H8SLASH3021 datasheet(40/712 Pages) RENESAS

40 / 712 page

2. CPU

Rev.2.00 Mar. 22, 2007 Page 16 of 684

REJ09B0352-0200

• High-speed operation

⎯ All frequently-used instructions execute in two to four states

⎯ Maximum clock frequency: 18 MHz

⎯ 8/16/32-bit register-register add/subtract:

111 ns

⎯ 8 × 8-bit register-register multiply: 778 ns

⎯ 16 ÷ 8-bit register-register divide:

778 ns

⎯ 16 × 16-bit register-register multiply: 1222 ns

⎯ 32 ÷ 16-bit register-register divide: 1222 ns

• Two CPU operating modes

⎯ Normal mode (cannot be used with this LSI)

⎯ Advanced mode

• Low-power mode

Transition to power-down state by SLEEP instruction

2.1.2

Differences from H8/300 CPU

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

• More general registers

Eight 16-bit registers have been added.

• Expanded address space

⎯ Advanced mode supports a maximum 16-Mbyte address space.

⎯ Normal mode supports the same 64-kbyte address space as the H8/300 CPU.

• Enhanced addressing

The addressing modes have been enhanced to make effective use of the 16-Mbyte address

space.

• Enhanced instructions

⎯ Data transfer, arithmetic, and logic instructions can operate on 32-bit data.

⎯ Signed multiply/divide instructions and other instructions have been added.

H8/3021 Datasheet(PDF) 40 Page - Renesas Technology Corp