Section 1 Overview
1.1
Overview
The H8/3437 Series of single-chip microcomputers features an H8/300 CPU core and a
complement of on-chip supporting modules implementing a variety of system functions.
The H8/300 CPU is a high-speed processor with an architecture featuring powerful bit-
manipulation instructions, ideally suited for realtime control applications. The on-chip supporting
modules implement peripheral functions needed in system configurations. These include ROM,
RAM, four types of timers (a 16-bit free-running timer, 8-bit timers, PWM timers, and a watchdog
timer), a serial communication interface (SCI), an I2C bus interface [option], a host interface
(HIF), an A/D converter, a D/A converter, and I/O ports.
The H8/3437 Series can operate in single-chip mode or in two expanded modes, depending on the
requirements of the application.
Besides the mask-ROM versions of the H8/3437 Series, there are ZTAT™*1 versions with on-chip
PROM, and an F-ZTAT™*2 version with on-chip flash memory. The F-ZTAT™ version can be
programmed or reprogrammed on-board in application systems.
Notes: *1 ZTAT™ (zero turn-around time) is a trademark of Hitachi, Ltd.
*2 F-ZTAT™ (flexible-ZTAT) is a trademark of Hitachi, Ltd.
The guaranteed voltage range is different for the F-ZTAT LH version.
LH Version
General Version
VCC
3.0 V to 5.5 V
2.7 V to 5.5 V
AVCC
Table 1.1 lists the features of the H8/3437 Series.
1
HITACHI [ HITACHI SEMICONDUCTOR ]
