Section 1 Overview
1.1
Overview
The H8/3337 Series and the H8/3397 Series of single-chip microcomputers feature 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 H8/3397 Series is a subset of the
H8/3337 Series and does not include an I2C bus interface, host interface, and D/A converter.
The H8/3337 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 H8/3337 Series, there are ZTAT™ versions with on-chip
PROM, and F-ZTAT™ versions 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 H8/3397 Series is only available in a mask-ROM version. For applications with
ZTAT, F-ZTAT, and emulator versions, use the H8/3337 Series instead. In such cases, do
not access registers of deleted functions. Also, do not write 1 to the following bits: HIE bit
of SYSCR; IICS, IICD, IICX, IICE and STAC bits of STCR; RAMS and RAM0 bits of
WSCR.
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 H8/3337 Series.
1
RENESAS [ RENESAS TECHNOLOGY CORP ]
