Datasheet

Section 2 CPU
Rev.6.00 Sep. 27, 2007 Page 35 of 1268
REJ09B0220-0600
2.1.3 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 control register, have been added.
• Expanded address space
⎯ 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.
2.1.4 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.