HD6413008VF25 Datasheet, PDF (64/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

2. CPU
⎯ 32 ÷ 16-bit register-register divide:
880 ns@25 MHz
• Two CPU operating modes
⎯ Normal mode
⎯ Advanced mode
• Low-power mode
Transition to power-down state by SLEEP instruction
2.1.2 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
⎯ Advanced mode supports a maximum 16-Mbyte address space.
⎯ Normal mode supports the same 64-kbyte address space as the H8/300 CPU.
• Enhanced addressing
The addressing modes have been enhanced to make effective use of the 16-Mbyte address
space.
• Enhanced instructions
⎯ Data transfer, arithmetic, and logic instructions can operate on 32-bit data.
⎯ Signed multiply/divide instructions and other instructions have been added.
2.2 CPU Operating Modes
The H8/300H CPU has two operating modes: normal and advanced. Normal mode supports a
maximum 64-kbyte address space. Advanced mode supports up to 16 Mbytes.
Normal mode
Maximum 64 kbytes, program
and data areas combined
CPU operating modes
Advanced mode
Maximum 16 Mbytes, program
and data areas combined
Figure 2.1 CPU Operating Modes
Rev.4.00 Aug. 20, 2007 Page 18 of 638
REJ09B0395-0400