Datasheet

Section 2 CPU
Rev. 6.00 Mar. 18, 2010 Page 65 of 982
REJ09B0054-0600
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 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.
⎯ 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.
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
⎯ One 8-bit control registers have 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.