Section 1 Overview
Rev. 3.00 Sep. 27, 2007 Page 2 of 758
REJ09B0243-0300
Table 1.1
Features
Items Specification
CPU
•
Central processing unit with an internal 32-bit RISC (Reduced
Instruction Set Computer) architecture
•
Instruction length: 16-bit fixed length for improved code efficiency
•
Load-store architecture (basic operations are executed between
registers)
•
Sixteen 32-bit general registers
•
Five-stage pipeline
•
On-chip multiplier: Multiplication operations (32 bits
×
32 bits
→
64 bits)
executed in two to five cycles
•
C language-oriented 62 basic instructions
Note:
Some specifications on slot illegal instruction exception handling
in this LSI differ from those of the conventional SH-2. For details,
see section 5.8.4, Notes on Slot Illegal Instruction Exception
Handling.
Operating modes
•
Operating modes
Single chip mode
•
Operating states
Program execution state
Exception handling state
•
Power-down modes
Sleep mode
Software standby mode
Module standby mode
User break controller
(UBC)
•
Addresses, data values, type of access, and data size can all be set as
break conditions
•
Supports a sequential break function
•
Two break channels
On-chip ROM
•
128 kbytes (SH71253, SH71243)
•
64 kbytes (SH71252, SH71242)
•
32 kbytes (SH71241)
On-chip RAM
•
8 kbytes
Содержание SH7124 R5F7124
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