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Hitachi H8/300L Series Manual page 58

Single-chip microcomputer
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H8/3712, H8/3713, H8/3714
The H8/3714 Series microcomputers are
8-bit single chip microcomputers that can
directly drive vacuum fluorescent displays
The H8/3712, H8/3713, and H8/3714
microcomputers integrate, around an
H8/300L CPU core, a rich set of peripheral
functions, including 16, 24, and 32 kbytes
of ROM, 384, 384, and 512 bytes of RAM,
a VFD (vacuum fluorescent display)
controller/driver, timers, two serial
communications interfaces, a 14-bit PWM, an A/D converter, and I/O ports. Since these
microcomputers include high breakdown voltage pins that can directly drive VFD panels,
they are particularly suited for use in applications that require VFD.
Additionally, the H8/3714 Series includes a ZTAT™ (zero turn around time) version of the
H8/3714 that allows users to freely write programs to the on-chip PROM.
• 16, 24, and 32 kbytes of on-chip ROM
• 384, 384, and 512 bytes of on-chip RAM
• VFD controller/driver
— Digit pins: 1 to 16 pins
— Segment pins: 1 to 24 pins (of which 8 also function as digit pins)
— Function supporting a variable number of display digits
— Eight level dimmer function
• Five 8-bit multi-function timer channels
— Timer A: 8-bit interval timer or clock timer
— Timer B: 8-bit reload timer or event counter
— Timer C: 8-bit reload timer or event counter
— Timer D: 8-bit event counter
— Timer E: 8-bit reload timer
• Serial communications interface (two channels)
— SCI1: 8- or 16-bit clock synchronous transfers
— SCI2: 8-bit clock synchronous transfers (includes a 32-byte data buffer)



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