Data Configuration - Fujitsu FR60 Hardware Manual

CHAPTER 3 CPU AND CONTROL UNITS
3.4

Data Configuration

This section describes the data structure in FR family microcontrollers.
■ Bit Ordering
FR family microcontrollers use the little endian method for bit ordering.
Figure 3.4-1 shows the data configuration in bit ordering.
bit 31 29
30 28
MSB
■ Byte Ordering
FR family microcontrollers use the big endian method for byte ordering.
Figure 3.4-2 shows the data configuration in byte ordering.
Address n
Address (n+1)
Address (n+2)
Address (n+3)
64
Figure 3.4-1 Data Configuration in Bit Ordering
27 25 23 21 19
26 24 22 20
Figure 3.4-2 Data Configuration in Byte Ordering
Memory
bit
7 0
10101010
11001100
11111111
00010001
17 15 13 11
18 16 14 12 10
MSB
bit 31 23 15
10101010 11001100 11111111 00010001
9 7 5 3 1
8 6 4 2
LSB
7 0
0
LSB