參數(shù)資料
型號: M32180F8VFP
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 64 MHz, RISC MICROCONTROLLER, PQFP240
封裝: 32 X 32 MM, 0.50 MM PITCH, PLASTIC, QFP-240
文件頁數(shù): 82/139頁
文件大小: 3774K
代理商: M32180F8VFP
2
2-10
32180 Group User’s Manual (Rev.1.0)
CPU
2.6 Data Formats
Bit endian
(H'01)
Byte endian
(H'01234567)
Big endian
Little endian
Note: Even when bits are arranged in big endian, H'01 is not B'10000000.
HH
HL
LH
LL
H'01
H'23
H'45
H'67
LL
LH
HL
HH
H'67
H'45
H'23
H'01
B'0000001
b0
b7
B'0000001
b7
b0
Figure 2.6.4 General Endian System
(2) Data formats in memory
The data sizes in memory can be byte (8 bits), halfword (16 bits) or word (32 bits). Although byte data can
be located at any address, halfword and word data must be located at the addresses aligned with a
halfword boundary (least significant address bit = "0") or a word boundary (two low-order address bits =
"00"), respectively. If an attempt is made to access memory data that overlaps the halfword or word bound-
ary, an address exception occurs.
Figure 2.6.3 Data Formats in Memory
(3) Endian
The diagrams below show a general endian system and the endian adopted for the M32R family of
Mitsubishi microcomputers.
Address
Byte
Halfword
Word
+0 address
+1 address
+2 address
+3 address
b0
b31
Byte
Halfword
Word
7
8
15 16
23 24
b0
15
b0
b31
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