HD6432633 Datasheet, PDF(106/1453 Page) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

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HD6432633 Datasheet, PDF (106/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

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2.1.4 Differences from H8/300H CPU

In comparison to the H8/300H CPU, the H8S/2600 CPU has the following enhancements.

â¢ Additional control register

ï£§ One 8-bit and two 32-bit control registers have been added

â¢ Enhanced instructions

ï£§ Addressing modes of bit-manipulation instructions have been enhanced

ï£§ A multiply-and-accumulate instruction has been added

ï£§ Two-bit shift instructions have been added

ï£§ Instructions for saving and restoring multiple registers have been added

ï£§ A test and set instruction has been added

â¢ Higher speed

ï£§ Basic instructions execute twice as fast

2.2 CPU Operating Modes

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 (architecturally a maximum 16-Mbyte program area and a maximum of 4 Gbytes for

program and data areas combined). The mode is selected by the mode pins of the microcontroller.

Note: * Not available in the H8S/2633 Series.

Normal mode*

Maximum 64 kbytes, program

and data areas combined

CPU operating modes

Advanced mode

Maximum 16-Mbytes for

program and data areas

combined

Note: * Not available in the H8S/2633 Series.

Figure 2-1 CPU Operating Modes

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