Table of Contents
Advertisement
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, optimized 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: 0.4 μs*
8 × 8-bit multiply:
16 ÷ 8-bit divide:
Note: * These values are at φ = 5 MHz.
• Low-power operation modes
SLEEP instruction for transfer to low-power operation
Section 2 CPU
2.8 μs*
2.8 μs*
Rev.3.00 Jul. 19, 2007 page 27 of 532
REJ09B0397-0300
2. CPU
Advertisement
Table of Contents
