參數(shù)資料
型號(hào)： V30MZ
英文描述： V30MZ(TM) Hardware (Preliminary) | User＇s Manual[01/2002]
中文描述： V30MZ（TM）硬件（初步）|用戶手冊(cè)[01/2002]
文件頁數(shù)： 39/89頁
文件大?。?/td> 418K
代理商： V30MZ
CHAPTER 3 CPU FUNCTIONS
39
3.5 Effective Address
The effective address (EA) is an unsigned 16-bit number and is the memory address to be processed by an
instruction represented by the offset value for the base address of the corresponding segment. This is calculated by
the execution unit (EXU) according to the specification of an instruction operand.
The EXU calculates EA in several different methods (addressing mode). The method is selected by the 2nd byte
operand of the instruction. The information encoded in the 2nd byte of the instruction indicates how the effective
address of the memory indicated by the operand is calculated by the EXU. This operand code is automatically
generated by a compiler or assembler from a program statement or instruction description. All addressing modes are
available in assembly language (Refer to
Section
3.7 Addressing Mode
).
The method of calculation of EA is shown below. Figure 3-9 indicates that the EXU calculates EA by adding the
displacement, base register contents, and index register contents. For any instruction, these three elements can be
combined arbitrarily. The displacement is an 8-bit or 16-bit immediate number indicated by an operand.
Figure 3-9. Memory Address Calculation
0 0
0 0
PS
or
0 0
0 0
SS
0 0
0 0
DS0
or
0 0
0 0
DS1
or
Displacement (16 bits)
IY
or
IX
or
BP
or
BW
Physical address (20 bits)
BP
or
BW
IY
or
IX
Effective address
Encoded
in
instruction
Determined
by
instruction
Uniformity
determined
unless it is
denied by
segment
override
prefix
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
V30N 制造商:Renesas Electronics Corporation 功能描述:
V-30TB 制造商:Mencom 功能描述:
V31 制造商:SMC Corporation of America 功能描述:CONNECTOR
V3-1 功能描述:基本/快動(dòng)開關(guān) 15.1A pin plunger Screw Terminals RoHS:否 制造商:Omron Electronics 觸點(diǎn)形式:SPDT 執(zhí)行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級(jí):IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel
V3-1001 功能描述:基本/快動(dòng)開關(guān) Snap Action SPDT 10A 3.89N Thru-Hole RoHS:否 制造商:Omron Electronics 觸點(diǎn)形式:SPDT 執(zhí)行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級(jí):IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel
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