Datasheet

Table Of Contents
Section 2 CPU
Rev. 2.00 Jul. 04, 2007 Page 11 of 692
REJ09B0309-0200
Section 2 CPU
This LSI has an H8/300H CPU with an internal 32-bit architecture that is upward-compatible with
the H8/300 CPU. The H8/300H can handle a 16-Mbyte linear address space and is ideal for
realtime control.
Upward-compatible with H8/300 CPUs
Can execute H8/300 CPUs object programs
Additional eight 16-bit extended registers
32-bit transfer and arithmetic and logic instructions are added
Signed multiply and divide instructions are added.
General-register architecture
Sixteen 16-bit general registers also usable as sixteen 8-bit registers and eight 16-bit registers,
or eight 32-bit registers
Sixty-two basic instructions
8/16/32-bit data transfer and arithmetic and logic instructions
Multiply and divide instructions
Powerful bit-manipulation instructions
Eight addressing modes
Register direct [Rn]
Register indirect [@ERn]
Register indirect with displacement [@(d:16,ERn) or @(d:24,ERn)]
Register indirect with post-increment or pre-decrement [@ERn+ or @–ERn]
Absolute address [@aa:8, @aa:16, @aa:24]
Immediate [#xx:8, #xx:16, or #xx:32]
Program-counter relative [@(d:8,PC) or @(d:16,PC)]
Memory indirect [@@aa:8]
16-Mbyte linear address space
High-speed operation
All frequently-used instructions execute in two or four states
8/16/32-bit register-register add/subtract : 2 state
8 × 8-bit register-register multiply : 14 states
16 ÷ 8-bit register-register divide : 14 states
16 × 16-bit register-register multiply : 22 states
32 ÷ 16-bit register-register divide : 22 states