H8SSLASH2214 datasheet(79/936 Pages) RENESAS

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Section 2 CPU

Rev.4.00 Sep. 18, 2008 Page 19 of 872

REJ09B0189-0400

There are also differences in the address space, CCR and EXR register functions, power-down

state, etc., depending on the product.

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, plus 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

Note: * Not available in the H8S/2214 Group.

• 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 and two 32-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

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