HD6473032F16 Datasheet, PDF (49/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 2 CPU
Section 2 CPU
2.1 Overview
The H8/300H CPU is a high-speed central processing unit with an internal 32-bit architecture that
is upward-compatible with the H8/300 CPU. The H8/300H CPU has sixteen 16-bit general
registers, can address a 16-Mbyte linear address space, and is ideal for realtime control.
2.1.1 Features
The H8/300H CPU has the following features.
• Upward compatibility with H8/300 CPU
Can execute H8/300 Series object programs
• General-register architecture
Sixteen 16-bit general registers (also usable as sixteen 8-bit registers or eight 32-bit registers)
• Sixty-two basic instructions
 8/16/32-bit data transfer and arithmetic and logic instructions
 Multiply and divide instructions
 Powerful bit-manipulation instructions
• Eight addressing modes
 Register direct [Rn]
 Register indirect [@ERn]
 Register indirect with displacement [@(d:16, ERn) or @(d:24, ERn)]
 Register indirect with post-increment or pre-decrement [@ERn+ or @–ERn]
 Absolute address [@aa:8, @aa:16, or @aa:24]
 Immediate [#xx:8, #xx:16, or #xx:32]
 Program-counter relative [@(d:8, PC) or @(d:16, PC)]
 Memory indirect [@@aa:8]
• 16-Mbyte linear address space
• High-speed operation
 All frequently-used instructions execute in two to four states
 Maximum clock frequency:
25 MHz
 8/16/32-bit register-register add/subtract: 80 ns
 8 × 8-bit register-register multiply:
560 ns
 16 ÷ 8-bit register-register divide:
560 ns
Rev. 3.00 Mar 21, 2006 page 19 of 814
REJ09B0302-0300