HID Global Corporation 5553 Manuale Utente
1508-USM-00-0-04
HF Multi ISO RFID Reader User Manual, Firmware V1.4
Receiving the answer
The reader switches to receiving mode automatically after data is sent. If no data is detected the
reader returns the error 'N' no tag in field. If the time-out value (registers 10h and 11h) is too short,
the reader will abort the tag detection process before the answer is received. Increase the time-out
value and the communication will work.
reader returns the error 'N' no tag in field. If the time-out value (registers 10h and 11h) is too short,
the reader will abort the tag detection process before the answer is received. Increase the time-out
value and the communication will work.
Answer = 'C' - Collision
If a collision is detected, (more than one tag in the field) the anti-collision sequence is required
before accessing the tags. Anti-collision is a complex procedure. The use of Multitag List and
Multitag select is recommended – see Multi-Tag Selection / List, page 50.
before accessing the tags. Anti-collision is a complex procedure. The use of Multitag List and
Multitag select is recommended – see Multi-Tag Selection / List, page 50.
Answer = Uplink length + Data
This would be the expected response
Examples for ISO14443-A tags (in ASCII mode)
Select sequence for a single tag in the field – refer to ISO14443-3 specification for details
Command
Answer
Description
t 01 E3 26
02 0400
7 bit (E) REQA (code = 0x26)
Answer = ATQA (04 00)
Answer = ATQA (04 00)
t 02 03 93 20
07 0481635640F480
Get full serial number (code=0x93,
NVB=0x20). Answer = serial No
NVB=0x20). Answer = serial No
t 09 0F 93 70 0481635640F480 01 88
Select card with UID 0481635640F480
Answer = SAK
Answer = SAK
t 02 0F 30 04
10 010203...
Read block 4: (after login)
command code is 0x30
command code is 0x30
2.3.5.2
Transmit / Receive mode
Command
Data
Transmit/Receive mode
Downlink length (1 byte) = 0
Downlink length new (1 byte)
Option byte (1 byte)
Transmit byte (1 byte)
Receive byte (1 byte)
CRC Preset LSB (1 byte)
CRC Preset MSB (1 byte)
Data (n bytes)
Downlink length new (1 byte)
Option byte (1 byte)
Transmit byte (1 byte)
Receive byte (1 byte)
CRC Preset LSB (1 byte)
CRC Preset MSB (1 byte)
Data (n bytes)
't'
In Transmit / Receive mode, data is sent to the tag in two steps. Furthermore, data is sent and
received separately with different options.
received separately with different options.
This mode only supports ISO 14443 up to part 1-3. (For example Mifare Ultralite tags)
2.3.5.2.1
Downlink length
The downlink length must be zero to activate the Transmit / Receive Mode.
2.3.5.2.2
Downlink length new
The downlink length includes only the data length.
Page 92 of 144
August 2010
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