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| 型號： | SP431 |
| 廠商： | Intersil Corporation |
| 英文描述： | Serial I/O Filter |
| 中文描述： | 串行I / O過濾器 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 144K |
| 代理商： | SP431 |
1
File Number
3555.6
HSP43124
Serial I/O Filter
The Serial I/O Filter is a high performance filter engine that is
ideal for off loading the burden of filter processing from a
DSP microprocessor. It supports a variety of multistage filter
configurations based on a user programmable filter and fixed
coefficient halfband filters. These configurations include a
programmable FIR filter of up to 256 taps, a cascade of from
one to five halfband filters, or a cascade of halfband filters
followed by a programmable FIR. The half band filters each
decimate by a factor of two, and the FIR filter decimates from
one to eight. When all six filters are selected, a maximum
decimation of 256 is provided.
For digital tuning applications, a separate multiplier is
provided which allows the incoming data stream to be
multiplied, or mixed, by a user supplied mix factor. A two pin
interface is provided for serially loading the mix factor from
an external source or selecting the mix factor from an on-
board ROM. The on-board ROM contains samples of a
sinusoid capable of spectrally shifting the input data by one
quarter of the sample rate, F
S
/4. This allows the chip to
function as a digital down converter when the filter stages
are configured as a low-pass filter.
The serial interface for3-input and output data is compatible
with the serial ports of common DSP microprocessors.
Coefficients and configuration data are loaded over a
bidirectional eight bit interface.
Features
45MHz Clock Rate
256 Tap Programmable FIR Filter
24-Bit Data, 32-Bit Coefficients
Cascade of up to 5 Half Band Filters
Decimation from 1 to 256
Two Pin Interface for Down Conversion by F
S
/4
Multiplier for Mixing or Scaling Input with an External
Source
Serial I/O Compatible with Most DSP Microprocessors
Applications
Low Cost FIR Filter
Filter Co-Processor
Digital Tuner
Block Diagram
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
HSP43124PC-45
0 to 70
28 Ld PDIP
E28.6
HSP43124PC-33
0 to 70
28 Ld PDIP
E28.6
HSP43124SC-45
0 to 70
28 Ld SOIC
M28.3
HSP43124SC-33
0 to 70
28 Ld SOIC
M28.3
HSP43124SI-40
-40 to 85
28 Ld SOIC
M28.3
P
F
F
I
F
DIN
SCLK
SYNCIN
MXIN
SYNCMX
O
F
DOUT
SYNCOUT
CLKOUT
A
C
W
CONTROL
INTERFACE
R
F
F
HALF
BAND
FILTER
#5
HALF
BAND
FILTER
#2
HALF
BAND
FILTER
#1
Data Sheet
May 1999
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
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