dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 65

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

The contents of the address modifier register, Mn, defines the type of arithmetic to be per-
formed for addressing mode calculations. For modulo arithmetic, the contents of Mn also
specifies the modulus, or the size of the memory buffer whose addresses will be refer-
enced. See Table 4-2 for a summary of the address modifiers implemented on the
MOTOROLA
Assembler Syntax: (Rn+Nn)
Memory Spaces: P:, X:, Y:, L:
Additional Instruction Execution Time (Clocks): 2
Additional Effective Address Words: 0
EXAMPLE: MOVE Y1,X: (R6+N6)
47
23
6 2 1
Figure 4-9 Address Register Indirect — Indexed by Offset Nn
Y1
BEFORE EXECUTION
0
$6004
$6000
0
24 23
9
0 23
Freescale Semiconductor, Inc.
23
B
X X X X X X
X X X X X X
For More Information On This Product,
M6
R6
N6
ADDRESS GENERATION UNIT
X MEMORY
A
15
15
15
4
Y0
$FFFF
$6000
$0004
Go to: www.freescale.com
C
2
ADDRESSING
0
2
0
0
0
0
0
+
47
23
6 2
Y1
1 0
AFTER EXECUTION
$6004
$6000
0
24 23
0 23
9
23
$ 6 2 1 0 0 9
X X X X X X
B
M6
R6
N6
X MEMORY
A
15
15
15
4
Y0
$FFFF
$6000
$0004
C 2
4 - 15
0
0
0
0
0
2
0