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2.1.2
Differences from H8/300 CPU
In comparison to the H8/300 CPU, the H8S/2600 CPU has the following enhancements.
• More general registers and control registers
Eight 16-bit expanded registers, and one 8-bit and two 32-bit control 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
Addressing modes of bit-manipulation instructions have been enhanced.
Signed multiply and divide instructions have been added.
A multiply-accumulate instruction has been added.
Two-bit shift and rotate instructions have been added.
Instructions for saving and restoring multiple registers have been added.
A test and set instruction has been added.
• Higher speed
Basic instructions execute twice as fast.
Note: Normal mode is not available in this LSI.
2.1.3
Differences from H8/300H CPU
In comparison to the H8/300H CPU, the H8S/2600 CPU has the following enhancements.
• Additional control register
One 8-bit and two 32-bit control registers have been added.
• Enhanced instructions
Addressing modes of bit-manipulation instructions have been enhanced.
A multiply-accumulate instruction has been added.
Two-bit shift and rotate instructions have been added.
Instructions for saving and restoring multiple registers have been added.
A test and set instruction has been added.
• Higher speed
Basic instructions execute twice as fast.
Rev. 1.00, 09/03, page 17 of 704
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