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Section 1 Overview
1.1
Overview
The H8/300L Series is a series of single-chip microcomputers (MCU: microcomputer unit), built
around the high-speed H8/300L CPU and equipped with peripheral system functions on-chip.
The H8/3937 and H8/3937R Series are H8/300L Series microcomputers with an on-chip FLEX™
decoder. With on-chip peripheral functions including a FLEX™ decoder, five kinds of timers, a
2-channel serial communication interface, and an A/D converter, the configuration of these series
makes them ideal for use as embedded microcomputers in pagers using the FLEX™ system,
which require low power consumption. Models in the H8/3937 Series and H8/3937R Series are
the H8/3935 and H8/3935R, with on-chip 40-kbyte ROM and 2-kbyte RAM, the H8/3936 and
H8/3936R, with on-chip 48-kbyte ROM and 2-kbyte RAM, and the H8/3937 and H8/3937R, with
on-chip 60-kbyte ROM and 2-kbyte RAM.
The H8/3937 and H8/3937R Series are also available in a ZTAT™* version with on-chip PROM
which can be programmed as required by the user.
The H8/3937 Series supports non-roaming, while the H8/3937R Series supports roaming.
Table 1-1 summarizes the features of the H8/3937 Series and H8/3937R Series.
Note: * ZTAT (Zero Turn Around Time) is a trademark of Hitachi, Ltd.
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