HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 50

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

3.1 Overview
The H8/532 chip has the H8/500 Family CPU: a high-speed central processing unit designed for
realtime control of a wide range of medium-scale office and industrial equipment. Its Hitachi-
original architecture features eight 16-bit general registers, internal 16-bit data paths, and an
optimized instruction set.
Section 3 summarizes the CPU architecture and instruction set.
3.1.1 Features
The main features of the H8/500 CPU are listed below.
• General-register machine
• High speed: maximum 10MHz
• Address space managed in 64k-byte pages, expandable to 1M byte*
• Two CPU operating modes:
• Highly orthogonal instruction set
• 1.5 Addressing modes
• Optimized for efficient programming in C language
* The CPU architecture supports up to 16M bytes of external memory, but the H8/532 chip has
— Eight 16-bit general registers
— Seven control registers (two 16-bit registers, five 8-bit registers)
— Minimum mode: Maximum 64k-byte address space
— Maximum mode: Maximum 1M-byte address space*
At 10MHz a register-register add operation takes only 200ns.
Page registers make four pages available simultaneously: a code page, stack page, data page,
and extended page.
Addressing modes and data sizes can be specified independently within each instruction.
Register-register and register-memory operations are supported.
In addition to the general registers and orthogonal instruction set, the CPU has special short
formats for frequently-used instructions and addressing modes.
only enough address pins to address 1M byte.
Section 3 CPU
31