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Section 1 Overview
1.1
Overview
The H8S/2678 Series comprises microcomputers (MCUs), built around the H8S/2600 CPU,
employing Hitachi’s original architecture, and equipped with on-chip supporting functions
necessary for system configuration.
The H8S/2600 CPU has an internal 32-bit architecture, is provided with sixteen 16-bit general
registers and a concise, optimized instruction set designed for high-speed operation, and can
address a 16-Mbyte linear address space. The instruction set is upward-compatible with H8/300
and H8/300H CPU instructions at the object-code level, facilitating migration from the H8/300,
H8/300L, or H8/300H Series.
On-chip supporting functions required for system configuration include direct memory access
controller (DMAC), EXDMA controller (EXDMAC), and data transfer controller (DTC) bus
masters, ROM and RAM memory, a16-bit timer pulse unit (TPU), programmable pulse generator
(PPG), 8-bit timer module (TMR), watchdog timer module (WDT), serial communication
interfaces (SCI, IrDA), A/D converter, D/A converter, and I/O ports.
A high-functionality bus controller is also provided, enabling fast and easy connection of DRAM
and other kinds of memory.
The on-chip ROM is either single-power-supply flash memory (F-ZTAT™*) or mask ROM,
enabling users to respond quickly and flexibly to changing application specifications, growing
production volumes, and other conditions. The ROM is connected to the CPU via a 16-bit data
bus, enabling both byte and word data to be accessed in one state. Instruction fetching is thus
speeded up, and processing speed increased.
The features of the H8S/2678 Series are shown in table 1.1.
Note: * F-ZTAT is a trademark of Hitachi, Ltd.
Содержание H8S/2670
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