參數(shù)資料
型號: μPD750100
廠商: NEC Corp.
英文描述: 32 Bit Single Chip Microcontrollers(32位單片微控制器)
中文描述: 32位單片機微控制器(32位單片微控制器)
文件頁數(shù): 26/66頁
文件大?。?/td> 417K
代理商: ΜPD750100
μ
PD705100
26
10. ADDRESS SPACE
The V830 supports 4G-byte linear address spaces for both the memory space and I/O space. It assigns 32-bit
addresses to the memory space. The maximum address is 2
32
– 1. It also assigns 32-bit addresses to the I/O space.
Byte data aligned with each address is defined such that bits 0 and 7 are the LSB and MSB, respectively. If data
consists of multiple bytes, it is defined such that the byte data at the low-order address contains the LSB and that
at the high-order address contains the MSB (little-endian ordering), unless specified otherwise.
According to V830 terminology, data arranged in two-byte format is called halfword data, while that arranged in
four-byte format is called word data. For data consisting of multiple bytes, the low-order address on the right and the
high-order address on the left, as indicated below.
7
0
A
15
8
7
0
A + 1
A
31
24 23
16 15
8
7
0
A + 3
A + 2
A
A + 1
Byte at address A
Data
Address
Data
Address
Data
Address
Halfword at address A
Word at address A
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