參數(shù)資料
型號: UPD70320GJ-8-5BG
廠商: NEC Corp.
英文描述: V25TM 16/8-BIT SINGLE-CHIP MICROCONTROLLER
中文描述: V25TM 16/8-BIT單片機
文件頁數(shù): 14/74頁
文件大?。?/td> 439K
代理商: UPD70320GJ-8-5BG
14
μ
PD70320
Table 2-6. Segment Register Selection
sreg
00
DS1
01
PS
10
SS
11
DS0
The number of clocks, for memory operand, differs among addressing modes. So, use the following values for
“EA” items shown in
Table 2-8 Number of Clocks
.
Table 2-7. Number of Clocks for Each Memory Addressing
mod
mem
00
Clocks
01
Clocks
10
Clocks
000
BW + IX
3
BW + IX + disp8
3
BW + IX + disp16
4
001
BW + IY
3
BW + IY + disp8
3
BW + IY + disp16
4
010
BP + IX
3
BP + IX + disp8
3
BP + IX + disp16
4
011
BP + IY
3
BP + IY + disp8
3
BP + IY + disp16
4
100
IX
3
IX + disp8
3
IX + disp16
4
101
IY
3
IY + disp8
3
IY + disp16
4
110
Direct address
3
BP + disp8
3
BP + disp16
4
111
BW
3
BW + disp8
3
BW + disp16
4
“T” indicates the number of wait states. Use any number of waits starting at “0” (no wait).
The instruction fetch cycle is not counted as the number of clocks.
There are some branch instructions for which such description as the example below is provided.
The description indicates as follows:
Example
15/8 ···15: the number of clock cycles when branched
8: the number of clock cycles when not branched
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