參數(shù)資料
型號： UPD70433R-12
廠商： NEC Corp.
元件分類： 16位微控制器
英文描述： V55PITM 16-BIT MICROPROCESSOR
中文描述： V55PITM 16位微處理器
文件頁數(shù)： 20/166頁
文件大?。?/td> 772K
代理商： UPD70433R-12
20
μ
PD70433
3.2.3
Pointers (SP, BP) and Index Registers (IX, IY)
These are 16-bit registers used as base pointers or index registers in memory accesses using based addressing (BP),
indexed addressing (IX, IY), based indexed addressing (BP, IX, IY), etc. The SP is also used as the pointer in stack
operations. As with general registers, these are used with transfer instructions, arithmetic operation instructions, etc., but
in this case they cannot be used as 8-bit registers. Each register is also used as the fixed address pointer for specific
instruction processing, as shown below.
SP : Stack manipulation
IX : Block transfers, BCD operation source side address specification
IY : Block transfers, BCD operation destination side address specification
These registers are mapped onto the register file space (in on-chip RAM). The address is the value obtained by adding
the offset for each register to (register bank number
×
32).
Table 3-2. Pointer and Index Register Offsets
Register
Offset
SP
16H
BP
14H
IX
12H
IY
10H
3.2.4
Segment Registers (PS, SS, DS0, DS1)
The CPU manages the 1M-byte basic memory space by dividing it into 64K-byte units. The CPU specifies the start
address of each segment with a segment register, and uses another register or effective address for the specification of
phyiscal address, with the relative address from the start address as the offset.
The physical address is created as shown below.
Segment Register 4-Bit Fixed
x
x
x
x
0
H
0
x
x
x
x
H
x
x
x
x
x
H
+
There are four segment registers: PS (Program Segment), SS (Stack Segment), DS0 (Data Segment 0), and DS1 (Data
Segment 1). The respective segments are used in the following cases.
PS : Program fetch
SS : Stack manipulation instructions, addressing using BP as base register
DS0 : General variable accesses, source block data accesses such as block transfer instructions, etc.
DS1 : Destination block data accesses such as block transfer instructions, etc.
....
Segment Start Address
....
Offset Value
.....
Physical Address (20 Bits)
相關(guān)PDF資料
PDF描述
UPD70433R-16 V55PITM 16-BIT MICROPROCESSOR
UPD70433GD-12-5BB V55PITM 16-BIT MICROPROCESSOR
UPD70433GD-16-5BB V55PITM 16-BIT MICROPROCESSOR
UPD70433GJ-12-3EB V55PITM 16-BIT MICROPROCESSOR
UPD70433GJ-16-3EB V55PITM 16-BIT MICROPROCESSOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD70433R-16 制造商:NEC 制造商全稱:NEC 功能描述:V55PITM 16-BIT MICROPROCESSOR
UPD705100 制造商:NEC 制造商全稱:NEC 功能描述:V830TM 32-BIT MICROCONTROLLER
UPD705100GJ-100-8 制造商:NEC 制造商全稱:NEC 功能描述:V830TM 32-BIT MICROCONTROLLER
UPD705100GJ-100-8EU 制造商:NEC 制造商全稱:NEC 功能描述:V830TM 32-BIT MICROCONTROLLER
UPD705101 制造商:NEC 制造商全稱:NEC 功能描述:32-BIT MICROPROCESSOR
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