-bit CRC is calculated.
5
If set, CRC is calculated according to ISO 14443 B, otherwise it is calculated
according to ISO 14443 A.
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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