GF9101 데이터 시트보기 (PDF) - Gennum -> Semtech
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GF9101 Datasheet PDF : 23 Pages
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MultiGEN ™ GF9101 High
Performance Multirate Digital Filter
FEATURES
• highly optimized & flexible architecture for multirate
FIR filtering applications
• implements dual 12 tap filters operating at 40 MHz or
single 23 or 24 tap filter operating at 20 MHz maximum
data rate
• stores up to 108 fully-programmable 12 tap filters with
12 bit coefficients at each tap, dynamically
addressable in each clock cycle
• 3 flexible memory loading modes
• 20 bit pipeline for cascading up to 3 devices
• 20 bit output accumulator
• filter output negate and zero controls
• supports both symmetrical and asymmetrical FIR
filters
• 40 MHz maximum computation and input/output data
rates
DESCRIPTION
DATA SHEET
The GF9101 is a high performance multirate digital filter
which can be programmed to implement a wide range of
signal processing functions using both symmetrical and
asymmetrical filter structures. It is composed of a 12-tap
FIR filter with internal RAM to hold up to 108 individual
filters. An externally controlled address bus selects one of
the 108 filters in each clock cycle. Pipelined architecture
allows cascading of up to three devices with no additional
hardware.
Two 10-bit input shift registers are provided for multiplexed
filtering applications. The 12-bit coefficients can be
programmed in serial, high speed parallel or
microprocessor modes. In the high speed parallel mode,
any one of the 108 filters can be reprogrammed in 18 clock
cycles.
ORDERING INFORMATION
APPLICATIONS
Video rate conversion; High performance FIR filters;
Adaptive digital filters; Video encoding; Digital modulation
PART NUMBER
GF9101 - CMQ
PACKAGE
160 pin Metal Quad
TEMPERATURE
0° to 70°C
+10
DATA–A–IN
ENA R
+10
DATA–B–OUT
ENB R
SEL–A/B R
ENC R
COEF–ADDR R
1
0
TAP TAP
CELL CELL
12
7
TAP
CELL
11
7
+10
DATA–A–OUT
+10
TAP DATA–B–IN
CELL
12
ZERO
R
NEGATE
R
Σ
±14.11
4R
±13.6 TRUNCATED
DELAY
2
1,3,4,5
R
DELAY SEL
±13.6
CONFIGURATION
REGISTER
DATA B SEL
PIPELINE–IN
±13.6
CARRY
IN
±13.6
R
±13.6
0
+
R
1 ±13.6
±13.6
PIPELINE–OUT
Revision Date: July 1999
FB–SEL R
BLOCK DIAGRAM
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: info@gennum.com
www.gennum.com
Document No. 520 - 64 - 7
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