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Application Perspectives
1. Vacuum Fluorescent Display Controller/Driver
(H8/3714 Series, H8/3724 Series, and H8/3754 Series)
Features
Hitachi, Ltd. provides the 64-pin package H8/3714 Series and the 80-pin package H8/3724
Series and H8/3754 Series as built-in vacuum fluorescent display (VFD) controller/driver
microcomputers for use with applications incorporating fluorescent display. The H8/3714
Series provides 16 kbytes to 32 kbytes of on-chip ROM, H8/3724 Series provides 24 kbytes to
48 kbytes, and the H8/3754 Series provides 24 kbytes to 32 kbytes.
The VFD controller/driver consists of display RAM, a display control circuit, and 40 V high
breakdown voltage drivers. Vacuum fluorescent display can be driven directly by simply
storing data corresponding to the segments to be driven in display RAM.
These microcomputers provide on-chip five types of timer, a 14-bit PWM, two serial
communication interface channels, and an 8-channel A/D converter as additional peripheral
functions.
Furthermore, these microcomputers support low voltage operation (2.7 V) and a rich set of low
power modes including microcomputer operation from a 32 kHz subclock making these
products optimal for applications which require backup operation during power outages or
battery operation.
Built-in vacuum fluorescent
display (VFD) controller/driver
Large on-chip RAM,
supporting realtime OS (HI8-3X)
Low power operation
Low voltage operation
(2.7 V to 5.5 V operation)
Vacuum Fluorescent Display Controller/Driver
•
Direct drive of VFD
•
Built-in controller:
H8/3714 Series: 16 digits × 16 segments
H8/3724 Series: 16 digits
H8/3754 Series: 16 digits × 20 segments
•
H8/3754 Series:
1-kbyte RAM
•
H8/3726:
1-kbyte RAM
•
Backup operation during power outage
•
Can be used with battery driven equipment that
does not use VFD.
16
× 20 segments
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