This vacuum fluorescent display (VFD) module consists of a
16 character by 2 line 5?8 dot matrix display, DC-DC/AC
converter, and controller/driver circuitry.
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The module can be configured for a
Motorola M68-type parallel interface, an Intel I80-type parallel interface, or
a synchronous serial interface.
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A character generator ROM with 240 5X8 characters is provided along with
RAM for the user to program an additional 8 characters. The luminance level of
the VFD can be varied by setting two bits in the function set instruction.
Two hundred and thirty eight
character fonts consisting of a alphabets, katakanas, numerals and other
symbols can be displayed.
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This module has a dual-port RAM that allows data and
instructions to be the module continuously. Thus, the busy flag is always 0 and
the host never has to read the busy flag bit to determine if the module is
busy.
Due to this feature, the execution times for each
instruction are not specified.