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FMT 3000 Hardware Reference Manual - Introduction
(see Chapter 9, Custom Function Reference, of the FMT 3000 Software Manual) if the bar
code device generates its own “good read” beep to prevent dual good read beeps.
Keyboard Control
The Keyboard Control section is used to scan the integral keypad, provide external keyboard
and mouse interfaces, and to interface the CPU. The connectors for the external keyboard
and mouse are located inside the unit’s case. Both connectors are 6-pin mini DIN PS/2 style.
Full 102 key keyboards are supported. The mouse interface is serial bus type.
Although not related to the functioning of the Keyboard Control section, the main chip used
in the keyboard scanner also provides the general purpose digital I/O lines used to implement
the optional digital I/O interface section (described later under the Power Supply and Digital
I/O section) and the speaker volume control.
Dual PC Card Slots (PCMCIA)
The 6720 dual slot PCMCIA controller (from CIRRUS Logic) provides full PCMCIA
memory and I/O card support for two PCMCIA slots. This includes internal buffering and
power control logic.
A dual stacked PCMCIA connector is provided on the main board of the unit. This part
stands off the PCB by 5mm to allow components to be located underneath it. Either Type I
or II cards may be inserted in either slot and a Type III card is allowed in the top slot.
Note: No +12 V supply is present on the board for flash programming, as
many flash cards can now operate from +5 V only.
Hot insertion (i.e., with power on) of PC Cards is supported (when both card and socket
services are loaded) but not recommended since the case must be open to install cards. Other
exposed components may be damaged or shorted if objects are accidentally dropped in the
unit while the power is on.
Chapter 6, PC Card Slots,
of the FMT 3000 Software Manual discusses software support for
PC Card or PCMCIA devices.
Ethernet Interface
Each unit has a built-in Ethernet controller with a twisted-pair interface. The Ethernet
interface includes transmit and receive filters and diagnostic LED indicators (located inside
the unit’s case). The controller performs collision detection, re-transmission, automatic
polarity detection and correction on the twisted-pair, 10Base-T, cable. An 8-pin RJ-45