HD64F38024HV Datasheet, PDF (47/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 2 CPU
Section 2 CPU
2.1 Overview
The H8/300L CPU has sixteen 8-bit general registers, which can also be paired as eight 16-bit
registers. Its concise instruction set is designed for high-speed operation.
2.1.1 Features
Features of the H8/300L CPU are listed below.
• General-register architecture
Sixteen 8-bit general registers, also usable as eight 16-bit general registers
• Instruction set with 55 basic instructions, including:
⎯ Multiply and divide instructions
⎯ Powerful bit-manipulation instructions
• Eight addressing modes
⎯ Register direct
⎯ Register indirect
⎯ Register indirect with displacement
⎯ Register indirect with post-increment or pre-decrement
⎯ Absolute address
⎯ Immediate
⎯ Program-counter relative
⎯ Memory indirect
• 64-Kbyte address space
• High-speed operation
⎯ All frequently used instructions are executed in two to four states
⎯ High-speed arithmetic and logic operations
⎯ 8- or 16-bit register-register add or subtract: 0.25 µs*
⎯ 8 × 8-bit multiply:
1.75 µs*
⎯ 16 ÷ 8-bit divide:
1.75 µs*
Note: * These values are at φ = 8 MHz.
• Low-power operation modes
SLEEP instruction for transfer to low-power operation
Rev. 8.00 Mar. 09, 2010 Page 25 of 658
REJ09B0042-0800