參數(shù)資料
型號: μPD70F3003
廠商: NEC Corp.
英文描述: 16/32 Bit Single Chip Microcontrollers(16/32 位單片微控制器)
中文描述: 16/32位單片機微控制器(16/32位單片微控制器)
文件頁數(shù): 119/141頁
文件大?。?/td> 374K
代理商: ΜPD70F3003
107
CHAPTER 8 PIPELINE
(2) Unconditional branch instructions
[Instructions]
JMP, JR, JARL, BR
[Pipeline]
IF x
WB
Note
:
:
Instruction fetch that is not executed
No operation is performed in the case of the JMP instruction,
JR instruction, and BR instruction, but in the case of the JARL
instruction, data is written to the restore PC.
[Description]
The pipeline consists of 5 stages, IF, ID, EX, MEM, and WB. However, no operation is performed
in the MEM and WB stages, because memory is not accessed and no data is written to registers.
However, in the case of the JARL instruction, data is written to the restore PC in the WB stage.
Also, the IF stage of the next instruction of the branch instruction is not executed.
8.2.9 Bit manipulation instructions
(1) SET1, CLR1, NOT1
[Pipeline]
– : Idle inserted for wait
[Description]
The pipeline consists of 8 stages, IF, ID, EX1, MEM, EX2, EX3, MEM, and WB. However, no
operation is performed in the WB stage, because no data is written to registers.
In the case of these instructions, the memory access is read modify write, and the EX and MEM
stages require 3 and 2 clocks, respectively.
IF
ID
IF
×
EX
MEM
WB
Note
Unconditional branch
instruction
Next instruction
Branch destination instruction
IF
ID
EX
MEM
WB
1
2
3
4
5
6
7
8
Next instruction
Next to next instruction
IF
ID
IF
EX1
MEM
ID
IF
EX3
MEM
EX
ID
WB
MEM
EX
WB
MEM
WB
EX2
1
2
3
4
5
6
7
8
9
10
SET1, CLR1, NOT1
instruction
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