參數(shù)資料
型號: μPD70F3003
廠商: NEC Corp.
英文描述: 16/32 Bit Single Chip Microcontrollers(16/32 位單片微控制器)
中文描述: 16/32位單片機(jī)微控制器(16/32位單片微控制器)
文件頁數(shù): 26/141頁
文件大小: 374K
代理商: ΜPD70F3003
CHAPTER 3 DATA TYPE
14
(3) Word (WORD)
A word is 4-byte (32-bit) contiguous data that starts from any word boundary
Note
. Each bit is assigned a number
from 0 to 31. The LSB is bit 0 and the MSB is bit 31. A word is specified by its address A (with the 2 lowest
bits fixed to 0), and occupies 4 bytes A, A+1, A+2, and A+3.
(4) Bit (BIT)
A bit is 1-bit data at the nth bit position in 8-bit data that starts from any byte boundary
Note
. A bit is specified by
its address A and bit number n.
Note
Refer to
3.3 Data Alignment
.
3.2 Data Representation
3.2.1 Integer
With the V850 family, an integer is expressed as a binary number of 2’s complement and is 8, 16, or 32 bits long.
Regardless of its length, the bit 0 of an integer is the least significant bit. The higher the bit number, the more significant
the bit. Because 2’s complement is used, the most significant bit is used as a sign bit.
Data Length
Range
Byte
8 bits
–128 to +127
Half-word
16 bits
–32768 to +32767
Word
32 bits
–2147483648 to +2147483647
Data
0
7
Address
A
8
15
A+1
A+2
A+3
16
23
24
31
Data
0
n
Address
A
7
Bit number
Byte of address A
· · · · · · · · · · · · · · · · · · · · · · · ·
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