Differences From H8/300 Cpu - Hitachi H8/300H Series Programming Manual

— 8/16/32-bit register-register add/subtract: 125 ns
— 8 × 8-bit register-register multiply: 875 ns
— 16 ÷ 8-bit register-register divide: 875 ns
— 16 × 16-bit register-register multiply: 1375 ns
— 32 ÷ 16-bit register-register divide: 1375 ns
• Two CPU operating modes
— Normal mode
— Advanced mode
• Low-power mode
— Transition to power-down state by SLEEP instruction

1.1.2 Differences from H8/300 CPU

In comparison to the H8/300 CPU, the H8/300H CPU has the following enhancements.
• More general registers
Eight 16-bit registers have been added.
• Expanded address space
Normal mode supports the same 64-kbyte address space as the H8/300 CPU.
Advanced mode supports a maximum 16-Mbyte address space.
• Enhanced addressing
The addressing modes have been enhanced to make effective use of the 16-Mbyte address
space.
• Enhanced instructions
Signed multiply/divide instructions and other instructions have been added.
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