PDSP16318_96 Datasheet, PDF (1/8 Pages) Mitel Networks Corporation – Complex Accumulator

PDSP16318/P^PD^DS^SPP¹⁶1³¹6⁸3^/11³⁶8¹⁸A^A
Supersedes version in December 1993 Digital Video & DSP IC Handbook, HB3923-1
Complex Accumulator
Advance Information
DS3708 - 2.4 September 1996
The PDSP16318 contains two independent 20-bit Adder/
Subtractors combined with accumulator registers and shift
structures. The four port architecture permits full 20MHz
throughout in FFT and filter applications.
Two PDSP16318As combined with a single PDSP16112A
Complex Multiplier provide a complete arithmetic solution for
a Radix 2 DIT FFT Butterfly. A new complex Butterfly result
can be generated every 50ns allowing 1K complex FFTs to be
executed in 256µs.
FEATURES
s Full 20MHz Throughout in FFT Applications
s Four Independent 16-bit I/O Ports
s 20-bit Addition or Accumulation
s Fully Compatible with PDSP16112 Complex Multiplier
s On Chip Shift Structures for Result Scaling
s Overflow Detection
s Independent Three-State Outputs and Clock
Enables for 2 Port 20MHz Operation
s 1.4 micron CMOS
s 500mW Maximum Power Dissipation
s 84 Pin PGA or QFP packages
PIN 1A INDEX MARK
ON TOP SURFACE
A
B
C
D
E
F
G
H
J
K
L
11 10 9 8 7 6 5 4 3 2 1
AC84
Fig.1 Pin connections - bottom view (AC84 - PGA)
APPLICATIONS
s High speed Complex FFT or DFTs
s Complex Finite Impulse Response (FIR) Filtering
s Complex Conjugation
s Complex Correlation/Convolution
ASSOCIATED PRODUCTS
PDSP16112 16 x 12 Complex Multiplier
PDSP16116 16 x 16 Complex Multiplier
PDSP1601 ALU and Barrel Shifter
PDSP16330 Pythagoras Processor
Fig. 2 PDSP16318 simplified block diagram
1