Differences From H8/300H Cpu; Cpu Operating Modes; Advanced Mode - Renesas H8S Series Hardware Manual

16-bit single-chip microcomputer

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Differences from H8/300H CPU

In comparison to the H8/300H CPU, the H8S/2000 CPU has the following enhancements.

• Additional control register

 One 8-bit control register has been added.

• Enhanced instructions

 Addressing modes of bit-manipulation instructions have been enhanced.

 Two-bit shift 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.

The H8S/2357 Group CPU has advanced operating mode. 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.

Address Space: Linear access is provided to a 16-Mbyte maximum address space (architecturally a maximum 16-Mbyte

program area and a maximum 4-Gbyte data area, with a maximum of 4 Gbytes for program and data areas combined).

Extended Registers (En): The extended registers (E0 to E7) can be used as 16-bit registers, or as the upper 16-bit

segments of 32-bit registers or address registers.

Instruction Set: All instructions and addressing modes can be used.

Rev.6.00 Oct.28.2004 page 23 of 1016

REJ09B0138-0600H