70291E Datasheet, PDF (71/436 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
FIGURE 4-8:
BIT-REVERSED ADDRESS EXAMPLE
Sequential Address
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 0
Bit Locations Swapped Left-to-Right
Around Center of Binary Value
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b1 b2 b3 b4 0
Bit-Reversed Address
Pivot Point
XB = 0x0008 for a 16-Word Bit-Reversed Buffer
TABLE 4-41:
A3
A2
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
BIT-REVERSED ADDRESS SEQUENCE (16-ENTRY)
Normal Address
Bit-Reversed Address
A1
A0
Decimal
A3
A2
A1
A0
Decimal
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
8
1
0
2
0
1
0
0
4
1
1
3
1
1
0
0
12
0
0
4
0
0
1
0
2
0
1
5
1
0
1
0
10
1
0
6
0
1
1
0
6
1
1
7
1
1
1
0
14
0
0
8
0
0
0
1
1
0
1
9
1
0
0
1
9
1
0
10
0
1
0
1
5
1
1
11
1
1
0
1
13
0
0
12
0
0
1
1
3
0
1
13
1
0
1
1
11
1
0
14
0
1
1
1
7
1
1
15
1
1
1
1
15
© 2011 Microchip Technology Inc.
DS70291E-page 71