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PDSP16116MCGGDR Dataheets PDF



Part Number PDSP16116MCGGDR
Manufacturers Mitel Networks Corporation
Logo Mitel Networks Corporation
Description 16 X 16 Bit Complex Multiplier
Datasheet PDSP16116MCGGDR DatasheetPDSP16116MCGGDR Datasheet (PDF)

PDSP16116 16 X 16 Bit Complex Multiplier Supersedes October 1996 version, DS3707 - 4.2 DS3707 - 5.3 October 1997 The PDSP16116 contains four 16316 array multipliers, two 32-bit adder/subtractors and all the control logic required to support Block Floating Point Arithmetic as used in FFT applications. The PDSP16116A variant will multiply two complex (16116) bit words every 50ns and can be configured to output the complete complex (32132) bit result within a single cycle. The data format is fract.

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PDSP16116 16 X 16 Bit Complex Multiplier Supersedes October 1996 version, DS3707 - 4.2 DS3707 - 5.3 October 1997 The PDSP16116 contains four 16316 array multipliers, two 32-bit adder/subtractors and all the control logic required to support Block Floating Point Arithmetic as used in FFT applications. The PDSP16116A variant will multiply two complex (16116) bit words every 50ns and can be configured to output the complete complex (32132) bit result within a single cycle. The data format is fractional two’s complement. In combination with a PDSP16318A, the PDSP16116A forms a two-chip 20MHz complex multiplier accumulator with 20-bit accumulator registers and output shifters. The PDSP16116A in combination with two PDSP16318As and two PDSP1601As forms a complete 20MHz Radix 2 DIT FFT butterfly solution which fully supports block floating point arithmetic. The PDSP16116 has an extremely high throughput that is suited to recursive algorithms as all calculations are performed with a single pipeline delay (two cycle fall-through). XR15:0 XI15:0 YR15:0 YI15:0 REG REG REG REG MULT MULT MULT MULT FEATURES I Complex Number (16116)3(16116) Multiplication I Full 32-bit Result I 20MHz Clock Rate I Block Floating Point FFT Butterfly Support I (21)3(21) Trap I Two’s Complement Fractional Arithmetic I TTL Compatible I/O I Complex Conjugation I 2 Cycle Fall Through I 144-pin PGA or QFP packages APPLICATIONS I Fast Fourier Transforms I Digital Filtering I Radar and Sonar Processing I Instrumentation I Image Processing ORDERING INFORMATION PDSP16116 MC GGDR PDSP16116A B0 AC PDSP16116A A0 AC PDSP16116A B0 GG PDSP16116A MC GGDR PDSP16116B B0 AC PDSP16116D B0 GG 10MHz MIL-883 screened 20MHz Industrial 20MHz Military 20MHz Industrial 20MHz MIL-883 screened 25MHz Industrial 31·5MHz Industrial REG REG REG REG ADD/SUB ADD/SUB SHIFT SHIFT REG REG PR15:0 PI15:0 Fig. 1 Simplified block diagram ASSOCIATED PRODUCTS PDSP16318/A PDSP16112/A PDSP16330/A PDSP1601/A PDSP16350 PDSP16256 PDSP16510 Complex Accumulator (16116)3(12112) Complex Multiplier Pythagoras Processor ALU and Barrel Shifter Precision Digital Modulator Programmable FIR Filter Single Chip FFT Processor PDSP16116 SYSTEM FEATURES The PDSP16116 has a number of features tailored for system applications. Complex Conjugation Many algorithms using complex arithmetic require conjugation of complex data stream. This operation has traditionally required an additional ALU to multiply the imaginary component by -1. The PDSP16116 eliminates this requirement by offering on-chip complex conjugation of either of the two incoming complex data words with no loss in throughput. (21)3(21) Trap In multiply operations using two’s complement fractional notation, the (21)3(21) operation forms an invalid result because 11 is not representable in the fractional number range. The PDSP16116 eliminates this problem by trapping the (21)3(21) operation and forcing the multiplier result to become the most positive repr.


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