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| 型號(hào)： | 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(yè)數(shù)： | 24/166頁(yè) |
| 文件大?。?/td> | 772K |
| 代理商： | UPD70433R-12 |
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24
μ
PD70433
3.5
MEMORY SPACE
The V55PI has a 16M-byte memory space. Of this, using lowest 1M bytes (000000H to 0FFFFFH) as the basic memory
space, the 16M bytes including the basic memory space (000000H to FFFFFFH) can be accessed as the extended memory
space. The basic memory space can be accessed using the segment registers (PS, SS, DS0, DS1) in the same way as
in the V25 and V35. The extended memory space can be accessed using the extended segment registers (DS2, DS3), and
has the basic memory space mapped onto the lowest 1M bytes. See
3.2.4 "Segment Registers (PS, SS, DS0, DS1)"
and
3.2.5 "Extended Segment Registers (DS2, DS3)"
for the physical addresses.
The 496-byte space 0FFE00H to 0FFFEFH has mapped onto it a group of registers to which specific functions are
allocated such as on-chip peripheral hardware registers, control registers, etc., and these are manipulated by memory
accesses.
In addition, independent of these, there is a 512-byte register file space (in on-chip RAM). In addition to being accessed
by using register manipulation instructions as in the V25 and V35, the register file space can also be accessed as data
memory by adding a special prefix instruction (IRAM:) to a memory manipulation in.
Figure 3-2. Memory Space
3.5.1
Basic Memory Space
The memory space comprises a 1M-byte basic memory space and 16M-byte extended memory space. The basic memory
space is mapped onto the lowest 1M bytes (000000H to 0FFFFFH) of the extended memory space.
The 1M-byte basic memory space is shown in Figure 3-3.
Conditions for accessing the basic memory space by software are the same as for the V20/V30 and V25/V35.
A basic memory space physical address is specified by the segment start address indicated by the segment register (PS,
SS, DS0, DS1) and the offset value from the segment start position indicated by another register or immediate data.
The basic memory space has the vectored interrupt vector area and special function register area mapped onto it. For
an area in which special function registers are mapped, data accesses cannot be made to external memory (program fetches
are possible.)
0 0 0 0 0 0 H
0 F F F F F H
1 0 0 0 0 0 H
F F F F F F H
0 0 3 F F H
F F E 0 0 H
F F F E F H
Basic Memory
Space
(1M Bytes)
Vector Area
Extended Memory
Space (16M Bytes)
Special Function
Register Area
(On-Chip Area)
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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