SH7041A datasheet(39/923 Pages) RENESAS

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Section 1 SH7040 Series Overview

1.1

SH7040 Series Overview

The SH7040 Series (SH7040/41/42/43/44/45) CMOS single-chip microprocessors integrate a

Renesas-original architecture, high-speed CPU with peripheral functions required for system

configuration.

The CPU has a RISC-type instruction set

. Most instructions can be executed in one clock cycle,

which greatly improves instruction execution speed

. In addition, the 32-bit internal-bus

architecture enhances data processing power. With this CPU, it has become possible to assemble

low cost, high performance/high-functioning systems, even for applications that were previously

impossible with microprocessors, such as real-time control, which demands high speeds. In

particular, the SH7040 series has a 1-kbyte on-chip cache, which allows an improvement in CPU

performance during external memory access.

In addition, the SH7040 Series includes on-chip peripheral functions necessary for system

configuration, such as large-capacity ROM and RAM, timers, a serial communication interface

(SCI), an A/D converter, an interrupt controller, and I/O ports. Memory or peripheral LSIs can be

connected efficiently with an external memory access support function. This greatly reduces

system cost.

In addition to the masked-ROM versions of the SH7040 series, the SH7042 and SH7043 have a

ZTAT™*

1 version with user-programmable on-chip PROM and the SH7044 and SH7045 have an

F-ZTAT

*2 version with on-chip flash memory. These versions enable users to respond quickly

and flexibly to changing application specifications, growing production volumes, and other

conditions.

Notes: *1 ZTAT (Zero Turn-Around Time) is a registered trademark of Renesas Technology

Corp.

*2 F-ZTAT (Flexible ZTAT) is a trademark of Renesas Technology Corp.

1.1.1

SH7040 Series Features

CPU:

• Original Renesas architecture

• 32-bit internal data bus

• General-register machine

 Sixteen 32-bit general registers

 Three 32-bit control registers

 Four 32-bit system registers

• RISC-type instruction set

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