User's Manual

Product Manual - RFID Reader UF70 Certum 50
Chapter 7
Operation
The bit-oriented mask determines what data will actually be overwritten in the
masked write. The mask has the same length as the data to be written and actual
data is only written in the places where a 1 is located in the mask. The mask is
passed in the same order and length as the masked data to be written.
Example:
N=1  describe a data word masked
Transponder content: 0x5678
New data: 0x1234
Mask: 0x0F0F
 new transponder content: 0x5274
The memory areas of the EPC transponder are addressed by 4 byte word
pointers. The LSB byte is transmitted first during the transmission. The data are
interpreted in HEX format. That is, two ASCII characters in the message equal
one byte of data in HEX format. The exact memory distribution can be derived
from the EPC Global standard.
The EPC transponder has multiple memory banks, which are addressed by
number. The exact memory structure can be derived from the EPC Global
standard chapter. The data are interpreted in HEX format. That is, two ASCII
characters in the message equal one byte of data in HEX format.
Values:
"00" (0x00) Reserved
"01" (0x01) EPC
"02" (0x02) TID
"03" (0x03) User
The number of data words (1 data word consists of 2 bytes), which are read and
written, are hereby defined.
The data are interpreted in HEX format. That is, two ASCII characters in the
message equal one byte of data in HEX format.
Mask N* 4 bytes
Memory address 8 bytes
Memory bank 2 bytes
Number of data words 2 bytes