Datasheet

nugget Theory of Operation
4-7
4
Power Supplies
Source Description
VBATF Fused power that is generated from the main battery voltage (VBATMAIN) and
goes out to the 16-pin interface connector.
VCC230A A DC to DC Step-Up Converter that generates +5V, +5% from the main battery
voltage. It draws its operating current from VBAT and supplies up to 1.5 A. It
powers the Vadem VG-230, ASIC, PSRAM, PIC, switched VCCLCD, and 3-
finger reset function. The power supply switches between +5V when VPSYS is
active and +3.5V when VPSYS is inactive.
VCC A +5V, +5% power supply that is switched OFF or ON by VCC230A with
VPSYS. It powers scanner interfaces, flash memory, and scanner LEDs. It also
provides voltage for the PC card interface connector, beeper drive circuit, and
fused VCCEXT.
VCCLCD A +5V, +5% power supply that is switched OFF or ON from VCC230A by
VPLCD, which is controlled by VG-230. VCCLCD provides power to the LCD.
VCCEXT This power source goes to the 16-pin interface connector. VCCEXT is connected
to VCC through a fuse. The VCCEXT fuse can be reset.
VCCRF VCCRF is a +5V, +5% filtered VCC power source for the PC card/radio interface
connector. VCCRF switches ON or OFF with VPSYS.
VPP1, 2 PC card voltage. Supplied by VCC.
Interface Devices
These interface devices are available for the terminal.
External Devices
A 16-position connector (COM-PORT 1) enables the terminal to interface with many
externally connected devices.
This port offers full RS-232 serial communication (RXD, TXD, RTS, CTS) and is fully
controllable within the Serial Port Communications menu. Other input devices such as
wand-emulated based tethered scanners (TETH-VIDEO, TETH-SOS, TETH-LASEN,
TRIGGER, GOODRD) are also supported.