Table of Contents
Advertisement
IQH3-FP-V1
Operation
All ISO15693-compliant read/write tags have a unique 8 byte read-only code. The read-only
code is determined by the chip manufacturer. The user can only read it and it cannot be
changed. In addition, the read/write tags have a memory for user data. This can be written with
application-specific data and read. The size of the memory for the user data differs according
to the tag type.
The memory is divided into blocks with a length of 4 bytes. There are also exceptions with a
block length of 8 bytes or 32 bytes.
The read and write commands use the "Number of bytes" and "Start address" parameters. This
defines how many bytes are accessed in the memory of the user data and from which memory
address this starts. If the tag type used, for example, has a block length of 4 bytes, the values of
the "Number of bytes" and "Start address" parameters must be a multiple of 4. In the case of a
block length of 8 or 32 bytes, they are multiples of 8 or 32.
6.2
General
The information below contains details about the commands that relate to your read/write
device. The commands are described using the example of an IDENTControl control interface
with serial interface. All other generally applicable commands and error messages or status
messages can be found in the manual for your IDENTControl control interface.
6.3
Sensing Range
The read/write device is classified with a sensing range of up to 30 cm. The range of the device
depends on the tags to be identified and may therefore vary. You can increase or decrease the
sensing range by changing the transmit power accordingly.
Note
To comply with the limit value of the magnetic field strength of max. 10 A/m in accordance with
ISO 15693-1, a minimum distance of 50 mm must be maintained between the tag and the
read/write device at a transmit power PT > 1. Otherwise, there is a risk that a tag will be
damaged in the close range. Reduce the transmit power of the read/write device to PT = 1 to
meet the limit value at small minimum distances.
6.4
Multiple Tags in Sensing Range
Each read or write command can access one, several, or all tags in the sensing range. To
respond to specific tags in the sensing range, you can set a filter to the tag UIDs via the TI
parameter. See "Tag ID Filter TI" on page 34.
Note
For applications in the multi-frame protocol, always use tags of the same tag type.
6.5
Overview of Commands
The commands in the list are described in detail on the following pages.
The following uses the command syntax for the IQH3-FP-V1 read/write device with IDENTCon-
trol serial control interface. The channel number <ChanNo> is included in the commands.
Read/Write Commands
Abbrevia-
tion
SF
EF
SR
22
Command description
See "Single Read Read-Only Code SF" on page 23
See "Enhanced Buffered Read Read-Only Code EF" on page 23
See "Single Read Words SR" on page 23
Advertisement
Table of Contents
