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): 55/102頁
文件大小: 1053K
代理商: NS32FX164V-25
3.0 Functional Description
(Continued)
Operation:
à
real X,Y,Z;
real acc A;
for (n
4
0; n
k
LENG; n
00
)
à
A
4
(real acc) ((extended)A);
A
4
(real acc) (A * X
[
n
]
))
0
Y
[
n
0
2
]
;
Z
[
n
] 4
(real) A;
ó
ó
Note:
The term (A
*
X
[
n
]
) is a 32-bit by 16-bit multiplication. During the
conversion of this product to a realDaccumulator data type, rounding
is done if PARAM.RND is ‘‘1’’. During the conversion of A to a real
data type, the result is rounded if Y
[
0
]
e
0x0080, or truncated if Y
[
0
]
e
0x0. The result with other values of Y
[
0
]
are unpredictable. Y
[
1
]
must be specified as 0x7fff.
3.5 SYSTEM INTERFACE
This
NS32FX164 interface to the external world. Descriptions of
the CPU requirements as well as the various bus character-
istics are provided here. Details on other device characteris-
tics including timing are given in Sections 4.2–4.4.2.
section
provides
general
information
on
the
3.5.1 Power and Grounding
The NS32FX164 requires a single 5V power supply, applied
on the V
CC
pins. These pins should be connected together
by a power (V
CC
) plane on the printed circuit board.
The grounding connections are made on the GND pins.
These pins should be connected together by a ground
(GND) plane on the printed circuit board.
Both power and ground connections are shown in Figure
3-14.
TL/EE/11267–25
FIGURE 3-13. DSP Module Block Diagram
55
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