SH7021 datasheet(22/509 Pages) RENESAS

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Section 1 Overview

1.1

SuperH Microcomputer Features

The SuperH microcomputer (SH7000 series) is a new generation reduced instruction set computer

(RISC) in which a Hitachi-original CPU and the peripheral functions required for system

configuration are integrated onto a single chip.

The CPU has a RISC-type instruction set. Most instructions can be executed in one clock cycle,

which strikingly improves instruction execution speed. In addition, the CPU has a 32-bit internal

architecture for enhanced data-processing ability. As a result, the CPU enables high-performance

systems to be constructed with advanced functionality at low cost, even in applications such as

realtime control that require very high speeds, an impossibility with conventional microcomputers.

The SH microcomputer includes peripheral functions such as large-capacity ROM, RAM, a direct

memory access controller (DMAC), timers, a serial communication interface (SCI), an interrupt

controller (INTC), and I/O ports. External memory access support functions enable direct

connection to SRAM and DRAM. These features can drastically reduce system cost.

For on-chip ROM, masked ROM or electrically programmable ROM (PROM) can be selected.

The PROM version can be programmed by users with a general-purpose EPROM programmer.

Table 1.1 lists the features of the SH microcomputers (SH7020 and SH7021).

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