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Chapter 1.
Introduction
The WDT2200 is a programmable and flexible data collection device that can be utilized in a variety
of data acquisition applications. It can be used as a portable data entry device or as a programmable
dedicated computer that receives and runs application programs downloaded from a host computer.
The WDT2200 is equipped with a 16-bit INTEL 8088 compatible microprocessor, and has 256K of
user updateable FLASH ROM that includes a rich set of DOS functions and device drivers for
application development, including bar code decoding, display, keypad, communications, and a real
time clock/calendar.
Keypad
The WDT2200 can be purchased with 2.5MB of on-board RAM. The RAM memory is powered by
the rechargeable main Li-ion battery pack and a backup Lithium button cell battery, which retains
the data stored in RAM and powers the real time calendar/clock when the main battery is drained.
The WDT2200 has a 128x64 pixel backlit graphic LCD display, an integral 27-key keypad, a built-
in laser or CCD bar code scanner module and an RS-232 serial port for data communication with a
host PC.
1.1 Programming
The WDT2200 system kernel includes three basic modules: 1. Device driver, 2 File manager and
3.DOS manager. The WDT2200 terminal can be programmed using an E-PROM resident
application program called FormCaching, a Windows-based, high-level application generator
AppGen, Microsoft C, Borland C, Turbo C, Turbo Pascal and IBM PC macro assembler. The
ROM based firmware of the terminal provides emulated MS/DOS function calls. The programmer
can design the application programs by calling those functions just like in a DOS environment.
The calling and parameter passing conventions are compatible to that of MS/DOS and the
programs are in the EXE format. Programming details are included in the WDT2200
programming manual in this binder.
WDT2200 BLOCK DIAGRAM
128x64
bit map
Graphic
LCD
256K
Driver
Flash ROM
Key
RS-232
Matrix
Serial
© 2003 Wasp Technologies, Inc.
Lithium
Battery
RAM
512K-
16-bit
2.5MB
CPU
Bar
Integrated
Scan
Laser Diode
Page 3 of 41
Real
Time
Clock
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