參數(shù)資料
型號： NS32FX164V-25
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 數(shù)字信號處理
英文描述： Advanced Imaging/Communication Signal Processors
中文描述： 16-BIT, 50 MHz, MIXED DSP, PQCC68
封裝： PLASTIC, LCC-68
文件頁數(shù)： 47/102頁
文件大?。?/td> 1053K
代理商： NS32FX164V-25
3.0 Functional Description
(Continued)
Operation:
à
X.ADDR
4
&X
[
1
]
;
ó
Note:
Accumulator is not affected.
INCYDIncrement Y Vector Pointer
The INCY instruction increments the Y vector pointer by one
element, according to the increment and the wrap.
Syntax:
EXEC INCY
15
11 10
0
10000
100 0101 1011
Operation:
à
Y.ADDR
4
&Y
[
1
]
;
ó
Note:
Accumulator is not affected.
INCZDIncrement Z Vector Pointer
The INCZ instruction increments the Z vector pointer by one
element, according to the increment and the wrap.
Syntax:
EXEC INCZ
15
11 10
0
10000
100 0101 1101
Operation:
à
Z.ADDR
4
&Z
[
1
]
;
ó
Note:
Accumulator is not affected.
DECXDDecrement X Vector Pointer
The DECX instruction decrements the X vector pointer by
one element, according to the increment and the wrap.
Syntax:
EXEC DECX
15
11 10
0
10000
101 0010 1101
Operation:
à
X.ADDR
4
&X
[
b
1
]
ó
Note:
Accumulator is not affected.
DECYDDecrement Y Vector Pointer
The DECY instruction decrements the Y vector pointer by
one element, according to the increment and the wrap.
Syntax:
EXEC DECY
15
11 10
0
10000
101 0010 1111
Operation:
DECY
à
Y.ADDR
4
&Y
[1
1
]
;
ó
Note:
Accumlator is not affected.
DECZDDecrement Z Vector Pointer
The DECZ instruction decrements the Z vector by one ele-
ment, according to the increment and the wrap.
Syntax:
EXEC DECZ
15
11 10
0
10000
101 0011 0001
Operation:
à
Z.ADDR
4
&Z
[1
1
]
;
ó
Note:
Accumulator is not affected.
3.4.5.7 Flow Control Instructions
NOPRDNo Operation
The NOPR command passes control to the next command
in the command list. No operation is performed.
Syntax:
NOPR
15
11 10
0
11010
00000000
Note:
Accumulator is not affected.
HALTDTerminate Command-List Execution
The HALT command terminates execution of the command
list. No further commands are executed. This event is made
visible to the CPU core, as specified in Section 3.6.
Syntax:
HALT
15
11 10
0
11001
00000000000
Note:
Accumulator is not affected.
DJNZDDecrement and Jump If Not Zero
The DJNZ command is used to implement loops and
branches in the command list. The value of the REPE-
AT.COUNT field is decremented by 1 and compared to 0. If
it is not equal to 0, then execution of the command list con-
tinues with the command located in the RAM address speci-
fied
by
the
REPEAT.TARGET
REPEAT.COUNT field is equal to 0, then execution contin-
ues with the next command in the command list.
field.
When
the
The DSPM has only one REPEAT register. To nest loops,
user must save the contents of the REPEAT register before
starting an inner loop, and restore it at the end of the inner
loop.
47
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