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

ib technology
Data Sheet
RWD_QT.pdf
19 Pages
Last Revised 09/08/11
Micro RWD Quad-Tag Reader
The MicroRWD “QT” (Quad-Tag) version is a complete 125kHz reader solution for Hitag 1,
Hitag S256/S2048 (Plain Memory mode), Hitag 2 (Password mode), EM400X/4102 and
MCRF200I/123 passive RFID transponder types. The solution only needs a 700 µH antenna
coil connected and 5v DC supply to be a fully featured read/write system. The module
provides internal EEPROM memory for holding lists of authorised identity codes, a manual
override switch facility and has LED drives to give visual indication of acceptance.
MicroRWD QT combined Hitag 1/S, Hitag 2, EM400X and MCRF200/123 reader device
+5v
Red LED
SW override
1k Green LED
+5v
LOAD
25ma (sink) (O/P) drives
0v GND
700 uH Antenna
(34 SWG wire)
22R nom
Screen
(if applicable)
1
24
2
23
3
22
4
21
5 _Micro 20
6 _RWD 19
7 ^QT 18
8
17
9
16
10
15
11
14
12
13
CTS
Tx ^TTL
RS232 I/F
Rx
+5v DC supply
25ma (sink) O/P drives
Micro RWD Chip Module (not to scale)
24 pin DIL package (32 mm x 18 mm)
The MicroRWD also has a TTL level RS232 interface that allows a host system to
communicate with the RWD if necessary, so that system features can be customised,
configurations changed and tag read/write data handled by the host system. The MicroRWD
QT version uses the same basic hardware as previous MicroRWD versions but has a larger
memory microcontroller to accommodate the software for reading four different tag types.
The QT version is pin-for-pin, host interface and command protocol compatible with the
individual H1/S, H2, EM400X and MCRF200 reader versions. Functionally, the only
difference is that the MicroRWD QT internal EEPROM parameter map has been changed to
accommodate all the parameters from all the individual versions.
A new command code (ASCII "v", 0x76) plus a parameter byte can be used to select the three
main transponder types, a parameter in the EEPROM map further selects between EM400X
and MC200/123 types.
1