RWD_QT Datasheet, PDF (6/19 Pages) rfsolutions.ltd – The MicroRWD “QT” (Quad-Tag) version is a complete 125kHz reader solution for Hitag 1,

ib technology
Message
Command to return product and firmware identifier string to host.
Command:
B7
B0
01111010
(ASCII “z”, 0x7A)
Reply:
“b IDE RWD H1 (SECx V1.xx) DD/MM/YY” 0x00
Returned string identifies author, product descriptor, project name, firmware version no. and
date of last software change. Note that the string is always NULL terminated. The string
begins with a unique lower case character that can be used to identify a particular version of
Micro RWD.
Reader Type
Command to allow selection of particular MicroRWD “Reader Type”. This command has the
same function as writing to parameter byte 17 (0x11) of the internal EEPROM using Program
EEPROM command. The Acknowledge byte reply confirms if parameter has been stored
correctly.
Command:
Argument1:
B7
B0
01110110
XXXXXXNN
(ASCII “v”, 0x76)
(NN bits = Reader Type selection parameter)
01 = Hitag 2 (0x01)
10 = Hitag 1/S (0x02 – factory default)
11 = EM400X/MC200 (0x03)
(00 parameter also selects Hitag 1 version)
Acknowledge: 1 1 X F X X X F
(F = Status flags, X = “don’t care” bits)
The “Reader Type” command has been added to the standard command set in order to allow
selection of the H1/S, H2 or EM400X Reader modes. This command automatically stores the
“Reader Type” parameter in the MicroRWD internal EEPROM (parameter byte 17) to allow
the required Reader Type selection from power-up. The standard PROGRAM EEPROM
command can also be used to store the parameter byte directly to location 17 to achieve the
same result.
When EM400X type is selected, MCRF200/123 transponder type can be further selected as a
subset of the main EM400X option. This achieved by storing 00 as the “EM400X/MC200”
selection parameter (byte 16) in the internal EEPROM (using Program EEPROM command).
Storing 01 as the selection parameter selects main EM400X type (factory default set to 01,
EM400X mode).
The selected Reader Type can be verified by sending the MESSAGE command (0x7A =
ASCII “z”). The message string returned has a unique ASCII character as the start of the
string (“a”, “b” or “c”) and this can be used to confirm Reader mode currently selected.
6