Datasheet

Rev. 3.00, 03/04, page 17 of 830

2.1.2 Differences from H8/300 CPU

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

• More general registers and control registers

 Eight 16-bit extended registers and one 8-bit control register have been added.

• Extended address space

 Normal mode* supports the same 64 kbytes address space as the H8/300 CPU.

 Advanced mode supports a maximum 16 Mbytes address space.

Note: * Not available in this LSI.

• Enhanced addressing

 The addressing modes have been enhanced to make effective use of the 16 Mbytes address

space.

• Enhanced instructions

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

 Signed multiply and divide instructions have been added.

 Two-bit shift and two-bit 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 are executed twice as fast.

2.1.3 Differences from H8/300H CPU

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

• Additional control register