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(jī)微控制器(16/32位單片微控制器)
文件頁數(shù): 117/141頁
文件大?。?/td> 374K
代理商: ΜPD70F3003
105
CHAPTER 8 PIPELINE
8.2.4 Multiply instructions
[Instructions]
MULH, MULHI
[Pipeline]
(1) When next instruction is not multiply instruction
(2) When next instruction is multiply instruction
[Description]
The pipeline consists of 5 stages, IF, ID, EX1, EX2, and WB. There is no MEM stage. The EX
stage requires 2 clocks, but the EX1 and EX2 stages can operate independently. Therefore,
the number of clocks for instruction execution is always 1, even if several multiply instructions
are executed in a row. However, if an instruction using the execution result is placed
immediately after a multiply instruction, data wait time occurs. For details, see Section
8.3
Pipeline Disorder
.
8.2.5 Divide instruction
[Instructions]
DIVH
[Pipeline]
– : Idle inserted for wait
[Description]
The pipeline consists of 40 stages, IF, ID, EX1 to EX36, MEM, and WB. The EX stage requires
36 clocks. No operation is performed in the MEM stage, because memory is not accessed.
8.2.6 Logical operation instructions
[Instructions]
NOT, OR, ORI, XOR, XORI, AND, ANDI, TST, SHR, SAR, SHL
[Pipeline]
[Description]
The pipeline consists of 5 stages, IF, ID, EX, MEM, and WB. No operation is performed in the
MEM stage, because memory is not accessed.
IF
ID
IF
EX1
ID
EX2
EX
WB
MEM
WB
Multiply instruction
Next instruction
1
2
3
4
5
6
Multiply instruction 1
Multiply instruction 2
IF
ID
IF
EX1
ID
EX2
EX1
WB
EX2
WB
1
2
3
4
5
6
1
2
3
4
Divide instruction
Next instruction
Next to next instruction
IF
ID
IF
EX1
EX2
38
39
40
EX35
EX36
ID
IF
MEM
EX
ID
WB
MEM
EX
WB
MEM
WB
37
41
42
IF
ID
IF
EX
ID
MEM
EX
WB
MEM
WB
Logical operation
instruction
Next instruction
1
2
3
4
5
6
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