
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
Revision Date: July 1999
Document No. 520 - 64 - 7
DATA SHEET
G
DATA–A–OUT
+10
7
4R
DELAY
1,3,4,5
R
DATA
–
B
–
IN
CONFIGURATION
REGISTER
2
±14.11
±13.6 TRUNCATED
R
NEGATE
DELAY SEL
±13.6
+
PIPELINE–OUT
±13.6
R
BLOCK DIAGRAM
R
R
1
0
±13.6
±13.6
PIPELINE–IN
FB–SEL
CARRY
IN
DATA B SEL
+10
1
0
±13.6
±13.6
ZERO
R
7
ENA
+10
ENB
ENC
COEF–ADDR
DATA+10
DATA–B–OUT
SEL–A/B
TAP
CELL
2
TAP
CELL
1
Σ
R
R
R
R
R
TAP
CELL
11
TAP
CELL
12
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
APPLICATIONS
Video rate conversion; High performance FIR filters;
Adaptive digital filters; Video encoding; Digital modulation
DESCRIPTION
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,
microprocessor modes. In the high speed parallel mode,
any one of the 108 filters can be reprogrammed in 18 clock
cycles.
high
speed
parallel
or
ORDERING INFORMATION
PART NUMBER
PACKAGE
TEMPERATURE
GF9101 - CMQ
160 pin Metal Quad
0
°
to 70
°
C
Multi
GEN
GF9101 High
Performance Multirate Digital Filter