Hitachi SH7032 Hardware Manual page 37

Table 1.1 Features of the SH7032 and SH7034 Microcomputers
Feature
CPU
Operating modes
2
Description
Original Hitachi architecture
32-bit internal data paths
General-register machine:
•
Sixteen 32-bit general registers
•
Three 32-bit control registers
•
Four 32-bit system registers
RISC-type instruction set:
•
Instruction length: 16-bit fixed length for improved code efficiency
•
Load-store architecture (basic arithmetic and logic operations are
executed between registers)
•
Delayed unconditional branch instructions reduce pipeline disruption
•
Instruction set optimized for C language
Instruction execution time: one instruction/cycle (50 ns/instruction at 20-
MHz operation)
Address space: 4 Gbytes available in the architecture
On-chip multiplier: multiplication operations (16 bits × 16 bits → 32 bits)
executed in 1–3 cycles, and multiplication/accumulation operations (16
bits × 16 bits + 42 bits → 42 bits) executed in 2–3 cycles
Five-stage pipeline
Operating modes:
• On-chip ROMless mode
• On-chip ROM mode (SH7034 only)
Processing states:
•
Power-on reset state
•
Manual reset state
•
Exception handling state
•
Program execution state
•
Power-down state
•
Bus-released state
Power-down states:
•
Sleep mode
•
Software standby mode