參數(shù)資料
型號: μPD703008
廠商: NEC Corp.
英文描述: 16/32 Bit RISC Microcontrollers(16/32位RISC微控制器)
中文描述: 16/32位RISC微控制器(16/32位的RISC微控制器)
文件頁數(shù): 25/141頁
文件大?。?/td> 374K
代理商: ΜPD703008
CHAPTER 3 DATA TYPE
3.1 Data Format
The V850 family supports the following data types:
Integer (8, 16, 32 bits)
Unsigned integer (8, 16, 32 bits)
Bit
3.1.1 Data type and addressing
The V850 family supports three types of data lengths: word (32 bits), half-word (16 bits), and byte (8 bits). Byte
0 of any data is always the least significant byte (this is called little endian) and shown at the rightmost position in
figures throughout this manual. The following paragraphs describe the data format where data of fixed length is in
memory.
(1) Byte (BYTE)
A byte is 8-bit contiguous data that starts from any byte boundary
Note
. Each bit is assigned a number from 0 to
7. The LSB (Least Significant Bit) is bit 0 and the MSB (Most Significant Bit) is bit 7. A byte is specified by its
address A.
(2) Half-word (HALF-WORD)
A half-word is 2-byte (16-bit) contiguous data that starts from any half-word boundary
Note
. Each bit is assigned
a number from 0 to 15. The LSB is bit 0 and the MSB is bit 15. A half-word is specified by its address A (with
the lowest bit fixed to 0), and occupies 2 bytes A and A+1.
Data
0
7
Address
A
Data
0
7
Address
A
8
15
A+1
13
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