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ST40RA Fiches technique(PDF) 7 Page - STMicroelectronics

No de pièce ST40RA
Description  32-bit Embedded SuperH Device
Download  94 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST40RA Fiches technique(HTML) 7 Page - STMicroelectronics

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4 Architecture
ST40RA
7/94
STMicroelectronics
ADCS 7260755H
4
Architecture
4.1
Overview
The ST40RA combines an SH-4, 32-bit microprocessor with a wide range of interfaces to external
peripherals. This section briefly describes each of the features of the ST40RA.
4.2
ST40 system
4.2.1
SuperH ST40 SH-4 core
Figure 1 illustrates the system architecture of the ST40 SH-4 core. The following section briefly
describes the features and performance of the core.
Central processing unit
The central processing unit is built around a 32-bit RISC, two-way superscalar architecture.
Operating at 166 MHz it runs with high code density using fixed length 16-bit instructions. It has a
load/store architecture, delayed branch instruction capability and an on-chip multiplier. It uses a
five-stage pipeline.
Figure 1: ST40 SH-4 core architecture
CPU
UBC
FPU
ICache 8 Kbytes
ITLB
UTLB
Cache and TLB
controller
DCache 16 Kbytes
Lower 32-bit data
Lower 32-bit data


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