参数资料
型号: ST40RA200XH6E
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 200 MHz, RISC PROCESSOR, PBGA372
封装: 27 X 27 MM, 2.33 MM HEIGHT, PLASTIC, BGA-372
文件页数: 13/94页
文件大小: 2144K
代理商: ST40RA200XH6E
20/92
ST40RA
4 Architecture
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 2 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 2: ST40 SH-4 core architecture
CPU
UBC
FPU
ICache 8 Kbytes
ITLB
UTLB
Cache and TLB
controller
DCache 16 Kbytes
29
bit
ad
d
32bit
data
3
2bit
d
a
ta
32-bit
add
(instruction
)
32-bit
data
(instruction)
32-b
it
add
ress
(data)
32-b
it
data
(load)
32-it
data
(store)
Lower 32-bit data
64-bit
data
(store
)
Upper
3
2
-bit
data
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