參數(shù)資料
型號: μPD703008
廠商: NEC Corp.
英文描述: 16/32 Bit RISC Microcontrollers(16/32位RISC微控制器)
中文描述: 16/32位RISC微控制器(16/32位的RISC微控制器)
文件頁數(shù): 125/141頁
文件大小: 374K
代理商: ΜPD703008
113
CHAPTER 8 PIPELINE
(2) Not V850 family (Other than Harvard architecture)
The MEM stage of instruction 1 and the IF stage of instruction 4, in addition to the MEM stage of instruction 2
and the IF stage of instruction 5 are in contention, causing path waiting to occur and slower execution time due
to disorderly pipeline operation.
– : Idle inserted for wait
8.4 Additional Items Related to Pipeline
8.4.1 Harvard architecture
The V850 family uses the Harvard architecture to operate an instruction fetch path from internal ROM and a memory
access path to internal RAM independently. This eliminates path arbitration conflicts between the IF and MEM stages
and allows orderly pipeline operation.
(1) V850 family (Harvard architecture)
The MEM stage of instruction 1 and the IF stage of instruction 4, as well as the MEM stage of instruction 2 and
the IF stage of instruction 5 can be executed simultaneously with orderly pipeline operation.
IF
ID
IF
EX
ID
IF
MEM
EX
ID
IF
WB
MEM
EX MEM
ID
Instruction 1
Instruction 2
Instruction 3
Instruction 4
Instruction 5
EX
ID
IF
WB
WB
MEM
WB
MEM
EX
WB
1
2
3
4
5
6
7
8
9
IF
ID
IF
EX
ID
IF
MEM
MEM
– ID
Instruction 1
Instruction 2
Instruction 3
Instruction 4
Instruction 5
ID
IF
EX
EX
ID
WB
EX
IF
EX
1
2
3
4
5
6
7
8
9
10
WB
MEM
MEM
MEM
11
WB
WB
WB
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