HD6432670 Hitachi, HD6432670 Datasheet - Page 69

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Note: Normal mode is not available in this LSI.
2.1.3
In comparison to the H8/300H CPU, the H8S/2600 CPU has the following enhancements.
2.2
The H8S/2600 CPU has two operating modes: normal and advanced. Normal mode supports a
maximum 64-kbyte address space. Advanced mode supports a maximum 16-Mbyte total address
space. The mode is selected by the mode pins.
2.2.1
The exception vector table and stack have the same structure as in the H8/300 CPU.
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-and-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.
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-and-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.
Differences from H8/300H CPU
CPU Operating Modes
Normal Mode
Rev. 2.0, 04/02, page 23 of 906