5-26 Expansion Modules
FO-VFKB Fibre Optic Keypad/Display Interface
Trio Motion Technology
FO-VFKB Fibre Optic Keypad/Display Interface
This is not packaged as a module like the rest of the TRIO range. Instead it is a
single PCB designed to fix directly on to the back of a Vacuum Fluorescent dis-
play to allow customers to easily build their own design of membrane keypad
on the Trio fibre-optic network.
The connectors and mounting holes on the board are specifically intended for
mounting on the following displays:
Other displays can be supported but connection may have to be made via a
short cable from the display to the FO-VFKB. To give reliable, noise free trans-
mission of data to and from the FO-VFKB, the link to the master module is
made with a fibre optic cable.
FO-VFKB Display Interface
Display Interface DIL connector:
FO-VFKB Keypad Interface
The keypad interface permits connection of proprietary or custom keypads
with matrix outputs of up to 5 rows by 11 columns. Up to five common output
keypads may be connected provided that each one has no more than 11 keys.
The keypad is easily accessed via Trio BASIC commands which enables a pro-
ITRON
2 x 20
4 x 20
FUNCTION PIN NO. FUNCTION
D7
12D6
D5
34D4
D3
56D2
D1
78D0
WR
910GND
N/C
11 12 BUSY
GND
13 14 GND
+5V
15 16 +5V
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